how to delete a column from a dataframe in python

df.drop('column_name', axis=1, inplace=True)

df = df.drop(df.columns[[0, 1, 3]], axis=1)

df = df.drop(df.columns[[0, 1, 3]], axis=1)  # df.columns is zero-based pd.Index 
df.drop(['column_nameA', 'column_nameB'], axis=1, inplace=True)

del df['column']

del df['column_name'] #to remove a column from dataframe

del df['column_name']

del df['column_name']