Splitting on last delimiter in Python string

Question

What s the recommended Python idiom for splitting a string on the last occurrence of the delimiter in the string  example     instead of regular split  gt  gt  s    a b c d   gt  gt  s split       gt  gt    a    b    c    d        split only on last occurrence of     in string   gt  gt  gt  s mysplit s  -1   gt  gt  gt    a b c    d     mysplit takes a second argument that is the occurrence of the delimiter to be split  Like in regular list indexing  -1 means the last from the end  How can this be done

User · Answer

You can use rsplit   string rsplit  delimeter  1  1    To get the string from reverse

User · Answer

Use  rsplit    or  rpartition   instead   s rsplit      1  s rpartition        str rsplit   lets you specify how many times to split  while str rpartition   only splits once but always returns a fixed number of elements  prefix  delimiter  amp  postfix  and is faster for the single split case   Demo    gt  gt  gt  s    a b c d   gt  gt  gt  s rsplit      1    a b c    d    gt  gt  gt  s rsplit      2    a b    c    d    gt  gt  gt  s rpartition        a b c         d     Both methods start splitting from the right-hand-side of the string  by giving str rsplit   a maximum as the second argument  you get to split just the right-hand-most occurrences

User · Answer

I just did this for fun       gt  gt  gt  s    a b c d       gt  gt  gt   item   -1  for item in s   -1  split      1     -1        a b c    d     Caution  Refer to the first comment in below where this answer can go wrong

[python] Splitting on last delimiter in Python string?

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