Removing N/A from table in Python with none – 'NoneType' object has no attribute 'where'
Question:
I have a table in python with multiple columns with N/A and i want to replace those with None or blank if possible. I have tried many ways but i got all the time this message :
'NoneType' object has no attribute 'where'
I have tried this :
main = main_df.where(pd.notnull(df), None)
print(main)
and also tried this :
main = main_df.fillna('', inplace=True)
and this :
main = main_df.replace(np.nan, '', regex=True)
print(main)
Whatever i am trying the messege is the same : ‘NoneType’ object has no attribute ‘where’ or ‘replace’
Do you have any idea how should i do that ? I am desperate to fix this . Appreciate all the help ! Thanks a lot !
Answers:
The problem is not caused here – the error you’re given, means that the value of main_df is None.
The easiest way to detect what is causing the problem is to use print(main_df) whenever it’s changed (including the line where it’s first declared), and see where it starts to be None
If you read the error message, it tells you that main_df, which is of type NoneType does not have where attribute.
This is probably because you have done something like this:
main_df = main_df.some_function(inplace=True)
See, pandas methods with inplace=True don’t return anything. Just remove this argument and it should work
I have a table in python with multiple columns with N/A and i want to replace those with None or blank if possible. I have tried many ways but i got all the time this message :
'NoneType' object has no attribute 'where'
I have tried this :
main = main_df.where(pd.notnull(df), None)
print(main)
and also tried this :
main = main_df.fillna('', inplace=True)
and this :
main = main_df.replace(np.nan, '', regex=True)
print(main)
Whatever i am trying the messege is the same : ‘NoneType’ object has no attribute ‘where’ or ‘replace’
Do you have any idea how should i do that ? I am desperate to fix this . Appreciate all the help ! Thanks a lot !
The problem is not caused here – the error you’re given, means that the value of main_df is None.
The easiest way to detect what is causing the problem is to use print(main_df) whenever it’s changed (including the line where it’s first declared), and see where it starts to be None
If you read the error message, it tells you that main_df, which is of type NoneType does not have where attribute.
This is probably because you have done something like this:
main_df = main_df.some_function(inplace=True)
See, pandas methods with inplace=True don’t return anything. Just remove this argument and it should work