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I tried to create a function that reads my file and the column I want it to read:

def read_row(file, column):
   main_df = np.array([])
   for df in pd.read_csv(file, chunksize = 100000):
     column_name = df.column.unique()
     main_df = np.append(main_df,column_name)
return(main_df)

However it shows AttributeError: 'DataFrame' object has no attribute 'column'. What should I put instead of column in df.column.unique()?

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  • It's a bit unclear what your variables are trying to achieve. Is column a string or an integer? If column was an integer and you're actually tring to get the column name it would be column_name = df.columns[column]. If that's not the case, you should consider adjusting your variable names. Commented Jan 25, 2022 at 8:48

1 Answer 1

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Use brackets [] instead dot notation:

column_name = df[column].unique()
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