#Group by Function df.groupby(‘Date‘)[[‘Date‘]].count() df.groupby(‘Date‘)[[‘Date‘]].sum() # if it can be sumable #Sort Function type(df[‘Date‘]) <class ‘pandas.core.series.Series‘> df[‘Date‘].sort_values() #View all types of each Column df.dtypes #Change Col Type to DateTime pd.to_datetime(df[‘Date‘])
原文：http://www.cnblogs.com/kiddy/p/5166388.html