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@@ -483,7 +483,21 @@ class Var(Generic[VAR_TYPE]):
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_var_subclasses.append(VarSubclassEntry(cls, ToVarOperation, python_types))
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def __post_init__(self):
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- """Post-initialize the var."""
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+ """Post-initialize the var.
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+
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+ Raises:
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+ TypeError: If _js_expr is not a string.
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+ """
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+ if not isinstance(self._js_expr, str):
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+ raise TypeError(
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+ f"Expected _js_expr to be a string, got value {self._js_expr!r} of type {type(self._js_expr).__name__}"
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+ )
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+
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+ if self._var_data is not None and not isinstance(self._var_data, VarData):
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+ raise TypeError(
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+ f"Expected _var_data to be a VarData, got value {self._var_data!r} of type {type(self._var_data).__name__}"
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+ )
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+
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# Decode any inline Var markup and apply it to the instance
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_var_data, _js_expr = _decode_var_immutable(self._js_expr)
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Khaleel Al-Adhami