Without regex:
s = "20160204094836A"
year = s[:4]
day = s[4:6]
month = s[6:8]
print(year, day, month)
With Regex:
import re
s = "20160204094836A"
result = re.search(r"^(\d{4})(\d{2})(\d{2})", s)
year = int(result.group(1))
day = int(result.group(2))
month = int(result.group(3))
print(year, day, month)
solved date extraction through regex [closed]