如何更新 python 中的时间格式？

Question

在 CSV 文件中我有值

id   description
a1   "[00:01.461]my name is john[00:22.95]I live in NY[00:27.137]Works in[00:28.13]media"
b1   "[00:29.13]Hi[00:32.40]How are you"
c1   "[00:36.401]see you soon[00:41.331]Bye"

我想要句号(.)后的两位数字，所以[00:01.461]将是[00:01.46]所以时间格式应该是[xx:xx.xx]

期望的输出：

id   description
a1   "[00:01.46]my name is john[00:22.95]I live in NY[00:27.13]Works in[00:28.13]media"
b1   "[00:29.13]Hi[00:32.40]How are you"
c1   "[00:36.40]see you soon[00:41.33]Bye"

如何在 python 或数据库端执行此操作？

Answer 1

您可以使用pandas.str.replace

import pandas as pd

d =[['a1',   "[00:01.461]my name is john[00:22.95]I live in NY[00:27.137]Works in[00:28.13]media"],
['b1',   "[00:29.13]Hi[00:32.40]How are you"],
['c1',   "[00:36.401]see you soon[00:41.331]Bye"]]

df = pd.DataFrame(d, columns=['id', 'description'])

df['description'] = df['description'].str.replace(r'(\[\d{2}:\d{2}.(\d{3})\])', lambda x: x.groups()[0][:7] + x.groups()[1][:2] + x.groups()[0][-1])

df

    id   description
0   a1   [00:01.46]my name is john[00:22.95]I live in NY[00:27.13]Works in[00:28.13]media
1   b1   [00:29.13]Hi[00:32.40]How are you
2   c1   [00:36.40]see you soon[00:41.33]Bye\n'

如何更新 python 中的时间格式？

How to update time format in python?

python

mysql

python-2.7

python-3.x