eta.pop.html)
      * [ polars.Expr.meta.tree_format ](../../expressions/api/polars.Expr.meta.tree_format.html)
      * [ polars.Expr.meta.root_names ](../../expressions/api/polars.Expr.meta.root_names.html)
      * [ polars.Expr.meta.serialize ](../../expressions/api/polars.Expr.meta.serialize.html)
      * [ polars.Expr.meta.undo_aliases ](../../expressions/api/polars.Expr.meta.undo_aliases.html)
      * [ polars.Expr.meta.write_json ](../../expressions/api/polars.Expr.meta.write_json.html)
    * [ Miscellaneous ](../../expressions/miscellaneous.html) __
      * [ polars.Expr.deserialize ](../../expressions/api/polars.Expr.deserialize.html)
      * [ polars.Expr.from_json ](../../expressions/api/polars.Expr.from_json.html)
      * [ polars.Expr.set_sorted ](../../expressions/api/polars.Expr.set_sorted.html)
    * [ Name ](../../expressions/name.html) __
      * [ polars.Expr.name.keep ](../../expressions/api/polars.Expr.name.keep.html)
      * [ polars.Expr.name.map ](../../expressions/api/polars.Expr.name.map.html)
      * [ polars.Expr.name.prefix ](../../expressions/api/polars.Expr.name.prefix.html)
      * [ polars.Expr.name.suffix ](../../expressions/api/polars.Expr.name.suffix.html)
      * [ polars.Expr.name.to_lowercase ](../../expressions/api/polars.Expr.name.to_lowercase.html)
      * [ polars.Expr.name.to_uppercase ](../../expressions/api/polars.Expr.name.to_uppercase.html)
      * [ polars.Expr.name.map_fields ](../../expressions/api/polars.Expr.name.map_fields.html)
      * [ polars.Expr.name.prefix_fields ](../../expressions/api/polars.Expr.name.prefix_fields.html)
      * [ polars.Expr.name.suffix_fields ](../../expressions/api/polars.Expr.name.suffix_fields.html)
    * [ Operators ](../../expressions/operators.html) __
      * [ polars.Expr.and_ ](../../expressions/api/polars.Expr.and_.html)
      * [ polars.Expr.or_ ](../../expressions/api/polars.Expr.or_.html)
      * [ polars.Expr.eq ](../../expressions/api/polars.Expr.eq.html)
      * [ polars.Expr.eq_missing ](../../expressions/api/polars.Expr.eq_missing.html)
      * [ polars.Expr.ge ](../../expressions/api/polars.Expr.ge.html)
      * [ polars.Expr.gt ](../../expressions/api/polars.Expr.gt.html)
      * [ polars.Expr.le ](../../expressions/api/polars.Expr.le.html)
      * [ polars.Expr.lt ](../../expressions/api/polars.Expr.lt.html)
      * [ polars.Expr.ne ](../../expressions/api/polars.Expr.ne.html)
      * [ polars.Expr.ne_missing ](../../expressions/api/polars.Expr.ne_missing.html)
      * [ polars.Expr.add ](../../expressions/api/polars.Expr.add.html)
      * [ polars.Expr.floordiv ](../../expressions/api/polars.Expr.floordiv.html)
      * [ polars.Expr.mod ](../../expressions/api/polars.Expr.mod.html)
      * [ polars.Expr.mul ](../../expressions/api/polars.Expr.mul.html)
      * [ polars.Expr.neg ](../../expressions/api/polars.Expr.neg.html)
      * [ polars.Expr.sub ](../../expressions/api/polars.Expr.sub.html)
      * [ polars.Expr.truediv ](../../expressions/api/polars.Expr.truediv.html)
      * [ polars.Expr.pow ](../../expressions/api/polars.Expr.pow.html)
      * [ polars.Expr.xor ](../../expressions/api/polars.Expr.xor.html)
    * [ String ](../../expressions/string.html) __
      * [ polars.Expr.str.concat ](../../expressions/api/polars.Expr.str.concat.html)
      * [ polars.Expr.str.contains ](../../expressions/api/polars.Expr.str.contains.html)
      * [ polars.Expr.str.contains_any ](../../expressions/api/polars.Expr.str.contains_any.html)
      * [ polars.Expr.str.count_match ](../../expressions/api/polars.Expr.str.count_match.html)
      * [ polars.Expr.str.count_matches ](../../expressions/api/polars.Expr.str.count_matches.html)
      * [ polars.Expr.str.decode ](../../expressions/api/polars.Expr.str.decode.html)
      * [ polars.Expr.str.encode ](../../expressions/api/polars.Expr.str.encode.html)
      * [ polars.Expr.str.ends_with ](../../expressions/api/polars.Expr.str.ends_with.html)
      * [ polars.Expr.str.explode ](../../ex