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<h1 class="site-logo" id="site-title">Astronomical Data in Python</h1>
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Astronomical Data in Python
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Queries
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Coordinates and units
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Chapter 3
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Chapter 4
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Chapter 5
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Chapter 6
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Chapter 7
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Writing queries
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</a>
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<a class="reference internal nav-link" href="#add-one-thing-at-a-time-and-test-as-you-go">
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Add one thing at a time and test as you go
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Exercise
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<div class="cell docutils container">
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<div class="cell_input docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">astroquery.gaia</span> <span class="kn">import</span> <span class="n">Gaia</span>
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</pre></div>
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</div>
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</div>
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<div class="cell_output docutils container">
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<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>Created TAP+ (v1.2.1) - Connection:
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Host: gea.esac.esa.int
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Use HTTPS: True
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Port: 443
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SSL Port: 443
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Created TAP+ (v1.2.1) - Connection:
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Host: geadata.esac.esa.int
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Use HTTPS: True
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Port: 443
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SSL Port: 443
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</pre></div>
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</div>
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</div>
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</div>
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<div class="cell docutils container">
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<div class="cell_input docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">Gaia</span>
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</pre></div>
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</div>
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</div>
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<div class="cell_output docutils container">
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<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span><astroquery.gaia.core.GaiaClass at 0x7fd23f809850>
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</pre></div>
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</div>
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</div>
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</div>
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<div class="cell docutils container">
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<div class="cell_input docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">tables</span> <span class="o">=</span> <span class="n">Gaia</span><span class="o">.</span><span class="n">load_tables</span><span class="p">(</span><span class="n">only_names</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
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</pre></div>
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</div>
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</div>
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<div class="cell_output docutils container">
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<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>INFO: Retrieving tables... [astroquery.utils.tap.core]
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INFO: Parsing tables... [astroquery.utils.tap.core]
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INFO: Done. [astroquery.utils.tap.core]
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</pre></div>
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</div>
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</div>
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</div>
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<div class="cell docutils container">
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<div class="cell_input docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="nb">type</span><span class="p">(</span><span class="n">tables</span><span class="p">)</span>
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</pre></div>
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</div>
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</div>
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<div class="cell_output docutils container">
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<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>list
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</pre></div>
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</div>
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</div>
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</div>
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<div class="cell docutils container">
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<div class="cell_input docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="k">for</span> <span class="n">table</span> <span class="ow">in</span> <span class="n">tables</span><span class="p">:</span>
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<span class="nb">print</span><span class="p">(</span><span class="n">table</span><span class="o">.</span><span class="n">get_qualified_name</span><span class="p">())</span>
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</pre></div>
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</div>
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</div>
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<div class="cell_output docutils container">
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<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>external.external.apassdr9
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external.external.gaiadr2_geometric_distance
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external.external.galex_ais
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external.external.ravedr5_com
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external.external.ravedr5_dr5
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external.external.ravedr5_gra
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external.external.ravedr5_on
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external.external.sdssdr13_photoprimary
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external.external.skymapperdr1_master
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external.external.tmass_xsc
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public.public.hipparcos
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public.public.hipparcos_newreduction
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public.public.hubble_sc
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public.public.igsl_source
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public.public.igsl_source_catalog_ids
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public.public.tycho2
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public.public.dual
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tap_config.tap_config.coord_sys
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tap_config.tap_config.properties
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tap_schema.tap_schema.columns
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tap_schema.tap_schema.key_columns
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tap_schema.tap_schema.keys
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tap_schema.tap_schema.schemas
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tap_schema.tap_schema.tables
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gaiadr1.gaiadr1.aux_qso_icrf2_match
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gaiadr1.gaiadr1.ext_phot_zero_point
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gaiadr1.gaiadr1.allwise_best_neighbour
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gaiadr1.gaiadr1.allwise_neighbourhood
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gaiadr1.gaiadr1.gsc23_best_neighbour
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gaiadr1.gaiadr1.gsc23_neighbourhood
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gaiadr1.gaiadr1.ppmxl_best_neighbour
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gaiadr1.gaiadr1.ppmxl_neighbourhood
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gaiadr1.gaiadr1.sdss_dr9_best_neighbour
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gaiadr1.gaiadr1.sdss_dr9_neighbourhood
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gaiadr1.gaiadr1.tmass_best_neighbour
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gaiadr1.gaiadr1.tmass_neighbourhood
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gaiadr1.gaiadr1.ucac4_best_neighbour
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gaiadr1.gaiadr1.ucac4_neighbourhood
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gaiadr1.gaiadr1.urat1_best_neighbour
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gaiadr1.gaiadr1.urat1_neighbourhood
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gaiadr1.gaiadr1.cepheid
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gaiadr1.gaiadr1.phot_variable_time_series_gfov
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gaiadr1.gaiadr1.phot_variable_time_series_gfov_statistical_parameters
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gaiadr1.gaiadr1.rrlyrae
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gaiadr1.gaiadr1.variable_summary
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gaiadr1.gaiadr1.allwise_original_valid
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gaiadr1.gaiadr1.gsc23_original_valid
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gaiadr1.gaiadr1.ppmxl_original_valid
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gaiadr1.gaiadr1.sdssdr9_original_valid
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gaiadr1.gaiadr1.tmass_original_valid
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gaiadr1.gaiadr1.ucac4_original_valid
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gaiadr1.gaiadr1.urat1_original_valid
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gaiadr1.gaiadr1.gaia_source
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gaiadr1.gaiadr1.tgas_source
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gaiadr2.gaiadr2.aux_allwise_agn_gdr2_cross_id
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gaiadr2.gaiadr2.aux_iers_gdr2_cross_id
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gaiadr2.gaiadr2.aux_sso_orbit_residuals
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gaiadr2.gaiadr2.aux_sso_orbits
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gaiadr2.gaiadr2.dr1_neighbourhood
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gaiadr2.gaiadr2.allwise_best_neighbour
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gaiadr2.gaiadr2.allwise_neighbourhood
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gaiadr2.gaiadr2.apassdr9_best_neighbour
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gaiadr2.gaiadr2.apassdr9_neighbourhood
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gaiadr2.gaiadr2.gsc23_best_neighbour
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gaiadr2.gaiadr2.gsc23_neighbourhood
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gaiadr2.gaiadr2.hipparcos2_best_neighbour
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gaiadr2.gaiadr2.hipparcos2_neighbourhood
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gaiadr2.gaiadr2.panstarrs1_best_neighbour
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gaiadr2.gaiadr2.panstarrs1_neighbourhood
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gaiadr2.gaiadr2.ppmxl_best_neighbour
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gaiadr2.gaiadr2.ppmxl_neighbourhood
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gaiadr2.gaiadr2.ravedr5_best_neighbour
|
|
gaiadr2.gaiadr2.ravedr5_neighbourhood
|
|
gaiadr2.gaiadr2.sdssdr9_best_neighbour
|
|
gaiadr2.gaiadr2.sdssdr9_neighbourhood
|
|
gaiadr2.gaiadr2.tmass_best_neighbour
|
|
gaiadr2.gaiadr2.tmass_neighbourhood
|
|
gaiadr2.gaiadr2.tycho2_best_neighbour
|
|
gaiadr2.gaiadr2.tycho2_neighbourhood
|
|
gaiadr2.gaiadr2.urat1_best_neighbour
|
|
gaiadr2.gaiadr2.urat1_neighbourhood
|
|
gaiadr2.gaiadr2.sso_observation
|
|
gaiadr2.gaiadr2.sso_source
|
|
gaiadr2.gaiadr2.vari_cepheid
|
|
gaiadr2.gaiadr2.vari_classifier_class_definition
|
|
gaiadr2.gaiadr2.vari_classifier_definition
|
|
gaiadr2.gaiadr2.vari_classifier_result
|
|
gaiadr2.gaiadr2.vari_long_period_variable
|
|
gaiadr2.gaiadr2.vari_rotation_modulation
|
|
gaiadr2.gaiadr2.vari_rrlyrae
|
|
gaiadr2.gaiadr2.vari_short_timescale
|
|
gaiadr2.gaiadr2.vari_time_series_statistics
|
|
gaiadr2.gaiadr2.panstarrs1_original_valid
|
|
gaiadr2.gaiadr2.gaia_source
|
|
gaiadr2.gaiadr2.ruwe
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">meta</span> <span class="o">=</span> <span class="n">Gaia</span><span class="o">.</span><span class="n">load_table</span><span class="p">(</span><span class="s1">'gaiadr2.gaia_source'</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>Retrieving table 'gaiadr2.gaia_source'
|
|
Parsing table 'gaiadr2.gaia_source'...
|
|
Done.
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">meta</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span><astroquery.utils.tap.model.taptable.TapTableMeta at 0x7fd23e840b80>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="nb">print</span><span class="p">(</span><span class="n">meta</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>TAP Table name: gaiadr2.gaiadr2.gaia_source
|
|
Description: This table has an entry for every Gaia observed source as listed in the
|
|
Main Database accumulating catalogue version from which the catalogue
|
|
release has been generated. It contains the basic source parameters,
|
|
that is only final data (no epoch data) and no spectra (neither final
|
|
nor epoch).
|
|
Num. columns: 96
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">meta</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
|
|
<span class="nb">print</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>solution_id
|
|
designation
|
|
source_id
|
|
random_index
|
|
ref_epoch
|
|
ra
|
|
ra_error
|
|
dec
|
|
dec_error
|
|
parallax
|
|
parallax_error
|
|
parallax_over_error
|
|
pmra
|
|
pmra_error
|
|
pmdec
|
|
pmdec_error
|
|
ra_dec_corr
|
|
ra_parallax_corr
|
|
ra_pmra_corr
|
|
ra_pmdec_corr
|
|
dec_parallax_corr
|
|
dec_pmra_corr
|
|
dec_pmdec_corr
|
|
parallax_pmra_corr
|
|
parallax_pmdec_corr
|
|
pmra_pmdec_corr
|
|
astrometric_n_obs_al
|
|
astrometric_n_obs_ac
|
|
astrometric_n_good_obs_al
|
|
astrometric_n_bad_obs_al
|
|
astrometric_gof_al
|
|
astrometric_chi2_al
|
|
astrometric_excess_noise
|
|
astrometric_excess_noise_sig
|
|
astrometric_params_solved
|
|
astrometric_primary_flag
|
|
astrometric_weight_al
|
|
astrometric_pseudo_colour
|
|
astrometric_pseudo_colour_error
|
|
mean_varpi_factor_al
|
|
astrometric_matched_observations
|
|
visibility_periods_used
|
|
astrometric_sigma5d_max
|
|
frame_rotator_object_type
|
|
matched_observations
|
|
duplicated_source
|
|
phot_g_n_obs
|
|
phot_g_mean_flux
|
|
phot_g_mean_flux_error
|
|
phot_g_mean_flux_over_error
|
|
phot_g_mean_mag
|
|
phot_bp_n_obs
|
|
phot_bp_mean_flux
|
|
phot_bp_mean_flux_error
|
|
phot_bp_mean_flux_over_error
|
|
phot_bp_mean_mag
|
|
phot_rp_n_obs
|
|
phot_rp_mean_flux
|
|
phot_rp_mean_flux_error
|
|
phot_rp_mean_flux_over_error
|
|
phot_rp_mean_mag
|
|
phot_bp_rp_excess_factor
|
|
phot_proc_mode
|
|
bp_rp
|
|
bp_g
|
|
g_rp
|
|
radial_velocity
|
|
radial_velocity_error
|
|
rv_nb_transits
|
|
rv_template_teff
|
|
rv_template_logg
|
|
rv_template_fe_h
|
|
phot_variable_flag
|
|
l
|
|
b
|
|
ecl_lon
|
|
ecl_lat
|
|
priam_flags
|
|
teff_val
|
|
teff_percentile_lower
|
|
teff_percentile_upper
|
|
a_g_val
|
|
a_g_percentile_lower
|
|
a_g_percentile_upper
|
|
e_bp_min_rp_val
|
|
e_bp_min_rp_percentile_lower
|
|
e_bp_min_rp_percentile_upper
|
|
flame_flags
|
|
radius_val
|
|
radius_percentile_lower
|
|
radius_percentile_upper
|
|
lum_val
|
|
lum_percentile_lower
|
|
lum_percentile_upper
|
|
datalink_url
|
|
epoch_photometry_url
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">meta2</span> <span class="o">=</span> <span class="n">Gaia</span><span class="o">.</span><span class="n">load_table</span><span class="p">(</span><span class="s1">'gaiadr2.panstarrs1_original_valid'</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>Retrieving table 'gaiadr2.panstarrs1_original_valid'
|
|
Parsing table 'gaiadr2.panstarrs1_original_valid'...
|
|
Done.
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="k">for</span> <span class="n">column</span> <span class="ow">in</span> <span class="n">meta2</span><span class="o">.</span><span class="n">columns</span><span class="p">:</span>
|
|
<span class="nb">print</span><span class="p">(</span><span class="n">column</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>obj_name
|
|
obj_id
|
|
ra
|
|
dec
|
|
ra_error
|
|
dec_error
|
|
epoch_mean
|
|
g_mean_psf_mag
|
|
g_mean_psf_mag_error
|
|
g_flags
|
|
r_mean_psf_mag
|
|
r_mean_psf_mag_error
|
|
r_flags
|
|
i_mean_psf_mag
|
|
i_mean_psf_mag_error
|
|
i_flags
|
|
z_mean_psf_mag
|
|
z_mean_psf_mag_error
|
|
z_flags
|
|
y_mean_psf_mag
|
|
y_mean_psf_mag_error
|
|
y_flags
|
|
n_detections
|
|
zone_id
|
|
obj_info_flag
|
|
quality_flag
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="writing-queries">
|
|
<h1>Writing queries<a class="headerlink" href="#writing-queries" title="Permalink to this headline">¶</a></h1>
|
|
<p>More text here…</p>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">columns</span> <span class="o">=</span> <span class="s1">'source_id, ref_epoch, ra, dec, parallax'</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">columns2</span> <span class="o">=</span> <span class="s1">'source_id, ref_epoch, ra, dec, parallax, parallax_error, radial_velocity'</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">query_base</span> <span class="o">=</span> <span class="s2">"""SELECT</span>
|
|
<span class="s2">TOP 30</span>
|
|
<span class="si">{columns}</span><span class="s2"></span>
|
|
<span class="s2">FROM gaiadr2.gaia_source</span>
|
|
<span class="s2">WHERE parallax < </span><span class="si">{max_parallax}</span><span class="s2"></span>
|
|
<span class="s2"> AND bp_rp BETWEEN -0.75 AND 2</span>
|
|
<span class="s2">"""</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">query</span> <span class="o">=</span> <span class="n">query_base</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">columns</span><span class="o">=</span><span class="n">columns2</span><span class="p">,</span> <span class="n">max_parallax</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">query</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>'SELECT\nTOP 30\nsource_id, ref_epoch, ra, dec, parallax, parallax_error, radial_velocity\nFROM gaiadr2.gaia_source\nWHERE parallax < 1\n AND bp_rp BETWEEN -0.75 AND 2\n'
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="nb">print</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>SELECT
|
|
TOP 30
|
|
source_id, ref_epoch, ra, dec, parallax, parallax_error, radial_velocity
|
|
FROM gaiadr2.gaia_source
|
|
WHERE parallax < 1
|
|
AND bp_rp BETWEEN -0.75 AND 2
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="add-one-thing-at-a-time-and-test-as-you-go">
|
|
<h1>Add one thing at a time and test as you go<a class="headerlink" href="#add-one-thing-at-a-time-and-test-as-you-go" title="Permalink to this headline">¶</a></h1>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">job</span> <span class="o">=</span> <span class="n">Gaia</span><span class="o">.</span><span class="n">launch_job_async</span><span class="p">(</span><span class="n">query</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>INFO: Query finished. [astroquery.utils.tap.core]
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">job</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span><astroquery.utils.tap.model.job.Job at 0x7fd23e4cb250>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="nb">print</span><span class="p">(</span><span class="n">job</span><span class="p">)</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span><Table length=30>
|
|
name dtype unit description n_bad
|
|
--------------- ------- ------ ------------------------------------------------------------------ -----
|
|
source_id int64 Unique source identifier (unique within a particular Data Release) 0
|
|
ref_epoch float64 yr Reference epoch 0
|
|
ra float64 deg Right ascension 0
|
|
dec float64 deg Declination 0
|
|
parallax float64 mas Parallax 0
|
|
parallax_error float64 mas Standard error of parallax 0
|
|
radial_velocity float64 km / s Radial velocity 30
|
|
Jobid: 1605559085364O
|
|
Phase: COMPLETED
|
|
Owner: None
|
|
Output file: async_20201116153805.vot
|
|
Results: None
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">results</span> <span class="o">=</span> <span class="n">job</span><span class="o">.</span><span class="n">get_results</span><span class="p">()</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div class="cell docutils container">
|
|
<div class="cell_input docutils container">
|
|
<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">results</span>
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
<div class="cell_output docutils container">
|
|
<div class="output text_html"><i>Table length=30</i>
|
|
<table id="table140540965072960" class="table-striped table-bordered table-condensed">
|
|
<thead><tr><th>source_id</th><th>ref_epoch</th><th>ra</th><th>dec</th><th>parallax</th><th>parallax_error</th><th>radial_velocity</th></tr></thead>
|
|
<thead><tr><th></th><th>yr</th><th>deg</th><th>deg</th><th>mas</th><th>mas</th><th>km / s</th></tr></thead>
|
|
<thead><tr><th>int64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th><th>float64</th></tr></thead>
|
|
<tr><td>1859772967200548480</td><td>2015.5</td><td>311.7716418009337</td><td>31.60557436984631</td><td>0.7767665671013428</td><td>0.27955289399217836</td><td>--</td></tr>
|
|
<tr><td>1859782313041944832</td><td>2015.5</td><td>311.17390526154423</td><td>31.258797158719847</td><td>-0.25450688880064243</td><td>0.5006522058606456</td><td>--</td></tr>
|
|
<tr><td>1859780869933153280</td><td>2015.5</td><td>311.06679375877263</td><td>31.219207019583653</td><td>0.34319978848338417</td><td>0.9313353159918977</td><td>--</td></tr>
|
|
<tr><td>1859815057881369728</td><td>2015.5</td><td>311.55787663577127</td><td>31.62814807023982</td><td>-1.1955122356250545</td><td>0.7536507995983105</td><td>--</td></tr>
|
|
<tr><td>1859764720853733504</td><td>2015.5</td><td>311.6968717764019</td><td>31.434121014193668</td><td>-2.4116892107687353</td><td>1.0180585839909577</td><td>--</td></tr>
|
|
<tr><td>1859760494615052672</td><td>2015.5</td><td>311.7229144199955</td><td>31.344728455960162</td><td>0.33945025045930244</td><td>0.026879108757164063</td><td>--</td></tr>
|
|
<tr><td>1859773413877146880</td><td>2015.5</td><td>311.8239717687711</td><td>31.5938682761331</td><td>-0.023183552578126928</td><td>0.05352617574037097</td><td>--</td></tr>
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<tr><td>1859769703016675328</td><td>2015.5</td><td>311.9698646366692</td><td>31.564087117425384</td><td>0.7133302224741606</td><td>0.8298725715561183</td><td>--</td></tr>
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<tr><td>1859813168089772032</td><td>2015.5</td><td>311.59531018136306</td><td>31.532982947737132</td><td>0.3676714937163033</td><td>0.7347671145224394</td><td>--</td></tr>
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<tr><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td><td>...</td></tr>
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<tr><td>1859792341785287808</td><td>2015.5</td><td>311.2492437362059</td><td>31.473206794319317</td><td>0.3304263088856413</td><td>0.13675690977806274</td><td>--</td></tr>
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<tr><td>1859783408252461056</td><td>2015.5</td><td>311.11804657574396</td><td>31.297510342315928</td><td>0.0746539334379134</td><td>0.37680767316478425</td><td>--</td></tr>
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<tr><td>1859810281870133120</td><td>2015.5</td><td>311.13172365620215</td><td>31.686981863130708</td><td>0.26853128238207785</td><td>0.4553883976568405</td><td>--</td></tr>
|
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<tr><td>1859794815685744640</td><td>2015.5</td><td>310.96367939259284</td><td>31.31718097982628</td><td>-2.992496067633503</td><td>1.1089042277934307</td><td>--</td></tr>
|
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<tr><td>1859757677108231424</td><td>2015.5</td><td>311.99649307561697</td><td>31.506728013267534</td><td>0.7281871916676326</td><td>0.7765992662451379</td><td>--</td></tr>
|
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<tr><td>1859771146134503680</td><td>2015.5</td><td>311.74605797643176</td><td>31.485773669678412</td><td>0.13099351906829404</td><td>0.6713360113643849</td><td>--</td></tr>
|
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<tr><td>1859768667930613760</td><td>2015.5</td><td>311.81939870908116</td><td>31.50296753045608</td><td>0.33351119622751657</td><td>0.20853032024261492</td><td>--</td></tr>
|
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<tr><td>1859783687439520384</td><td>2015.5</td><td>311.1026531878309</td><td>31.318830227630794</td><td>0.36306118566694123</td><td>0.059633195646531766</td><td>--</td></tr>
|
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<tr><td>1859813885341735296</td><td>2015.5</td><td>311.6205103129279</td><td>31.569289167922214</td><td>-0.07059528156917382</td><td>0.14061938403885946</td><td>--</td></tr>
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<tr><td>1859777670175822720</td><td>2015.5</td><td>311.12238771094496</td><td>31.20200621855245</td><td>0.062101356212957384</td><td>0.33608219792403937</td><td>--</td></tr>
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</table></div></div>
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<div class="cell docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="nb">type</span><span class="p">(</span><span class="n">results</span><span class="p">)</span>
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</pre></div>
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<div class="cell_output docutils container">
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<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>astropy.table.table.Table
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</pre></div>
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<div class="section" id="exercise">
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<h1>Exercise<a class="headerlink" href="#exercise" title="Permalink to this headline">¶</a></h1>
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<p>Read about SQL operators</p>
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<p>https://www.w3schools.com/sql/sql_operators.asp</p>
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<p>Then modify the previous query to select rows where
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<code class="docutils literal notranslate"><span class="pre">bp_rp</span></code> is between -0.75 and 2.</p>
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<p>You can read about this variable at
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https://gea.esac.esa.int/archive/documentation/GDR2/Gaia_archive/chap_datamodel/sec_dm_main_tables/ssec_dm_gaia_source.html</p>
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<div class="cell docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">pandas</span> <span class="k">as</span> <span class="nn">pd</span>
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<span class="n">df1</span> <span class="o">=</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">(</span><span class="n">index</span><span class="o">=</span><span class="p">[</span><span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">])</span>
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<span class="n">df1</span><span class="p">[</span><span class="s1">'a'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'a'</span>
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<span class="n">df1</span>
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</pre></div>
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</div>
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<tbody>
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<th>0</th>
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<td>a</td>
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<th>1</th>
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<td>a</td>
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<tr>
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<th>2</th>
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<td>a</td>
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</div></div></div>
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<div class="cell docutils container">
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<div class="cell_input docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">df2</span> <span class="o">=</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">(</span><span class="n">index</span><span class="o">=</span><span class="p">[</span><span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">4</span><span class="p">])</span>
|
|
<span class="n">df2</span><span class="p">[</span><span class="s1">'b'</span><span class="p">]</span> <span class="o">=</span> <span class="s1">'b'</span>
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<span class="n">df2</span>
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</pre></div>
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<th></th>
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</thead>
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<tr>
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<th>0</th>
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<td>b</td>
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<tr>
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<th>2</th>
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<td>b</td>
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<tr>
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<th>4</th>
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<td>b</td>
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</table>
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</div></div></div>
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<div class="cell docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">df1</span><span class="p">[</span><span class="s1">'b'</span><span class="p">]</span> <span class="o">=</span> <span class="n">df2</span><span class="p">[</span><span class="s1">'b'</span><span class="p">]</span>
|
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<span class="n">df1</span>
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</pre></div>
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<th></th>
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<th>a</th>
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</thead>
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<th>0</th>
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<td>a</td>
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<td>b</td>
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</tr>
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<tr>
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<th>1</th>
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<td>a</td>
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<td>NaN</td>
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<tr>
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<th>2</th>
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<td>a</td>
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<td>b</td>
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</table>
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</div></div></div>
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<div class="cell docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">df1</span><span class="o">.</span><span class="n">shape</span>
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</pre></div>
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</div>
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<div class="cell_output docutils container">
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<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>(3, 2)
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</pre></div>
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</div>
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</div>
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</div>
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<div class="cell docutils container">
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<div class="cell_input docutils container">
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<div class="highlight-ipython3 notranslate"><div class="highlight"><pre><span></span><span class="n">df1</span> <span class="ow">is</span> <span class="n">df2</span>
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</pre></div>
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</div>
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</div>
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<div class="cell_output docutils container">
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<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>False
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</pre></div>
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</div>
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</div>
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</div>
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</div>
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