python - drop a column

df.drop(['column_1', 'Column_2'], axis = 1, inplace = True) 

# axis=1 tells Python that we want to apply function on columns instead of rows
# To delete the column permanently from original dataframe df, we can use the option inplace=True
df.drop(['A'], axis=1, inplace=True)

df.drop(columns=['Unnamed: 0'])

df = df.drop(['B', 'C'], axis=1)

>>> df.drop(columns=['B', 'C'])
   A   D
0  0   3
1  4   7
2  8  11