如何将 int64 转换为分钟？ 蟒蛇熊猫

Question

I would like to transform this column (format int64) to a minutes format to do calculation

Duration(min)
10
30
5
15
5

I tried this:

df['Duration(min)'] = pd.to_datetime(df['Duration(min)'], format='%H%M')

But I have ValueError: time data '5' does not match format '%H%M' (match)

Answer 1

You need to use pd.to_timedelta here.

pd.to_timedelta(df['Duration(min)'], unit='min')

0   0 days 00:10:00
1   0 days 00:30:00
2   0 days 00:05:00
3   0 days 00:15:00
4   0 days 00:05:00
Name: Duration(min), dtype: timedelta64[ns]

unit -> 'm' / 'minute' / 'min' / 'minutes' / 'T' all are shorthand for minutes .

Answer 2

Using pd.to_datetime with strftime -

pd.to_datetime(df.Duration(min), unit='m').dt.strftime('%H:%M')

Output-

0    00:10
1    00:30
2    00:05
3    00:15
4    00:05
dtype: object

Answer 3

Why %H%M when all you have is minutes? Try format='%M'.