polars.Expr.str.replace_many#

Expr.str.replace_many(
patterns: IntoExpr,
replace_with: IntoExpr,
*,
ascii_case_insensitive: bool = False,
) Expr[source]#

Use the aho-corasick algorithm to replace many matches.

Parameters:
patterns

String patterns to search and replace.

replace_with

Strings to replace where a pattern was a match. This can be broadcasted. So it supports many:one and many:many.

ascii_case_insensitive

Enable ASCII-aware case insensitive matching. When this option is enabled, searching will be performed without respect to case for ASCII letters (a-z and A-Z) only.

Examples

>>> _ = pl.Config.set_fmt_str_lengths(100)
>>> df = pl.DataFrame(
...     {
...         "lyrics": [
...             "Everybody wants to rule the world",
...             "Tell me what you want, what you really really want",
...             "Can you feel the love tonight",
...         ]
...     }
... )
>>> df.with_columns(
...     pl.col("lyrics")
...     .str.replace_many(
...         ["me", "you", "they"],
...         "",
...     )
...     .alias("removes_pronouns")
... )
shape: (3, 2)
┌────────────────────────────────────────────────────┬────────────────────────────────────────────┐
│ lyrics                                             ┆ removes_pronouns                           │
│ ---                                                ┆ ---                                        │
│ str                                                ┆ str                                        │
╞════════════════════════════════════════════════════╪════════════════════════════════════════════╡
│ Everybody wants to rule the world                  ┆ Everybody wants to rule the world          │
│ Tell me what you want, what you really really want ┆ Tell  what  want, what  really really want │
│ Can you feel the love tonight                      ┆ Can  feel the love tonight                 │
└────────────────────────────────────────────────────┴────────────────────────────────────────────┘
>>> df.with_columns(
...     pl.col("lyrics")
...     .str.replace_many(
...         ["me", "you"],
...         ["you", "me"],
...     )
...     .alias("confusing")
... )
shape: (3, 2)
┌────────────────────────────────────────────────────┬───────────────────────────────────────────────────┐
│ lyrics                                             ┆ confusing                                         │
│ ---                                                ┆ ---                                               │
│ str                                                ┆ str                                               │
╞════════════════════════════════════════════════════╪═══════════════════════════════════════════════════╡
│ Everybody wants to rule the world                  ┆ Everybody wants to rule the world                 │
│ Tell me what you want, what you really really want ┆ Tell you what me want, what me really really want │
│ Can you feel the love tonight                      ┆ Can me feel the love tonight                      │
└────────────────────────────────────────────────────┴───────────────────────────────────────────────────┘