将字符串转换为日期时间格式时格式不匹配

Question

我的目标是将字符串转换为日期时间格式。字符串格式为2020-10-02 09:00:00.000 我尝试了以下方法，但都给了我格式不匹配的错误。

timerangestart = "2020-10-02 09:00:00.000"
timerangestart = timerangestart[:-4]
my_time = datetime.strptime(timerangestart, '%y-%m-%d %H:%M:%S')

timerangestart = "2020-10-02 09:00:00.000"
timerangestart = timerangestart + "000"
my_time = datetime.strptime(timerangestart, '%y-%m-%d %H:%M:%S.%f')

ValueError: time data '2020-10-02 09:00:00' does not match format '%y-%m-%d %H:%M:%S'

我做错了什么？

Answer 1

您的%y是错误的。应该是%Y。

尝试一下：

from datetime import datetime

timerangestart = "2020-10-02 09:00:00.000"
timerangestart = timerangestart[:-4]
my_time = datetime.strptime(timerangestart, '%Y-%m-%d %H:%M:%S')
print(my_time)

timerangestart = "2020-10-02 09:00:00.000"
timerangestart = timerangestart + "000"
my_time = datetime.strptime(timerangestart, '%Y-%m-%d %H:%M:%S.%f')

print(my_time)

输出：

2020-10-02 09:00:00
2020-10-02 09:00:00

Here's是strftime()格式的便捷参考表。