|
=={{header|Python}}==
{{works with|Python|2.5}}
Setup
strstring = 'I"This amis a string '"▼
if re.search( r'string$', strstring): ▼Test
print "Ends with 'string '." ▼
strstring = re.sub( r'" a '", '" another '", strstring) ▼▲ if re.search(r'string$', str):
print "Ends with 'string'"</lang>
Test, storing the compiled regular expression in a variable
regex = re.compile(r'string$')
if regex.search(str):
▲ print "Ends with 'string'"
To find all matches rather than just the first match, use re.findall rather than re.search.
Substitute
▲ str = re.sub(r' a ', ' another ', str)
All instances of the specified pattern are replaced. To limit the number of instances replaced, specify the fourth argument to sub, the maximum number of replacements. To make a case-insensitive replacement, place (?i) at the beginning of the regular expression.
Substitute, storing the compiled regular expression in a variable
regex = re.compile(r' a ')
str = regex.sub(' another ', str)
'''Note:''' re.match() and regex.match() imply a "^" at the beginning of the regular expression. re.search() and regex.search() do not.
=={{header|Raven}}==
|