>>> print(uptime_string)
1 day, 19:33:09.030000
>>> def colon_split(a):
... if a.count(":") == 1:
... return a.split(":")[0]
... else:
... return ":".join(a.split(":", 2)[:2])
... colon_split(uptime_string)
File "<stdin>", line 6
colon_split(uptime_string)
^
SyntaxError: invalid syntax