No need for dictionnary, simple list index is enough

6/6_2.py

@@ -7,7 +7,7 @@ def parse_file(file):
 
     list_state = [int(x) for x in line.split(',')]
 
-    state = dict(zip(range(0, 9), [0]*9))
+    state = [0] * 9
     for c in range(0, 9):
         state[c] = list_state.count(c)
 
@@ -36,8 +36,4 @@ DAYS = 256
 for d in range(DAYS):
     iterate(init_state)
 
-lanternfish = 0
-for k, v in init_state.items():
-    lanternfish += v
-
-print(f'There\'s {lanternfish} lanternfish after {DAYS} days')
+print(f'There\'s {sum(init_state)} lanternfish after {DAYS} days')