Compiled regular-expression and match objects. : match « Regular Expressions « Python Tutorial

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Python Tutorial » Regular Expressions » match 
16.4.4.Compiled regular-expression and match objects.
import re

testString = "Hello world"
formatString = "%-35s: %s"   # string for formatting the output

expression = "Hello"
compiledExpression = re.compileexpression 

print formatString % "The expression", expression )
print formatString % "The compiled expression",compiledExpression )

print formatString % "Non-compiled search",re.searchexpression, testString ) )
print formatString % "Compiled search",compiledExpression.searchtestString ) )

print formatString % "search SRE_Match contains",re.searchexpression, testString ).group() )
print formatString % "compiled search SRE_Match contains",compiledExpression.searchtestString ).group() )
16.4.match
16.4.1.Matching Strings with match()
16.4.2.Here is an example of a failed match where None is returned:
16.4.3.Repetition, Special Characters, and Grouping
16.4.4.Compiled regular-expression and match objects.
16.4.5.Repetition patterns, matching vs searching.
16.4.6.classes and special sequences.
16.4.7.Dig out path
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