Python Pandas: ValueError: Must have equal len keys and value when setting with an iterable
Question
I have a DataFrame that I want to change using
df.loc[rowId,colId] = myDict
to assign a dict to the entry [rowId,colId]. As a result I get following error:
ValueError: Must have equal len keys and value when setting with an iterable
Setting
df.loc[rowId,colId] = 0
works, In my pinion the style to assign the value in the first approach is the right one? so what is wrong?
1 answers
solution1
1 ACCPTED 2020-05-05 06:08:02
It is possible by adding list :
df.loc[rowId,colId] = [myDict]
But for better performance in pandas is best working in pandas only with scalars.
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