pandas group by month
b = pd.read_csv('b.dat')
b.index = pd.to_datetime(b['date'],format='%m/%d/%y %I:%M%p')
b.groupby(by=[b.index.month, b.index.year])
# or
b.groupby(pd.Grouper(freq='M')) # update for v0.21+
# or
df.groupby(pd.TimeGrouper(freq='M'))group by month and day pandas
max_temp = dfall.groupby([(dfall.Date.dt.month),(dfall.Date.dt.day)])['Data_Value'].max()Copyright © 2021 Codeinu
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