Python编程：dateutil模块parser从字符串中解析出时间对象

以下是python3的代码

from dateutil import parser

time_str = "2018 9 03"
dtime = parser.parse(time_str)
print(dtime, type(dtime))
# 2018-09-03 00:00:00 

time_str = "2018/9/03"
dtime = parser.parse(time_str)
print(dtime, type(dtime))
# 2018-09-03 00:00:00 

time_str = "2018-9-03"
dtime = parser.parse(time_str)
print(dtime, type(dtime))
# 2018-09-03 00:00:00 

time_str = "2018-9-03 23:23:9"
dtime = parser.parse(time_str)
print(dtime, type(dtime))
# 2018-09-03 23:23:09