I am trying to copy values from one column to another using the following:
df1999['H31C'] = df1999['H31B']
However I am getting this value error:
ValueError: Wrong number of items passed 2, placement implies 1
Any idea why this is happening?
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1What is the contents of 'df1999'? – Morteza Jun 15 '21 at 22:07
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@Morteza it's quite a large pandas dataframe – validid Jun 15 '21 at 22:15
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1The error is basically saying you're trying to copy 2 columns into 1 column. Take a look at https://stackoverflow.com/a/43216241/7924381. – Morteza Jun 15 '21 at 22:19
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1`df1999['H31B']` is probably a dataframe with 2 columns instead of just being 1 column. you likely have duplicate column names – Asish M. Jun 15 '21 at 22:20