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from collections.abc import Iterable
def make_hashable(value):
"""
Attempt to make value hashable or raise a TypeError if it fails.
The returned value should generate the same hash for equal values.
"""
if isinstance(value, dict):
return tuple(
[
(key, make_hashable(nested_value))
for key, nested_value in sorted(value.items())
]
)
# Try hash to avoid converting a hashable iterable (e.g. string, frozenset)
# to a tuple.
try:
hash(value)
except TypeError:
if isinstance(value, Iterable):
return tuple(map(make_hashable, value))
# Non-hashable, non-iterable.
raise
return value
|
