How can I modify this code?

Question

from itertools import product
for d in product(range(10), repeat=4):
   if 7 in d :
      print(d)

This is supposed to print all numbers that have number 7, but what if I want the number that contains exactly one 7?

Possible duplicate of [How to count the occurrences of a list item?](https://stackoverflow.com/questions/2600191/how-to-count-the-occurrences-of-a-list-item) — Chris_Rands, Nov 17 '17 at 11:25

Reblochon Masque · Accepted Answer · 2017-11-17T11:34:20.387

0

Here is one approach:

for each d count the number of 7s, and select the ones that contain exactly one. (thanks @MrXcoder for the assist in the comments)

from itertools import product 
for d in product(range(10), repeat=4):
    if d.count(7) == 1:
        print(d)

edited Nov 17 '17 at 11:34

answered Nov 17 '17 at 11:27

Reblochon Masque

1

Isn't this overly complicated when you could just do `if d.count(7) == 1`? – Mr. Xcoder Nov 17 '17 at 11:32

1 Answers1