Typeerror: incompatible index of inserted column with frame index

TypeError: Incompatible index of inserted column with frame index

The “TypeError: Incompatible index of inserted column with frame index” error occurs when trying to insert a column into a pandas DataFrame with an incompatible index.

This error often arises when you are attempting to insert a column that has a different length or index labels than the existing DataFrame object.

Examples:

1. Example 1:

   Let’s say we have an existing DataFrame with three columns:

           
   import pandas as pd
   
   data = {'Name': ['John', 'Mike', 'Sarah'],
           'Age': [28, 32, 34],
           'City': ['New York', 'London', 'Paris']}
   
   df = pd.DataFrame(data)
   print(df)
           
         

   The output will be:

           
      Name  Age      City
   0  John   28  New York
   1  Mike   32    London
   2 Sarah   34     Paris
           
         

   If we try to insert a new column with a different index length, we will encounter the “TypeError: Incompatible index of inserted column with frame index” error:

           
   new_column = pd.Series([1, 2, 3, 4])  # Different length than the existing DataFrame
   
   df['New Column'] = new_column
           
         

   The error message will be:

           
   TypeError: Incompatible index of inserted column with frame index
           
         

   In this example, the length of the “new_column” Series is four, while the length of the existing DataFrame is three. This mismatch causes the error.

2. Example 2:

   Another scenario is when the index of the new column does not match the index of the DataFrame.

           
   import pandas as pd
   
   data = {'Name': ['John', 'Mike', 'Sarah'],
           'Age': [28, 32, 34],
           'City': ['New York', 'London', 'Paris']}
   
   df = pd.DataFrame(data)
   print(df)
           
         

   The output will be:

           
      Name  Age      City
   0  John   28  New York
   1  Mike   32    London
   2 Sarah   34     Paris
           
         

   Let’s try to insert a new column with a different set of index labels:

           
   new_column = pd.Series([100, 200, 300], index=[1, 2, 3])  # Incompatible index labels
   
   df['New Column'] = new_column
           
         

   The error message will be:

           
   TypeError: Incompatible index of inserted column with frame index
           
         

   In this example, the index labels of the “new_column” Series do not match the index labels of the DataFrame. This mismatch causes the error.

To fix this error, ensure that the column you are trying to insert has a compatible length and index labels with the existing DataFrame. Make sure both lengths are the same, and the index labels match.