Python Rsplit Vs Split

I have actually a string in python. I want to break-up it via maxsplit = 1 on separator which is pretty cshed to end of the string.

You watching: Python rsplit vs split

For e.g.

a = "abcdefghijklmnopqrstuvwxyz,1".Will a.split(",", 1) be much better in regards to performance than a.rsplit(",",1)?


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Below is a time test making use of timeit.timeit to compare the speeds of the two methods:

P.S. Although, the str.split method is one much less character to form. :)


I"m super late to this party, but for anyone else stumbling throughout this, partition is faster than split(x, 1):


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I think tright here is a slight difference in between split() and also rsplit():for example:

str1 = "w,e,l,c,o,m,e"print(str1.split(",",2))str1 = "w,e,l,c,o,m,e"print(str1.rsplit(",",2))You see, split() is provided if you desire to separation strings on first occurrences and also rsplit() is supplied if you desire to break-up strings on last occurrences.


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Adding to the previous answers, making use of separation vs rseparation must depfinish on wbelow you want to search. Example:

$ python -m timeit ""abcdefghijklmnopqrstuvwxyz,sdfsgfkdjgherughieug,1".split(",")<2>"1000000 loops, finest of 3: 0.48 usec per loop$ python -m timeit ""abcdefghijklmnopqrstuvwxyz,sdfsgfkdjgherughieug,1".rsplit(",",1)<1>"1000000 loops, best of 3: 0.453 usec per loopHere you are looking for 1, in which instance making use of rsplit is much faster than separation, whereas for the examples in the previous answers, break-up is much faster.

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iCodez answer, you deserve to run a timing test from the command-line:

$ python -m timeit ""abcdefghijklmnopqrstuvwxyz,1".split(",", 1)"1000000 loops, ideal of 3: 0.321 usec per loop$ python -m timeit ""abcdefghijklmnopqrstuvwxyz,1".rsplit(",", 1)"1000000 loops, ideal of 3: 0.327 usec per loopSo, indeed, it"s an irrelevant difference.


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