polars.Expr.str.to_titlecase

Expr.str.to_titlecase() → Expr

Modify strings to their titlecase equivalent.

Notes

This is a form of case transform where the first letter of each word is capitalized, with the rest of the word in lowercase. Non-alphanumeric characters define the word boundaries.

Examples

>>> df = pl.DataFrame(
...     {
...         "quotes": [
...             "'e.t. phone home'",
...             "you talkin' to me?",
...             "to infinity,and BEYOND!",
...         ]
...     }
... )
>>> df.with_columns(
...     quotes_title=pl.col("quotes").str.to_titlecase(),
... )
shape: (3, 2)
┌─────────────────────────┬─────────────────────────┐
│ quotes                  ┆ quotes_title            │
│ ---                     ┆ ---                     │
│ str                     ┆ str                     │
╞═════════════════════════╪═════════════════════════╡
│ 'e.t. phone home'       ┆ 'E.T. Phone Home'       │
│ you talkin' to me?      ┆ You Talkin' To Me?      │
│ to infinity,and BEYOND! ┆ To Infinity,And Beyond! │
└─────────────────────────┴─────────────────────────┘