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<H2><A NAME="SECTION006110000000000000000">
4.1.1 String constants</A>
</H2>

<P>
The constants defined in this module are:

<P>
<dl><dt><b><tt id='l2h-818' xml:id='l2h-818'>ascii_letters</tt></b></dt>
<dd>
  The concatenation of the <tt class="constant">ascii_lowercase</tt> and
  <tt class="constant">ascii_uppercase</tt> constants described below.  This value is
  not locale-dependent.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-819' xml:id='l2h-819'>ascii_lowercase</tt></b></dt>
<dd>
  The lowercase letters <code>'abcdefghijklmnopqrstuvwxyz'</code>.  This
  value is not locale-dependent and will not change.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-820' xml:id='l2h-820'>ascii_uppercase</tt></b></dt>
<dd>
  The uppercase letters <code>'ABCDEFGHIJKLMNOPQRSTUVWXYZ'</code>.  This
  value is not locale-dependent and will not change.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-821' xml:id='l2h-821'>digits</tt></b></dt>
<dd>
  The string <code>'0123456789'</code>.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-822' xml:id='l2h-822'>hexdigits</tt></b></dt>
<dd>
  The string <code>'0123456789abcdefABCDEF'</code>.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-823' xml:id='l2h-823'>letters</tt></b></dt>
<dd>
  The concatenation of the strings <tt class="constant">lowercase</tt> and
  <tt class="constant">uppercase</tt> described below.  The specific value is
  locale-dependent, and will be updated when
  <tt class="function">locale.setlocale()</tt> is called.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-824' xml:id='l2h-824'>lowercase</tt></b></dt>
<dd>
  A string containing all the characters that are considered lowercase
  letters.  On most systems this is the string
  <code>'abcdefghijklmnopqrstuvwxyz'</code>.  Do not change its definition --
  the effect on the routines <tt class="function">upper()</tt> and
  <tt class="function">swapcase()</tt> is undefined.  The specific value is
  locale-dependent, and will be updated when
  <tt class="function">locale.setlocale()</tt> is called.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-825' xml:id='l2h-825'>octdigits</tt></b></dt>
<dd>
  The string <code>'01234567'</code>.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-826' xml:id='l2h-826'>punctuation</tt></b></dt>
<dd>
  String of ASCII characters which are considered punctuation
  characters in the "<tt class="samp">C</tt>" locale.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-827' xml:id='l2h-827'>printable</tt></b></dt>
<dd>
  String of characters which are considered printable.  This is a
  combination of <tt class="constant">digits</tt>, <tt class="constant">letters</tt>,
  <tt class="constant">punctuation</tt>, and <tt class="constant">whitespace</tt>.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-828' xml:id='l2h-828'>uppercase</tt></b></dt>
<dd>
  A string containing all the characters that are considered uppercase
  letters.  On most systems this is the string
  <code>'ABCDEFGHIJKLMNOPQRSTUVWXYZ'</code>.  Do not change its definition --
  the effect on the routines <tt class="function">lower()</tt> and
  <tt class="function">swapcase()</tt> is undefined.  The specific value is
  locale-dependent, and will be updated when
  <tt class="function">locale.setlocale()</tt> is called.
</dd></dl>

<P>
<dl><dt><b><tt id='l2h-829' xml:id='l2h-829'>whitespace</tt></b></dt>
<dd>
  A string containing all characters that are considered whitespace.
  On most systems this includes the characters space, tab, linefeed,
  return, formfeed, and vertical tab.  Do not change its definition --
  the effect on the routines <tt class="function">strip()</tt> and <tt class="function">split()</tt>
  is undefined.
</dd></dl>

<P>

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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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