subprocess command fails

[Brad s]

Time adjustment error:

# python3.4 timefix.py
2015022105
2015-02-21 05:00:00
Traceback (most recent call last):
  File "timefix.py", line 15, in <module>
    ndate = datetime.datetime.strptime(timeadd, '%Y%m%d%H')
TypeError: must be str, not datetime.datetime



# cat timefix.py
#!/usr/bin/python3.4
import subprocess
import sys
from datetime import datetime
import datetime
from time import gmtime, strftime

pretime = strftime("%Y%m%d%H", gmtime())
time = datetime.datetime.strptime(pretime,'%Y%m%d%H')
print(pretime)
print (time)
plustime = datetime.timedelta(days=730)
timeadd = (time + plustime)
str(timeadd)
ndate = datetime.datetime.strptime(timeadd, '%Y%m%d%H')
#timeadd = timeadd.replace(tzinfo=UTC())
print (timeadd)
print (ndate)