awips2/pythonPackages/scientific/Doc/Reference/Scientific.IO.NetCDF.NetCDFVariable-class.html
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<a href="Scientific.IO-module.html">Package&nbsp;IO</a> ::
<a href="Scientific.IO.NetCDF-module.html">Module&nbsp;NetCDF</a> ::
Class&nbsp;NetCDFVariable
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class NetCDFVariable</h1><p class="nomargin-top"></p>
<p>Variable in a netCDF file</p>
<p>NetCDFVariable objects are constructed by calling the method
'createVariable' on the <a
href="Scientific.IO.NetCDF.NetCDFFile-class.html"
class="link">NetCDFFile</a> object.</p>
<p>NetCDFVariable objects behave much like array objects defined in
module Numeric, except that their data resides in a file. Data is read by
indexing and written by assigning to an indexed subset; the entire array
can be accessed by the index '[:]' or using the methods 'getValue' and
'assignValue'. NetCDFVariable objects also have attribute
&quot;shape&quot; with the same meaning as for arrays, but the shape
cannot be modified. There is another read-only attribute
&quot;dimensions&quot;, whose value is the tuple of dimension names.</p>
<p>All other attributes correspond to variable attributes defined in the
netCDF file. Variable attributes are created by assigning to an attribute
of the NetCDFVariable object.</p>
<p><b>Note:</b> If a file open for reading is simultaneously written by
another program, the size of the unlimited dimension may change. Every
time the shape of a variable is requested, the current size will be
obtained from the file. For reading and writing, the size obtained during
the last shape request is used. This ensures consistency: foo[-1] means
the same thing no matter how often it is evaluated, as long as the shape
is not re-evaluated in between.</p>
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<span class="summary-type">&nbsp;</span>
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<td><span class="summary-sig"><a name="__init__"></a><span class="summary-sig-name">__init__</span>(<span class="summary-sig-arg">self</span>,
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<td><span class="summary-sig"><a href="Scientific.IO.NetCDF.NetCDFVariable-class.html#assignValue" class="summary-sig-name">assignValue</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">value</span>)</span><br />
Assign a new value to the variable.</td>
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<span class="summary-type">&nbsp;</span>
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<td><span class="summary-sig"><a href="Scientific.IO.NetCDF.NetCDFVariable-class.html#getValue" class="summary-sig-name">getValue</a>(<span class="summary-sig-arg">self</span>)</span><br />
Return the value of the variable.</td>
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<span class="summary-type"><code>str</code></span>
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<td><span class="summary-sig"><a href="Scientific.IO.NetCDF.NetCDFVariable-class.html#typecode" class="summary-sig-name">typecode</a>(<span class="summary-sig-arg">self</span>)</span><br />
Returns:
the variable's type code</td>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">assignValue</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">value</span>)</span>
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<p>Assign a new value to the variable. This method allows assignment to
scalar variables, which cannot be indexed.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>value</code></strong> - the new value for the variable</li>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">getValue</span>(<span class="sig-arg">self</span>)</span>
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>&nbsp;
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<p>Return the value of the variable. This method allows access to scalar
variables, which cannot be indexed.</p>
<dl class="fields">
<dt>Returns:</dt>
<dd>the current value of the variable</dd>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">typecode</span>(<span class="sig-arg">self</span>)</span>
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>&nbsp;
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<dl class="fields">
<dt>Returns: <code>str</code></dt>
<dd>the variable's type code</dd>
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