Remove ... and show all columns in python pandas

Question

df is the database with 240 columns

 Col1   Col2 Col3  Col4 Col5  ...................Col239 Col240

Code

  [IN]df.columns
  [OUT] Index(['Col1', 'Col2', 'Col3', .........'Col239', 'Col240'])

I want the names of all the columns and no ..... Could not find the solution for python pandas on stack overflow

Answer:

pd.set_option('display.expand_frame_repr', False)

as mentioned in duplicate question also not working