Lines Matching refs:expressions

24 Regular expressions use the backslash character (``'\'``) to indicate
42 :ref:`compiled regular expressions <re-objects>`.  The functions are shortcuts
63 Regular expressions can be concatenated to form new regular expressions; if *A*
64 and *B* are both regular expressions, then *AB* is also a regular expression.
68 references.  Thus, complex expressions can easily be constructed from simpler
69 primitive expressions like the ones described here.  For details of the theory
70 and implementation of regular expressions, consult the Friedl book [Frie09]_,
73 A brief explanation of the format of regular expressions follows.  For further
76 Regular expressions can contain both special and ordinary characters. Most
78 expressions; they simply match themselves.  You can concatenate ordinary
85 how the regular expressions around them are interpreted.
96 .. index:: single: . (dot); in regular expressions
103 .. index:: single: ^ (caret); in regular expressions
109 .. index:: single: $ (dollar); in regular expressions
120 .. index:: single: * (asterisk); in regular expressions
127 .. index:: single: + (plus); in regular expressions
134 .. index:: single: ? (question mark); in regular expressions
141    single: *?; in regular expressions
142    single: +?; in regular expressions
143    single: ??; in regular expressions
155    single: {} (curly brackets); in regular expressions
178 .. index:: single: \ (backslash); in regular expressions
191    raw strings for all but the simplest expressions.
194    single: [] (square brackets); in regular expressions
202    .. index:: single: - (minus); in regular expressions
215    .. index:: single: \ (backslash); in regular expressions
221    .. index:: single: ^ (caret); in regular expressions
234    .. .. index:: single: --; in regular expressions
235    .. .. index:: single: &&; in regular expressions
236    .. .. index:: single: ~~; in regular expressions
237    .. .. index:: single: ||; in regular expressions
253 .. index:: single: | (vertical bar); in regular expressions
267    single: () (parentheses); in regular expressions
276 .. index:: single: (?; in regular expressions
299 .. index:: single: (?:; in regular expressions
333 .. index:: single: (?P<; in regular expressions
360 .. index:: single: (?P=; in regular expressions
366 .. index:: single: (?#; in regular expressions
371 .. index:: single: (?=; in regular expressions
378 .. index:: single: (?!; in regular expressions
385 .. index:: single: (?<=; in regular expressions
412 .. index:: single: (?<!; in regular expressions
435 .. index:: single: \ (backslash); in regular expressions
447 .. index:: single: \A; in regular expressions
452 .. index:: single: \b; in regular expressions
468 .. index:: single: \B; in regular expressions
479 .. index:: single: \d; in regular expressions
491 .. index:: single: \D; in regular expressions
498 .. index:: single: \s; in regular expressions
512 .. index:: single: \S; in regular expressions
519 .. index:: single: \w; in regular expressions
534 .. index:: single: \W; in regular expressions
543 .. index:: single: \Z; in regular expressions
549    single: \a; in regular expressions
550    single: \b; in regular expressions
551    single: \f; in regular expressions
552    single: \n; in regular expressions
553    single: \N; in regular expressions
554    single: \r; in regular expressions
555    single: \t; in regular expressions
556    single: \u; in regular expressions
557    single: \U; in regular expressions
558    single: \v; in regular expressions
559    single: \x; in regular expressions
560    single: \\; in regular expressions
596 regular expressions.  Most non-trivial applications always use the compiled
631       programs that use only a few regular expressions at a time needn't worry
632       about compiling regular expressions.
659    Perform case-insensitive matching; expressions like ``[A-Z]`` will also
719    .. index:: single: # (hash); in regular expressions
721    This flag allows you to write regular expressions that look nicer and are
879    .. index:: single: \g; in regular expressions
1298    was matched at all. For example, the expressions ``(a)b``, ``((a)(b))``, and
1395 expressions are generally more powerful, though also more verbose, than
1398 expressions.
1442 Python offers two different primitive operations based on regular expressions:
1453 Regular expressions beginning with ``'^'`` can be used with :func:`search` to
1580 Raw string notation (``r"text"``) keeps regular expressions sane.  Without it,
1608 The text categories are specified with regular expressions.  The technique is