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<h1>Source code for astropy.io.fits</h1><div class="highlight"><pre>
<span class="c"># Licensed under a 3-clause BSD style license - see PYFITS.rst</span>
<span class="sd">"""</span>
<span class="sd">A package for reading and writing FITS files and manipulating their</span>
<span class="sd">contents.</span>
<span class="sd">A module for reading and writing Flexible Image Transport System</span>
<span class="sd">(FITS) files. This file format was endorsed by the International</span>
<span class="sd">Astronomical Union in 1999 and mandated by NASA as the standard format</span>
<span class="sd">for storing high energy astrophysics data. For details of the FITS</span>
<span class="sd">standard, see the NASA/Science Office of Standards and Technology</span>
<span class="sd">publication, NOST 100-2.0.</span>
<span class="sd">"""</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">py3compat</span>
<span class="kn">from</span> <span class="nn">...config</span> <span class="kn">import</span> <span class="n">ConfigurationItem</span>
<span class="c"># Set module-global boolean variables</span>
<span class="c"># TODO: Make it possible to set these variables via environment variables</span>
<span class="c"># again, once support for that is added to Astropy</span>
<span class="n">ENABLE_RECORD_VALUED_KEYWORD_CARDS</span> <span class="o">=</span> <span class="n">ConfigurationItem</span><span class="p">(</span>
<span class="s">'enabled_record_valued_keyword_cards'</span><span class="p">,</span> <span class="bp">True</span><span class="p">,</span>
<span class="s">'If True, enable support for record-valued keywords as described by '</span>
<span class="s">'FITS WCS Paper IV. Otherwise they are treated as normal keywords.'</span><span class="p">)</span>
<span class="n">EXTENSION_NAME_CASE_SENSITIVE</span> <span class="o">=</span> <span class="n">ConfigurationItem</span><span class="p">(</span>
<span class="s">'extension_name_case_sensitive'</span><span class="p">,</span> <span class="bp">False</span><span class="p">,</span>
<span class="s">'If True, extension names (i.e. the EXTNAME keyword) should be '</span>
<span class="s">'treated as case-sensitive.'</span><span class="p">)</span>
<span class="n">STRIP_HEADER_WHITESPACE</span> <span class="o">=</span> <span class="n">ConfigurationItem</span><span class="p">(</span>
<span class="s">'strip_header_whitespace'</span><span class="p">,</span> <span class="bp">True</span><span class="p">,</span>
<span class="s">'If True, automatically remove trailing whitespace for string values in '</span>
<span class="s">'headers. Otherwise the values are returned verbatim, with all '</span>
<span class="s">'whitespace intact.'</span><span class="p">)</span>
<span class="n">USE_MEMMAP</span> <span class="o">=</span> <span class="n">ConfigurationItem</span><span class="p">(</span>
<span class="s">'use_memmap'</span><span class="p">,</span> <span class="bp">True</span><span class="p">,</span>
<span class="s">'If True, use memory-mapped file access to read/write the data in '</span>
<span class="s">'FITS files. This generally provides better performance, especially '</span>
<span class="s">'for large files, but may affect performance in I/O-heavy '</span>
<span class="s">'applications.'</span><span class="p">)</span>
<span class="c"># Public API compatibility imports</span>
<span class="c"># These need to come after the global config variables, as some of the</span>
<span class="c"># submodules use them</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">card</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">column</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">convenience</span>
<span class="kn">from</span> <span class="nn">.</span> <span class="kn">import</span> <span class="n">hdu</span>
<span class="kn">from</span> <span class="nn">.card</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">.column</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">.convenience</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">.diff</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">.fitsrec</span> <span class="kn">import</span> <span class="n">FITS_record</span><span class="p">,</span> <span class="n">FITS_rec</span>
<span class="kn">from</span> <span class="nn">.hdu</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">.hdu.groups</span> <span class="kn">import</span> <span class="n">GroupData</span>
<span class="kn">from</span> <span class="nn">.hdu.hdulist</span> <span class="kn">import</span> <span class="n">fitsopen</span> <span class="k">as</span> <span class="nb">open</span>
<span class="kn">from</span> <span class="nn">.hdu.image</span> <span class="kn">import</span> <span class="n">Section</span>
<span class="kn">from</span> <span class="nn">.hdu.table</span> <span class="kn">import</span> <span class="n">new_table</span>
<span class="kn">from</span> <span class="nn">.header</span> <span class="kn">import</span> <span class="n">Header</span>
<span class="kn">from</span> <span class="nn">.verify</span> <span class="kn">import</span> <span class="n">VerifyError</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">(</span><span class="n">card</span><span class="o">.</span><span class="n">__all__</span> <span class="o">+</span> <span class="n">column</span><span class="o">.</span><span class="n">__all__</span> <span class="o">+</span> <span class="n">convenience</span><span class="o">.</span><span class="n">__all__</span> <span class="o">+</span>
<span class="n">hdu</span><span class="o">.</span><span class="n">__all__</span> <span class="o">+</span>
<span class="p">[</span><span class="s">'FITS_record'</span><span class="p">,</span> <span class="s">'FITS_rec'</span><span class="p">,</span> <span class="s">'GroupData'</span><span class="p">,</span> <span class="s">'open'</span><span class="p">,</span> <span class="s">'Section'</span><span class="p">,</span>
<span class="s">'new_table'</span><span class="p">,</span> <span class="s">'Header'</span><span class="p">,</span> <span class="s">'VerifyError'</span><span class="p">,</span>
<span class="s">'EXTENSION_NAME_CASE_SENSITIVE'</span><span class="p">,</span> <span class="s">'USE_MEMMAP'</span><span class="p">,</span>
<span class="s">'ENABLE_RECORD_VALUED_KEYWORD_CARDS'</span><span class="p">])</span>
</pre></div>
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