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6 changes: 5 additions & 1 deletion pandas/core/generic.py
Original file line number Diff line number Diff line change
Expand Up @@ -7487,9 +7487,13 @@ def replace(
if inplace:
return None
return self.copy(deep=False)

if is_dict_like(to_replace):
if is_dict_like(value): # {'A' : NA} -> {'A' : 0}
if isinstance(self, ABCSeries):
raise ValueError(
"to_replace and value cannot be dict-like for "
"Series.replace"
)
# Note: Checking below for `in foo.keys()` instead of
# `in foo` is needed for when we have a Series and not dict
mapping = {
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9 changes: 9 additions & 0 deletions pandas/tests/series/methods/test_replace.py
Original file line number Diff line number Diff line change
Expand Up @@ -496,6 +496,15 @@ def test_replace_only_one_dictlike_arg(self, fixed_now_ts):
with pytest.raises(ValueError, match=msg):
ser.replace(to_replace, value)

def test_replace_dict_like_with_dict_like(self):
# GH 59452
s = pd.Series([1, 2, 3, 4, 5])
to_replace = pd.Series([1])
value = pd.Series([75])
msg = "to_replace and value cannot be dict-like for Series.replace"
with pytest.raises(ValueError, match=msg):
s.replace(to_replace, value)

def test_replace_extension_other(self, frame_or_series):
# https://github.com/pandas-dev/pandas/issues/34530
obj = frame_or_series(pd.array([1, 2, 3], dtype="Int64"))
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