get length of an integer python

1len(str(n))  #n is a number

1len(str(133))

1# Below uses constant space (converting to string and then gettings it's length does not)
2num = 12362
3count = 0
4while num > 0:
5  count += 1
6  num = num // 10
7print(count)
8
9# for negative numbers, take absolue value first:
10num = -12362
11num = abs(num)
12count = 0
13while num > 0:
14  count += 1
15  num = num // 10
16print(count)

1number_length =  lambda s: len(str(s)) #number length without recursion
2
3#number length with recursion
4numlen = 1
5def num_len(s):
6  if s > 9:
7    numlen += 1
8  else:
9    s = numlen
10    numlen = 0
11    return s
12  return num_len(s//10)