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vincent schouten
9,687 PointsDon't quite understand the use of re.Multiline
I am not sure if I understand the concept of re.M correctly. I guess somebody uses re.Multiline to create multiple strings out of one big string. What is the need for a caret and a dollar sign? A caret specifies the beginning and the dollar the end of the string. But with re.M, every line is a string and we should not have to specify the beginning and the end of that string as it is already determined by re.M. Can somebody tell me whether I am right or wrong?
string = '''Love, Kenneth: 20 /nChalkley, Andrew: 25 /nMcFarland, Dave: 10'''
players = re.search(r''' ^(?P[\w]+) ,\s (?P[\w]+) :\s (?P[\d{2}])$ ''', string, re.X|re.M)
print(players.group()) ## gives AttributeError
1 Answer
Kenneth Love
Treehouse Guest TeacherOK, let's look at a string:
my_string = """1apple1234
2banana5678
3coconut9012"""
If I want to catch only the numbers at the end of each line, I have to use re.MULTILINE because my string has multiple lines in it and I want to treat each line as its own string for the sake of my pattern.
>>> re.match(r'\d+$', my_string, re.M)
1234
If I leave off the re.M, I'll get a totally different, and undesired, result.
>>> re.match(r'\d+$', my_string)
9012
vincent schouten
9,687 Pointsvincent schouten
9,687 PointsHi Kenneth, your explaination is highly appreciated. Thank you.