[Solved] python, count characters in last line string [closed]

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Split the string from the end(str.rsplit) only once and get the length of last item:

>>> s = """AAAAAAA
 BBBB
    CCCCC
         DDD"""

>>> s.rsplit('\n', 1)
['AAAAAAA\n BBBB\n    CCCCC', '         DDD']
#On the other hand simple str.split will split the string more than once:
>>> s.split('\n')
['AAAAAAA', ' BBBB', '    CCCCC', '         DDD']

Now simply get the length of last item:

>>> len(s.rsplit('\n', 1)[-1])
12

With bigger data this is going to be extremely fast:

>>> s = """AAAAAAA
 BBBB
    CCCCC
         DDD"""
>>> s="\n".join([s]*1000)  #4000 lines
>>> %timeit len(s.split('\n')[-1])
10000 loops, best of 3: 84.9 µs per loop
>>> %timeit len(s.splitlines()[-1])
10000 loops, best of 3: 91.3 µs per loop
>>> %timeit len(s.rsplit('\n', 1)[-1])
1000000 loops, best of 3: 1.62 µs per loop

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solved python, count characters in last line string [closed]