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<div class="section" id="idle">
<span id="id1"></span><h1>24.5. IDLE<a class="headerlink" href="#idle" title="Permalink to this headline">¶</a></h1>
<p id="index-386">IDLE is the Python IDE built with the <tt class="xref docutils literal"><span class="pre">tkinter</span></tt> GUI toolkit.</p>
<p>IDLE has the following features:</p>
<ul class="simple">
<li>coded in 100% pure Python, using the <tt class="xref docutils literal"><span class="pre">tkinter</span></tt> GUI toolkit</li>
<li>cross-platform: works on Windows and Unix</li>
<li>multi-window text editor with multiple undo, Python colorizing and many other
features, e.g. smart indent and call tips</li>
<li>Python shell window (a.k.a. interactive interpreter)</li>
<li>debugger (not complete, but you can set breakpoints, view and step)</li>
</ul>
<div class="section" id="menus">
<h2>24.5.1. Menus<a class="headerlink" href="#menus" title="Permalink to this headline">¶</a></h2>
<div class="section" id="file-menu">
<h3>24.5.1.1. File menu<a class="headerlink" href="#file-menu" title="Permalink to this headline">¶</a></h3>
<dl class="docutils">
<dt>New window</dt>
<dd>create a new editing window</dd>
<dt>Open...</dt>
<dd>open an existing file</dd>
<dt>Open module...</dt>
<dd>open an existing module (searches sys.path)</dd>
<dt>Class browser</dt>
<dd>show classes and methods in current file</dd>
<dt>Path browser</dt>
<dd>show sys.path directories, modules, classes and methods</dd>
</dl>
<dl class="docutils" id="index-387">
<dt>Save</dt>
<dd>save current window to the associated file (unsaved windows have a * before and
after the window title)</dd>
<dt>Save As...</dt>
<dd>save current window to new file, which becomes the associated file</dd>
<dt>Save Copy As...</dt>
<dd>save current window to different file without changing the associated file</dd>
<dt>Close</dt>
<dd>close current window (asks to save if unsaved)</dd>
<dt>Exit</dt>
<dd>close all windows and quit IDLE (asks to save if unsaved)</dd>
</dl>
</div>
<div class="section" id="edit-menu">
<h3>24.5.1.2. Edit menu<a class="headerlink" href="#edit-menu" title="Permalink to this headline">¶</a></h3>
<dl class="docutils">
<dt>Undo</dt>
<dd>Undo last change to current window (max 1000 changes)</dd>
<dt>Redo</dt>
<dd>Redo last undone change to current window</dd>
<dt>Cut</dt>
<dd>Copy selection into system-wide clipboard; then delete selection</dd>
<dt>Copy</dt>
<dd>Copy selection into system-wide clipboard</dd>
<dt>Paste</dt>
<dd>Insert system-wide clipboard into window</dd>
<dt>Select All</dt>
<dd>Select the entire contents of the edit buffer</dd>
<dt>Find...</dt>
<dd>Open a search dialog box with many options</dd>
<dt>Find again</dt>
<dd>Repeat last search</dd>
<dt>Find selection</dt>
<dd>Search for the string in the selection</dd>
<dt>Find in Files...</dt>
<dd>Open a search dialog box for searching files</dd>
<dt>Replace...</dt>
<dd>Open a search-and-replace dialog box</dd>
<dt>Go to line</dt>
<dd>Ask for a line number and show that line</dd>
<dt>Indent region</dt>
<dd>Shift selected lines right 4 spaces</dd>
<dt>Dedent region</dt>
<dd>Shift selected lines left 4 spaces</dd>
<dt>Comment out region</dt>
<dd>Insert ## in front of selected lines</dd>
<dt>Uncomment region</dt>
<dd>Remove leading # or ## from selected lines</dd>
<dt>Tabify region</dt>
<dd>Turns <em>leading</em> stretches of spaces into tabs</dd>
<dt>Untabify region</dt>
<dd>Turn <em>all</em> tabs into the right number of spaces</dd>
<dt>Expand word</dt>
<dd>Expand the word you have typed to match another word in the same buffer; repeat
to get a different expansion</dd>
<dt>Format Paragraph</dt>
<dd>Reformat the current blank-line-separated paragraph</dd>
<dt>Import module</dt>
<dd>Import or reload the current module</dd>
<dt>Run script</dt>
<dd>Execute the current file in the __main__ namespace</dd>
</dl>
</div>
<div class="section" id="windows-menu">
<span id="index-388"></span><h3>24.5.1.3. Windows menu<a class="headerlink" href="#windows-menu" title="Permalink to this headline">¶</a></h3>
<dl class="docutils">
<dt>Zoom Height</dt>
<dd>toggles the window between normal size (24x80) and maximum height.</dd>
</dl>
<p>The rest of this menu lists the names of all open windows; select one to bring
it to the foreground (deiconifying it if necessary).</p>
</div>
<div class="section" id="debug-menu-in-the-python-shell-window-only">
<h3>24.5.1.4. Debug menu (in the Python Shell window only)<a class="headerlink" href="#debug-menu-in-the-python-shell-window-only" title="Permalink to this headline">¶</a></h3>
<dl class="docutils">
<dt>Go to file/line</dt>
<dd>look around the insert point for a filename and linenumber, open the file, and
show the line.</dd>
<dt>Open stack viewer</dt>
<dd>show the stack traceback of the last exception</dd>
<dt>Debugger toggle</dt>
<dd>Run commands in the shell under the debugger</dd>
<dt>JIT Stack viewer toggle</dt>
<dd>Open stack viewer on traceback</dd>
</dl>
</div>
</div>
<div class="section" id="basic-editing-and-navigation">
<span id="index-389"></span><h2>24.5.2. Basic editing and navigation<a class="headerlink" href="#basic-editing-and-navigation" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li><tt class="docutils literal"><span class="pre">Backspace</span></tt> deletes to the left; <tt class="docutils literal"><span class="pre">Del</span></tt> deletes to the right</li>
<li>Arrow keys and <tt class="docutils literal"><span class="pre">Page</span> <span class="pre">Up</span></tt>/<tt class="docutils literal"><span class="pre">Page</span> <span class="pre">Down</span></tt> to move around</li>
<li><tt class="docutils literal"><span class="pre">Home</span></tt>/<tt class="docutils literal"><span class="pre">End</span></tt> go to begin/end of line</li>
<li><tt class="docutils literal"><span class="pre">C-Home</span></tt>/<tt class="docutils literal"><span class="pre">C-End</span></tt> go to begin/end of file</li>
<li>Some <strong>Emacs</strong> bindings may also work, including <tt class="docutils literal"><span class="pre">C-B</span></tt>,
<tt class="docutils literal"><span class="pre">C-P</span></tt>, <tt class="docutils literal"><span class="pre">C-A</span></tt>, <tt class="docutils literal"><span class="pre">C-E</span></tt>, <tt class="docutils literal"><span class="pre">C-D</span></tt>, <tt class="docutils literal"><span class="pre">C-L</span></tt></li>
</ul>
<div class="section" id="automatic-indentation">
<h3>24.5.2.1. Automatic indentation<a class="headerlink" href="#automatic-indentation" title="Permalink to this headline">¶</a></h3>
<p>After a block-opening statement, the next line is indented by 4 spaces (in the
Python Shell window by one tab). After certain keywords (break, return etc.)
the next line is dedented. In leading indentation, <tt class="docutils literal"><span class="pre">Backspace</span></tt> deletes up
to 4 spaces if they are there. <tt class="docutils literal"><span class="pre">Tab</span></tt> inserts 1-4 spaces (in the Python
Shell window one tab). See also the indent/dedent region commands in the edit
menu.</p>
</div>
<div class="section" id="python-shell-window">
<h3>24.5.2.2. Python Shell window<a class="headerlink" href="#python-shell-window" title="Permalink to this headline">¶</a></h3>
<ul class="simple">
<li><tt class="docutils literal"><span class="pre">C-C</span></tt> interrupts executing command</li>
<li><tt class="docutils literal"><span class="pre">C-D</span></tt> sends end-of-file; closes window if typed at a <tt class="docutils literal"><span class="pre">>>></span></tt> prompt</li>
<li><tt class="docutils literal"><span class="pre">Alt-p</span></tt> retrieves previous command matching what you have typed</li>
<li><tt class="docutils literal"><span class="pre">Alt-n</span></tt> retrieves next</li>
<li><tt class="docutils literal"><span class="pre">Return</span></tt> while on any previous command retrieves that command</li>
<li><tt class="docutils literal"><span class="pre">Alt-/</span></tt> (Expand word) is also useful here</li>
</ul>
</div>
</div>
<div class="section" id="syntax-colors">
<span id="index-390"></span><h2>24.5.3. Syntax colors<a class="headerlink" href="#syntax-colors" title="Permalink to this headline">¶</a></h2>
<p>The coloring is applied in a background “thread,” so you may occasionally see
uncolorized text. To change the color scheme, edit the <tt class="docutils literal"><span class="pre">[Colors]</span></tt> section in
<tt class="docutils literal"><span class="pre">config.txt</span></tt>.</p>
<dl class="docutils">
<dt>Python syntax colors:</dt>
<dd><dl class="first last docutils">
<dt>Keywords</dt>
<dd>orange</dd>
<dt>Strings</dt>
<dd>green</dd>
<dt>Comments</dt>
<dd>red</dd>
<dt>Definitions</dt>
<dd>blue</dd>
</dl>
</dd>
<dt>Shell colors:</dt>
<dd><dl class="first last docutils">
<dt>Console output</dt>
<dd>brown</dd>
<dt>stdout</dt>
<dd>blue</dd>
<dt>stderr</dt>
<dd>dark green</dd>
<dt>stdin</dt>
<dd>black</dd>
</dl>
</dd>
</dl>
</div>
<div class="section" id="startup">
<h2>24.5.4. Startup<a class="headerlink" href="#startup" title="Permalink to this headline">¶</a></h2>
<p>Upon startup with the <tt class="docutils literal"><span class="pre">-s</span></tt> option, IDLE will execute the file referenced by
the environment variables <span class="target" id="index-391"></span><strong class="xref">IDLESTARTUP</strong> or <span class="target" id="index-392"></span><a class="reference external" href="../using/cmdline.html#envvar-PYTHONSTARTUP"><strong class="xref">PYTHONSTARTUP</strong></a>.
Idle first checks for <tt class="docutils literal"><span class="pre">IDLESTARTUP</span></tt>; if <tt class="docutils literal"><span class="pre">IDLESTARTUP</span></tt> is present the file
referenced is run. If <tt class="docutils literal"><span class="pre">IDLESTARTUP</span></tt> is not present, Idle checks for
<tt class="docutils literal"><span class="pre">PYTHONSTARTUP</span></tt>. Files referenced by these environment variables are
convenient places to store functions that are used frequently from the Idle
shell, or for executing import statements to import common modules.</p>
<p>In addition, <tt class="docutils literal"><span class="pre">Tk</span></tt> also loads a startup file if it is present. Note that the
Tk file is loaded unconditionally. This additional file is <tt class="docutils literal"><span class="pre">.Idle.py</span></tt> and is
looked for in the user’s home directory. Statements in this file will be
executed in the Tk namespace, so this file is not useful for importing functions
to be used from Idle’s Python shell.</p>
<div class="section" id="command-line-usage">
<h3>24.5.4.1. Command line usage<a class="headerlink" href="#command-line-usage" title="Permalink to this headline">¶</a></h3>
<div class="highlight-python"><pre>idle.py [-c command] [-d] [-e] [-s] [-t title] [arg] ...
-c command run this command
-d enable debugger
-e edit mode; arguments are files to be edited
-s run $IDLESTARTUP or $PYTHONSTARTUP first
-t title set title of shell window</pre>
</div>
<p>If there are arguments:</p>
<ol class="arabic simple">
<li>If <em class="xref">-e</em> is used, arguments are files opened for editing and
<tt class="docutils literal"><span class="pre">sys.argv</span></tt> reflects the arguments passed to IDLE itself.</li>
<li>Otherwise, if <a class="reference external" href="../using/cmdline.html#cmdoption-c"><em class="xref">-c</em></a> is used, all arguments are placed in
<tt class="docutils literal"><span class="pre">sys.argv[1:...]</span></tt>, with <tt class="docutils literal"><span class="pre">sys.argv[0]</span></tt> set to <tt class="docutils literal"><span class="pre">'-c'</span></tt>.</li>
<li>Otherwise, if neither <em class="xref">-e</em> nor <a class="reference external" href="../using/cmdline.html#cmdoption-c"><em class="xref">-c</em></a> is used, the first
argument is a script which is executed with the remaining arguments in
<tt class="docutils literal"><span class="pre">sys.argv[1:...]</span></tt> and <tt class="docutils literal"><span class="pre">sys.argv[0]</span></tt> set to the script name. If the script
name is ‘-‘, no script is executed but an interactive Python session is started;
the arguments are still available in <tt class="docutils literal"><span class="pre">sys.argv</span></tt>.</li>
</ol>
</div>
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<h3><a href="../contents.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference external" href="#">24.5. IDLE</a><ul>
<li><a class="reference external" href="#menus">24.5.1. Menus</a><ul>
<li><a class="reference external" href="#file-menu">24.5.1.1. File menu</a></li>
<li><a class="reference external" href="#edit-menu">24.5.1.2. Edit menu</a></li>
<li><a class="reference external" href="#windows-menu">24.5.1.3. Windows menu</a></li>
<li><a class="reference external" href="#debug-menu-in-the-python-shell-window-only">24.5.1.4. Debug menu (in the Python Shell window only)</a></li>
</ul>
</li>
<li><a class="reference external" href="#basic-editing-and-navigation">24.5.2. Basic editing and navigation</a><ul>
<li><a class="reference external" href="#automatic-indentation">24.5.2.1. Automatic indentation</a></li>
<li><a class="reference external" href="#python-shell-window">24.5.2.2. Python Shell window</a></li>
</ul>
</li>
<li><a class="reference external" href="#syntax-colors">24.5.3. Syntax colors</a></li>
<li><a class="reference external" href="#startup">24.5.4. Startup</a><ul>
<li><a class="reference external" href="#command-line-usage">24.5.4.1. Command line usage</a></li>
</ul>
</li>
</ul>
</li>
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