fantom = 2
spisok = [1,2,7,55,2,78,4,67,2,3,2,25,2]
res = 0
for i in spisok:
    if i == fantom:
          res += 1
print(res)

print(spisok.count(fantom))

 # -*- coding: utf-8 -*-
symbol = '5'
spisok = [1, 2, 7, 55, 2, 78, 4, 67, 2, 3, 2, 25, 2]
result = ''.join(str(e) for e in spisok)
print(result.count(symbol))

 l = ['a', 'b', 'c']
ll = ''.join(l)
print(ll)
abc

 s = 'one two tree'
ss = s.split()
print(ss)
['one', 'two', 'tree']

 fantom = '5'
spisok = ['1','2','555','55','25','78','525','2']
res = 0
for i in ''.join(spisok):
    if i == fantom:
          res += 1
print(res)
 >>> 8

 print(''.join(spisok).count(fantom))
>>> 8

  
>>> def count_char(seq, ch):
...      return sum(i.count(ch) for i in seq)
... 
>>> lst = ['abc', 'def', 'aab', 'ghi', '1a2']
>>> 
>>> count_char(lst, 'a')
4
>>> count_char(lst, 'e')
1
>>> count_char(lst, 'x')
0
>>>