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Class GetExpression

python/pathway/internals/expression.py:1090–1123  ·  view source on GitHub ↗

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1088
1089
1090class GetExpression(ColumnExpression):
1091 _object: ColumnExpression
1092 _index: ColumnExpression
1093 _default: ColumnExpression
1094 _check_if_exists: bool
1095 _const_index: int | str | None
1096
1097 def __init__(
1098 self,
1099 object: ColumnExpression,
1100 index: ColumnExpression | int | str,
1101 default: ColumnExpression | Value = None,
1102 check_if_exists=True,
1103 ) -> None:
1104 super().__init__()
1105 self._object = object
1106 self._index = ColumnExpression._wrap(index)
1107 self._default = ColumnExpression._wrap(default)
1108 self._check_if_exists = check_if_exists
1109 if isinstance(self._index, ColumnConstExpression) and isinstance(
1110 self._index._val, (int, str)
1111 ):
1112 self._const_index = self._index._val
1113 else:
1114 self._const_index = None
1115
1116 def _to_internal(self) -> InternalColExpr:
1117 return InternalColExpr.build(
1118 type(self), self._object, self._index, self._default, self._check_if_exists
1119 )
1120
1121 @property
1122 def _deps(self) -> tuple[ColumnExpression, ...]:
1123 return (self._object, self._index, self._default)
1124
1125
1126ReturnTypeFunType = Callable[[tuple[Any, ...]], Any]

Callers 2

__getitem__Method · 0.85
getMethod · 0.85

Calls

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Tested by

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