whats does pipeline used in pyhton

1import math
2import os
3import random
4import re
5import sys
6
7
8
9if __name__ == '__main__':
10    n = int(raw_input().strip())
11    
12    if (n % 2) == 0 & (2 < n < 6) & (n>20):
13        print ("not weird" )
14        
15    elif (n % 2) == 1 & (6 < n < 20):
16        print ("weird")
17    
18    else :
19        print ("weird")
20    
21
22
23