您可以将^{}与^{}一起使用:df[[‘Date’, ‘Time’]] = df.DateTime.str.split(expand=True)
df.Date = df.Date.str.lstrip(‘0’) + ‘/2010’
print (df)
DateTime Date Time
0 03/17 04:00:00 3/17/2010 04:00:00
1 01/01 15:00:00 1/01/2010 15:00:00
regex ^0(字符串中的第一个0)与^{}相似的解决方案:
^{pr2}$
计时:In [10]: %timeit (jez(df2))
1 loop, best of 3: 483 ms per loop
In [11]: %timeit (jez(df))
1 loop, best of 3: 500 ms per loop
In [12]: %timeit (user39(df1))
1 loop, best of 3: 740 ms per loop
计时代码:df = pd.DataFrame({‘DateTime’: [“03/17 04:00:00”, “01/01 15:00:00”]})
df = pd.concat([df]*100000).reset_index(drop=True)
[200000 rows x 3 columns]
print (df)
df1 = df.copy()
df2 = df.copy()
def jez(df):
Original: https://blog.csdn.net/weixin_35316606/article/details/113650852
Author: 制度风洞
Title: python中删除字符串后面的零_Python从字符串中删除特定的零
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