Splitting on first occurrence

Question

What would be the best way to split a string on the first occurrence of a delimiter   For example    123mango abcd mango kiwi peach    splitting on the first mango to get    abcd mango kiwi peach

User · Answer

For me the better approach is that   s split  mango   1  -1       because if happens that occurrence is not in the string you ll get  IndexError  list index out of range    Therefore -1 will not get any harm cause number of occurrences is already set to one

User · Answer

gt  gt  gt  s    123mango abcd mango kiwi peach   gt  gt  gt  s split  mango   1    123     abcd mango kiwi peach    gt  gt  gt  s split  mango   1  1    abcd mango kiwi peach

User · Answer

From the docs   str split  sep   maxsplit    Return a list of the words in the string  using sep as the delimiter string  If maxsplit is given  at most maxsplit splits are done  thus  the list will have at most maxsplit 1 elements    s split  mango   1  1

User · Answer

df columnname 1  split      1    This will split data with the first occurrence of     in the string or data frame column value

User · Answer

You can also use str partition    gt  gt  gt  text    123mango abcd mango kiwi peach    gt  gt  gt  text partition  mango     123    mango     abcd mango kiwi peach     gt  gt  gt  text partition  mango   -1    abcd mango kiwi peach    gt  gt  gt  text partition  mango   -1  lstrip      if whitespace strip-ing is needed  abcd mango kiwi peach    The advantage of using str partition is that it s always gonna return a tuple in the form     lt pre gt    lt separator gt    lt post gt     So this makes unpacking the output really flexible as there s always going to be 3 elements in the resulting tuple

[python] Splitting on first occurrence

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