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<title>Debugging with GDB: gdb.prompt</title>
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<a name="gdb_002eprompt"></a>
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<p>
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Previous: <a href="gdb_002etypes.html#gdb_002etypes" accesskey="p" rel="previous">gdb.types</a>, Up: <a href="Python-modules.html#Python-modules" accesskey="u" rel="up">Python modules</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
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<a name="gdb_002eprompt-1"></a>
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<h4 class="subsubsection">23.2.4.3 gdb.prompt</h4>
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<a name="index-gdb_002eprompt"></a>
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<p>This module provides a method for prompt value-substitution.
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</p>
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<dl compact="compact">
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<dt><code>substitute_prompt (<var>string</var>)</code></dt>
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<dd><p>Return <var>string</var> with escape sequences substituted by values. Some
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escape sequences take arguments. You can specify arguments inside
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“{}” immediately following the escape sequence.
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</p>
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<p>The escape sequences you can pass to this function are:
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</p>
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<dl compact="compact">
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<dt><code>\\</code></dt>
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<dd><p>Substitute a backslash.
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</p></dd>
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<dt><code>\e</code></dt>
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<dd><p>Substitute an ESC character.
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</p></dd>
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<dt><code>\f</code></dt>
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<dd><p>Substitute the selected frame; an argument names a frame parameter.
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</p></dd>
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<dt><code>\n</code></dt>
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<dd><p>Substitute a newline.
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</p></dd>
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<dt><code>\p</code></dt>
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<dd><p>Substitute a parameter’s value; the argument names the parameter.
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</p></dd>
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<dt><code>\r</code></dt>
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<dd><p>Substitute a carriage return.
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</p></dd>
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<dt><code>\t</code></dt>
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<dd><p>Substitute the selected thread; an argument names a thread parameter.
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</p></dd>
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<dt><code>\v</code></dt>
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<dd><p>Substitute the version of GDB.
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</p></dd>
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<dt><code>\w</code></dt>
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<dd><p>Substitute the current working directory.
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</p></dd>
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<dt><code>\[</code></dt>
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<dd><p>Begin a sequence of non-printing characters. These sequences are
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typically used with the ESC character, and are not counted in the string
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length. Example: “\[\e[0;34m\](gdb)\[\e[0m\]” will return a
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blue-colored “(gdb)” prompt where the length is five.
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</p></dd>
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<dt><code>\]</code></dt>
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<dd><p>End a sequence of non-printing characters.
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</p></dd>
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</dl>
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<p>For example:
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</p>
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<div class="smallexample">
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<pre class="smallexample">substitute_prompt ("frame: \f, args: \p{print frame-arguments}")
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</pre></div>
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<p>will return the string:
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</p>
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<div class="smallexample">
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<pre class="smallexample">"frame: main, args: scalars"
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</pre></div>
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</dd>
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</dl>
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