Python ProgrammingRegular Expression | Python regular expression replace string
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Pythonincludesamoduleforworkingwithregularexpressionsonstrings.FormoreinformationaboutwritingregularexpressionsandsyntaxnotspecifictoPython,seetheregularexpressions[1]wikibook.PythonsregularexpressionsyntaxissimilartoPerls[2]TostartusingregularexpressionsinyourPythonscripts,importthe"re"module:RegularexpressionfunctionsinPythonataglance:importreifre.search("l+","Hello"):print1#Substringmatchsufficesifnotre.match("ell.","Hello"):print2#Thebeginningofthestringhastomatchifre.match(".el","Hello"...
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Python includes a module for working with regular expressions on strings. For more information about writing regular expressions and syntax not specific to Python, see the regular expressions[1] wikibook. Pythons regular expression syntax is similar to Perls[2]
To start using regular expressions in your Python scripts, import the "re" module:
Regular expression functions in Python at a glance:
import re if re.search("l+","Hello"): print 1 # Substring match suffices if not re.match("ell.","Hello"): print 2 # The beginning of the string has to match if re.match(".el","Hello"): print 3 if re.match("he..o","Hello",re.I): print 4 # Case-insensitive match print re.sub("l+", "l", "Hello") # Prints "Helo"; replacement AKA substitution print re.sub(r"(.*)1", r"1", "HeyHey") # Prints "Hey"; backreference print re.sub("EY", "ey", "HEy", flags=re.I) # Prints "Hey"; case-insensitive sub print re.sub(r"(?i)EY", r"ey", "HEy") # Prin...取得本站獨家住宿推薦 15%OFF 訂房優惠
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