Solve the n queen problem using Python

After reading the concise Python tutorial for one afternoon, I wrote the n queen'sProgramPlay. The program only uses basic functions. Record it here.

Def Isok (row, col ):
''' Is it possible that a queen is put at (row, col )? '''
For I In Range ( 1 , Row ):
If Col = Queen [I - 1 ] Or Col - Queen [I - 1 ] = Row - I Or Col - Queen [I - 1 ] = I - Row:
Return False
Return True
Def DFS (ROW ):
If Row = N + 1 :
Print Queen
Return
For I In Range ( 1 , N + 1 ):
If Isok (row, I ):
Queen. append (I)
DFS (row + 1 )
Queen. Pop ()
N = INT (raw_input ( ' Enter the number of Queens: ' ))
Queen = []
DFS ( 1 )