2b 3d python

1# There is no ++ in Python, use instead:
2number += 1

1>>> a = 10
2>>> a += 5
3>>> a
415
5

1i += 1

1In [1]: x = [2, 3, 4]    
2In [2]: y = x    
3In [3]: x += 7, 8, 9    
4In [4]: x
5Out[4]: [2, 3, 4, 7, 8, 9]    
6In [5]: y
7Out[5]: [2, 3, 4, 7, 8, 9]    
8In [6]: x += [44, 55]    
9In [7]: x
10Out[7]: [2, 3, 4, 7, 8, 9, 44, 55]    
11In [8]: y
12Out[8]: [2, 3, 4, 7, 8, 9, 44, 55]    
13In [9]: x = x + [33, 22]    
14In [10]: x
15Out[10]: [2, 3, 4, 7, 8, 9, 44, 55, 33, 22]    
16In [11]: y
17Out[11]: [2, 3, 4, 7, 8, 9, 44, 55]
18