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這篇文章主要講解了python實(shí)現(xiàn)分組求和與分組累加求和的方法,內(nèi)容清晰明了,對(duì)此有興趣的小伙伴可以學(xué)習(xí)一下,相信大家閱讀完之后會(huì)有幫助。
我就廢話不多說(shuō)了,大家還是直接看代碼吧!
# -*- encoding=utf-8 -*- import pandas as pd data=['abc','abc','abc','asc','ase','ase','ase'] num=[1,2,2,1,2,1,2] df1=pd.DataFrame({'name':data,'num':num}) print(df1) df1['mmm']=df1['num'] df2=df1.groupby(['name', 'num'], as_index=False).count() print(df2) df2.sort_values(['name', 'num'], ascending=[1, 1], inplace=True) print(df2) df2['sum']=df2.groupby(['name'])['mmm'].cumsum() print(df2) kk=df2.groupby(['name'],as_index=False)['num'].sum() print(kk) df3 = pd.merge(df2, kk, on='name', how='left',) print(df3) df3['ratio']=df3['sum']/df3['num_y'] df3.columns = ['name', 'num', 'mmm', 'sum','numsum','ratio'] print(df3) df4=df3.groupby(['mmm'],as_index=False)['ratio'].mean() print(df4)
運(yùn)行:
name num 0 abc 1 1 abc 2 2 abc 2 3 asc 1 4 ase 2 5 ase 1 6 ase 2 name num mmm 0 abc 1 1 1 abc 2 2 2 asc 1 1 3 ase 1 1 4 ase 2 2 name num mmm 0 abc 1 1 1 abc 2 2 2 asc 1 1 3 ase 1 1 4 ase 2 2 name num mmm sum 0 abc 1 1 1 1 abc 2 2 3 2 asc 1 1 1 3 ase 1 1 1 4 ase 2 2 3 name num 0 abc 3 1 asc 1 2 ase 3 name num_x mmm sum num_y 0 abc 1 1 1 3 1 abc 2 2 3 3 2 asc 1 1 1 1 3 ase 1 1 1 3 4 ase 2 2 3 3 name num mmm sum numsum ratio 0 abc 1 1 1 3 0.333333 1 abc 2 2 3 3 1.000000 2 asc 1 1 1 1 1.000000 3 ase 1 1 1 3 0.333333 4 ase 2 2 3 3 1.000000 mmm ratio 0 1 0.555556 1 2 1.000000 Process finished with exit code 0
補(bǔ)充知識(shí):python項(xiàng)目篇-對(duì)符合條件的某個(gè)字段進(jìn)行求和,聚合函數(shù)annotate(),aggregate()函數(shù)
對(duì)符合條件的某個(gè)字段求和
需求是,計(jì)算每日的收入和
1、
new_dayincome = request.POST.get("dayincome_time", None) # total_income = models.bathAccount.objects.filter(dayBath=new_dayincome).aggregate(nums=Sum('priceBath')) total_income = models.bathAccount.objects.values('priceBath').annotate(nums=Sum('priceBath')).filter(dayBath=new_dayincome) print("total_income",total_income[0]['nums'])
輸出結(jié)果:total_income 132
2、
from django.db.models import Sum,Count new_dayincome = request.POST.get("dayincome_time", None) total_income = models.bathAccount.objects.filter(dayBath=new_dayincome).aggregate(nums=Sum('priceBath')) print("total_income",total_income['nums'])
輸出結(jié)果:total_income 572
第二種輸出的是正確的數(shù)字
看完上述內(nèi)容,是不是對(duì)python實(shí)現(xiàn)分組求和與分組累加求和的方法有進(jìn)一步的了解,如果還想學(xué)習(xí)更多內(nèi)容,歡迎關(guān)注億速云行業(yè)資訊頻道。
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