python dataframe计算日期对应的周数或者星期几
import pandas as pdimport datetimea=['20211001','20211002','20211003','20211003','20211004']df=pd.DataFrame(a,columns=['t'])df['t2'] = pd.to_datetime(df['t'])df['day_of_week'] = pd.to_datetime(df['t']
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import pandas as pd
import datetime
a=['20211001','20211002','20211003','20211003','20211004']
df=pd.DataFrame(a,columns=['t'])
df['t2'] = pd.to_datetime(df['t'])
df['day_of_week'] = pd.to_datetime(df['t']).dt.week
df['week'] = df['t2'].dt.weekday
df['week_name'] = df['t2'].dt.weekday_name
df
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