python split by number of characters code example
Example 1: how ot split a string every fourth eter
>>> line = '1234567890'
>>> n = 2
>>> [line[i:i+n] for i in range(0, len(line), n)]
['12', '34', '56', '78', '90']
Example 2: python convert strings to chunks
s = '1234567890'
o = []
while s:
o.append(s[:2])
s = s[2:]