2012/10/21 Vincent Davis <vinc...@vincentdavis.net>: > I am looking for a good way to get every pair from a string. For example, > input: > x = 'apple' > output > 'ap' > 'pp' > 'pl' > 'le' > > I am not seeing a obvious way to do this without multiple for loops, but > maybe there is not :-) > In the end I am going to what to get triples, quads....... also. > > Thanks > Vincent > > > -- > http://mail.python.org/mailman/listinfo/python-list >
Hi, just another - probably less canonical - approach using the new regex library could be (assuming the input sequence is always a string): >>> import regex # http://pypi.python.org/pypi/regex >>> regex.findall("..", "abcdefghijklm", overlapped=True) ['ab', 'bc', 'cd', 'de', 'ef', 'fg', 'gh', 'hi', 'ij', 'jk', 'kl', 'lm'] >>> regex.findall("...", "abcdefghijklm", overlapped=True) ['abc', 'bcd', 'cde', 'def', 'efg', 'fgh', 'ghi', 'hij', 'ijk', 'jkl', 'klm'] >>> If the newline \n could appear in the text, an appropriate pattern would be e.g. "(?s)..." regards, vbr -- http://mail.python.org/mailman/listinfo/python-list
