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BUG: DataFrame.loc/iloc fails to update object with new dtype GH24269 #24383

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BUG: DataFrame.loc/iloc fails to update object with new dtype GH24269 #24383

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49df896
BUG: DataFrame.loc/iloc fails to update object with new dtype GH24269
Dec 21, 2018
a78c4b6
Fixing line indent and line length
slnguyen Dec 21, 2018
1ea92e7
updating indent
slnguyen Dec 21, 2018
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11 changes: 11 additions & 0 deletions pandas/core/indexing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -630,6 +630,17 @@ def can_do_equal_len():
self.obj[item_labels[indexer[info_axis]]] = value
return

if isinstance(value, ABCDataFrame):
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this is very complicated and likely does not belong here. you would need to heavily comment this and explain line by line.

if (len(indexer) > info_axis and
(is_integer(indexer[info_axis]) or
isinstance(indexer[info_axis], np.ndarray)) and
all(com.is_null_slice(idx)
for i, idx in enumerate(indexer)
if i != info_axis) and
item_labels.is_unique):
self.obj[item_labels[indexer[info_axis]]] = value
return

if isinstance(value, (ABCSeries, dict)):
# TODO(EA): ExtensionBlock.setitem this causes issues with
# setting for extensionarrays that store dicts. Need to decide
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