Documentation/Source/eric5.Plugins.CheckerPlugins.Tabnanny.Tabnanny.html

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<h1>eric5.Plugins.CheckerPlugins.Tabnanny.Tabnanny</h1>
<p>
The Tab Nanny despises ambiguous indentation.  She knows no mercy.
</p><p>
tabnanny -- Detection of ambiguous indentation
</p><p>
For the time being this module is intended to be called as a script.
However it is possible to import it into an IDE and use the function
check() described below.
</p><p>
Warning: The API provided by this module is likely to change in future
releases; such changes may not be backward compatible.
</p><p>
This is a modified version to make the original tabnanny better suitable
for being called from within the eric5 IDE.
</p><dl>
<dt>Raises <b>ValueError</b>:</dt>
<dd>
The tokenize module is too old.
</dd>
</dl>
<h3>Global Attributes</h3>
<table>
<tr><td>__all__</td></tr><tr><td>__version__</td></tr>
</table>
<h3>Classes</h3>
<table>
<tr>
<td><a href="#NannyNag">NannyNag</a></td>
<td>Class implementing an exception for indentation issues.</td>
</tr><tr>
<td><a href="#Whitespace">Whitespace</a></td>
<td>Class implementing the whitespace checker.</td>
</tr>
</table>
<h3>Functions</h3>
<table>
<tr>
<td><a href="#check">check</a></td>
<td>Private function to check one Python source file for whitespace related problems.</td>
</tr><tr>
<td><a href="#format_witnesses">format_witnesses</a></td>
<td>Function to format the witnesses as a readable string.</td>
</tr><tr>
<td><a href="#process_tokens">process_tokens</a></td>
<td>Function processing all tokens generated by a tokenizer run.</td>
</tr>
</table>
<hr /><hr />
<a NAME="NannyNag" ID="NannyNag"></a>
<h2>NannyNag</h2>
<p>
    Class implementing an exception for indentation issues.
</p><p>
    Raised by tokeneater() if detecting an ambiguous indent.
    Captured and handled in check().
</p>
<h3>Derived from</h3>
Exception
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#NannyNag.__init__">NannyNag</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#NannyNag.get_line">get_line</a></td>
<td>Method to retrieve the offending line.</td>
</tr><tr>
<td><a href="#NannyNag.get_lineno">get_lineno</a></td>
<td>Method to retrieve the line number.</td>
</tr><tr>
<td><a href="#NannyNag.get_msg">get_msg</a></td>
<td>Method to retrieve the message.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="NannyNag.__init__" ID="NannyNag.__init__"></a>
<h4>NannyNag (Constructor)</h4>
<b>NannyNag</b>(<i>lineno, msg, line</i>)
<p>
        Constructor
</p><dl>
<dt><i>lineno</i></dt>
<dd>
Line number of the ambiguous indent.
</dd><dt><i>msg</i></dt>
<dd>
Descriptive message assigned to this problem.
</dd><dt><i>line</i></dt>
<dd>
The offending source line.
</dd>
</dl><a NAME="NannyNag.get_line" ID="NannyNag.get_line"></a>
<h4>NannyNag.get_line</h4>
<b>get_line</b>(<i></i>)
<p>
        Method to retrieve the offending line.
</p><dl>
<dt>Returns:</dt>
<dd>
The line of code (string)
</dd>
</dl><a NAME="NannyNag.get_lineno" ID="NannyNag.get_lineno"></a>
<h4>NannyNag.get_lineno</h4>
<b>get_lineno</b>(<i></i>)
<p>
        Method to retrieve the line number.
</p><dl>
<dt>Returns:</dt>
<dd>
The line number (integer)
</dd>
</dl><a NAME="NannyNag.get_msg" ID="NannyNag.get_msg"></a>
<h4>NannyNag.get_msg</h4>
<b>get_msg</b>(<i></i>)
<p>
        Method to retrieve the message.
</p><dl>
<dt>Returns:</dt>
<dd>
The error message (string)
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="Whitespace" ID="Whitespace"></a>
<h2>Whitespace</h2>
<p>
    Class implementing the whitespace checker.
</p>
<h3>Derived from</h3>
object
<h3>Class Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#Whitespace.__init__">Whitespace</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#Whitespace.equal">equal</a></td>
<td>Method to compare the indentation levels of two Whitespace objects for equality.</td>
</tr><tr>
<td><a href="#Whitespace.indent_level">indent_level</a></td>
<td>Method to determine the indentation level.</td>
</tr><tr>
<td><a href="#Whitespace.less">less</a></td>
<td>Method to compare the indentation level against another Whitespace objects to be smaller.</td>
</tr><tr>
<td><a href="#Whitespace.longest_run_of_spaces">longest_run_of_spaces</a></td>
<td>Method to calculate the length of longest contiguous run of spaces.</td>
</tr><tr>
<td><a href="#Whitespace.not_equal_witness">not_equal_witness</a></td>
<td>Method to calculate a tuple of witnessing tab size.</td>
</tr><tr>
<td><a href="#Whitespace.not_less_witness">not_less_witness</a></td>
<td>Method to calculate a tuple of witnessing tab size.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="Whitespace.__init__" ID="Whitespace.__init__"></a>
<h4>Whitespace (Constructor)</h4>
<b>Whitespace</b>(<i>ws</i>)
<p>
        Constructor
</p><dl>
<dt><i>ws</i></dt>
<dd>
The string to be checked.
</dd>
</dl><a NAME="Whitespace.equal" ID="Whitespace.equal"></a>
<h4>Whitespace.equal</h4>
<b>equal</b>(<i>other</i>)
<p>
        Method to compare the indentation levels of two Whitespace objects for
        equality.
</p><dl>
<dt><i>other</i></dt>
<dd>
Whitespace object to compare against.
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
True, if we compare equal against the other Whitespace object.
</dd>
</dl><a NAME="Whitespace.indent_level" ID="Whitespace.indent_level"></a>
<h4>Whitespace.indent_level</h4>
<b>indent_level</b>(<i>tabsize</i>)
<p>
        Method to determine the indentation level.
</p><dl>
<dt><i>tabsize</i></dt>
<dd>
The length of a tab stop. (integer)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
indentation level (integer)
</dd>
</dl><a NAME="Whitespace.less" ID="Whitespace.less"></a>
<h4>Whitespace.less</h4>
<b>less</b>(<i>other</i>)
<p>
        Method to compare the indentation level against another Whitespace
        objects to be smaller.
</p><dl>
<dt><i>other</i></dt>
<dd>
Whitespace object to compare against.
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
True, if we compare less against the other Whitespace object.
</dd>
</dl><a NAME="Whitespace.longest_run_of_spaces" ID="Whitespace.longest_run_of_spaces"></a>
<h4>Whitespace.longest_run_of_spaces</h4>
<b>longest_run_of_spaces</b>(<i></i>)
<p>
        Method to calculate the length of longest contiguous run of spaces.
</p><dl>
<dt>Returns:</dt>
<dd>
The length of longest contiguous run of spaces (whether or not
            preceding a tab)
</dd>
</dl><a NAME="Whitespace.not_equal_witness" ID="Whitespace.not_equal_witness"></a>
<h4>Whitespace.not_equal_witness</h4>
<b>not_equal_witness</b>(<i>other</i>)
<p>
        Method to calculate a tuple of witnessing tab size.
</p><p>
        Intended to be used after not self.equal(other) is known, in which
        case it will return at least one witnessing tab size.
</p><dl>
<dt><i>other</i></dt>
<dd>
Whitespace object to calculate against.
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
A list of tuples (ts, i1, i2) such that
            i1 == self.indent_level(ts) != other.indent_level(ts) == i2.
</dd>
</dl><a NAME="Whitespace.not_less_witness" ID="Whitespace.not_less_witness"></a>
<h4>Whitespace.not_less_witness</h4>
<b>not_less_witness</b>(<i>other</i>)
<p>
        Method to calculate a tuple of witnessing tab size.
</p><p>
        Intended to be used after not self.less(other is known, in which
        case it will return at least one witnessing tab size.
</p><dl>
<dt><i>other</i></dt>
<dd>
Whitespace object to calculate against.
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
A list of tuples (ts, i1, i2) such that
            i1 == self.indent_level(ts) >= other.indent_level(ts) == i2.
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="check" ID="check"></a>
<h2>check</h2>
<b>check</b>(<i>file, text=""</i>)
<p>
    Private function to check one Python source file for whitespace related
    problems.
</p><dl>
<dt><i>file</i></dt>
<dd>
source filename (string)
</dd><dt><i>text</i></dt>
<dd>
source text (string)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
A tuple indicating status (True = an error was found), the
        filename, the linenumber and the error message
        (boolean, string, string, string). The values are only
        valid, if the status is True.
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="format_witnesses" ID="format_witnesses"></a>
<h2>format_witnesses</h2>
<b>format_witnesses</b>(<i>w</i>)
<p>
    Function to format the witnesses as a readable string.
</p><dl>
<dt><i>w</i></dt>
<dd>
A list of witnesses
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
A formated string of the witnesses.
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
<hr /><hr />
<a NAME="process_tokens" ID="process_tokens"></a>
<h2>process_tokens</h2>
<b>process_tokens</b>(<i>tokens</i>)
<p>
    Function processing all tokens generated by a tokenizer run.
</p><dl>
<dt><i>tokens</i></dt>
<dd>
list of tokens
</dd>
</dl><dl>
<dt>Raises <b>NannyNag</b>:</dt>
<dd>
raised to indicate an indentation error
</dd>
</dl>
<div align="right"><a href="#top">Up</a></div>
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