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Correct SExp.to hints to handle inheritance #106

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Correct SExp.to hints to handle inheritance #106

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4 changes: 3 additions & 1 deletion clvm/SExp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -117,6 +117,8 @@ def to_sexp_type(
return stack[0]


_T_SExp = typing.TypeVar("_T_SExp", bound="SExp")

class SExp:
"""
SExp provides higher level API on top of any object implementing the CLVM
Expand Down Expand Up @@ -173,7 +175,7 @@ def as_bin(self):
return f.getvalue()

@classmethod
def to(class_, v: CastableType) -> "SExp":
def to(class_: typing.Type[_T_SExp], v: CastableType) -> _T_SExp:
if isinstance(v, class_):
return v

Expand Down