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<div class="section" id="module-fpformat">
<h1>8.11. <tt class="xref docutils literal"><span class="pre">fpformat</span></tt> — Floating point conversions<a class="headerlink" href="#module-fpformat" title="Permalink to this headline">¶</a></h1>
<p class="deprecated">
<span class="versionmodified">Deprecated since version 2.6: </span>The <tt class="xref docutils literal"><span class="pre">fpformat</span></tt> module has been removed in Python 3.0.</p>
<p>The <tt class="xref docutils literal"><span class="pre">fpformat</span></tt> module defines functions for dealing with floating point
numbers representations in 100% pure Python.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">This module is unnecessary: everything here can be done using the <tt class="docutils literal"><span class="pre">%</span></tt> string
interpolation operator described in the <a class="reference external" href="stdtypes.html#string-formatting"><em>String Formatting Operations</em></a> section.</p>
</div>
<p>The <tt class="xref docutils literal"><span class="pre">fpformat</span></tt> module defines the following functions and an exception:</p>
<dl class="function">
<dt id="fpformat.fix">
<tt class="descclassname">fpformat.</tt><tt class="descname">fix</tt><big>(</big><em>x</em>, <em>digs</em><big>)</big><a class="headerlink" href="#fpformat.fix" title="Permalink to this definition">¶</a></dt>
<dd><p>Format <em>x</em> as <tt class="docutils literal"><span class="pre">[-]ddd.ddd</span></tt> with <em>digs</em> digits after the point and at least one
digit before. If <tt class="docutils literal"><span class="pre">digs</span> <span class="pre"><=</span> <span class="pre">0</span></tt>, the decimal point is suppressed.</p>
<p><em>x</em> can be either a number or a string that looks like one. <em>digs</em> is an
integer.</p>
<p>Return value is a string.</p>
</dd></dl>
<dl class="function">
<dt id="fpformat.sci">
<tt class="descclassname">fpformat.</tt><tt class="descname">sci</tt><big>(</big><em>x</em>, <em>digs</em><big>)</big><a class="headerlink" href="#fpformat.sci" title="Permalink to this definition">¶</a></dt>
<dd><p>Format <em>x</em> as <tt class="docutils literal"><span class="pre">[-]d.dddE[+-]ddd</span></tt> with <em>digs</em> digits after the point and
exactly one digit before. If <tt class="docutils literal"><span class="pre">digs</span> <span class="pre"><=</span> <span class="pre">0</span></tt>, one digit is kept and the point is
suppressed.</p>
<p><em>x</em> can be either a real number, or a string that looks like one. <em>digs</em> is an
integer.</p>
<p>Return value is a string.</p>
</dd></dl>
<dl class="exception">
<dt id="fpformat.NotANumber">
<em class="property">exception </em><tt class="descclassname">fpformat.</tt><tt class="descname">NotANumber</tt><a class="headerlink" href="#fpformat.NotANumber" title="Permalink to this definition">¶</a></dt>
<dd>Exception raised when a string passed to <a title="fpformat.fix" class="reference internal" href="#fpformat.fix"><tt class="xref docutils literal"><span class="pre">fix()</span></tt></a> or <a title="fpformat.sci" class="reference internal" href="#fpformat.sci"><tt class="xref docutils literal"><span class="pre">sci()</span></tt></a> as the <em>x</em>
parameter does not look like a number. This is a subclass of <a title="exceptions.ValueError" class="reference external" href="exceptions.html#exceptions.ValueError"><tt class="xref docutils literal"><span class="pre">ValueError</span></tt></a>
when the standard exceptions are strings. The exception value is the improperly
formatted string that caused the exception to be raised.</dd></dl>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="gp">>>> </span><span class="kn">import</span> <span class="nn">fpformat</span>
<span class="gp">>>> </span><span class="n">fpformat</span><span class="o">.</span><span class="n">fix</span><span class="p">(</span><span class="mf">1.23</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="go">'1.2'</span>
</pre></div>
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