Study Notes (17): Python Interview 100 talking about (based Python3.x) - using regular expressions to determine whether a string contains a date ...

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match match:

s='today is 2010-07-08'

m = re.match ( '* \ d {4} -. \ d {2} -. \ d {2} *', s). # where * represents multiple characters, \ d (4) represent 4 characters .

if m is not None :

    print(m.group())