8000 PERF: Allow str.split callers to skip expensive post-processing by wbadart · Pull Request #35223 · pandas-dev/pandas · GitHub
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PERF: Allow str.split callers to skip expensive post-processing #35223

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PERF: Allow str.split callers to skip expensive post-processing #35223

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60cc735
Inline cons_row
wbadart Jul 10, 2020
7b1caaa
Allow split caller to skip expand's sequence padding
wbadart Jul 10, 2020
06505c0
Apply black formatting
wbadart Jul 10, 2020
ae81973
Corrected placement of pad_sequences documentation
wbadart Jul 10, 2020
cd233bc
Fix pad_sequences logic
wbadart Jul 10, 2020
e242615
Add example of pad_sequences usage to split docs
wbadart Jul 10, 2020
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Add example of pad_sequences usage to split docs
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@wbadart
wbadart committed Jul 10, 2020
commit e242615a2927f2335e3a115ab5e9be1082a9cc7b
15 changes: 15 additions & 0 deletions pandas/core/strings.py
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Expand Up @@ -2686,6 +2686,21 @@ def cat(self, others=None, sep=None, na_rep=None, join="left"):
>>> s.str.split(r"\+|=", expand=True)
0 1 2
0 1 1 2

When using ``expand=True``, if you have already verified that the
particular split will result in sequences of uniform length, you may opt
out of the (sometimes expensive) length normalzation process with
``pad_sequences=False``.

>>> s = pd.Series(["foo bar", "baz qaz"])
>>> s
0 foo bar
1 baz qaz
dtype: object
>>> s.str.split(expand=True, pad_sequences=False)
0 1
0 foo bar
1 baz qaz
"""

@Appender(_shared_docs["str_split"] % {"side": "beginning", "method": "split"})
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