how to remove the column names in pandas code example

Example 1: how to drop a column by name in pandas

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

Example 2: remove name of a column

M
      a b c
1[1,] 1 4 7
2[2,] 2 5 8
3[3,] 3 6 9

row.names(M)<- NULL ; colnames(M)<- NULL
M

     [,1] [,2] [,3]
[1,]    1    4    7
[2,]    2    5    8
[3,]    3    6    9