我对python非常陌生,所以除了打字错误之外请其他。
我正在尝试根据不同列的特定条件在数据框中添加新列。所以它不是返回值,而是返回一个我刚刚传递的字符串。
我不知道为什么会这样,以及如何摆脱它。
附加屏幕enter image description here。
vdx_access_table [ “Delivered_Engagements”] = vdx_access_table [ “Delivered_Engagements”]。astype(int)的
vdx_access_table["Delivered_Impressions"]=vdx_access_table["Delivered_Impressions"].astype(int)
choices_vdx_eng = vdx_access_table["Delivered_Engagements"]/vdx_access_table["BOOKED_IMP#BOOKED_ENG"]
choices_vdx_cpcv = vdx_access_table["Delivered_Impressions"]/vdx_access_table["BOOKED_IMP#BOOKED_ENG"]
vdx_access_table['Delivery%']=[choices_vdx_eng if x=='CPE' or x=='CPE+' else choices_vdx_cpcv for x in
vdx_access_table['COST_TYPE']]
答案 0 :(得分:1)
numpy.where
使用条件isin
:
choices_vdx_eng=vdx_access_table["Delivered_Engagements"]/vdx_access_table['BOOKED_IMP#BOOKED_ENG']
choices_vdx_imp=vdx_access_table["Delivered_Impressions"]/vdx_access_table['BOOKED_IMP#BOOKED_ENG']
mask = vdx_access_table['COST_TYPE'].isin(['CPE','CPE+'])
vdx_access_table['Delivery%']= np.where(mask, choices_vdx_eng, choices_vdx_imp )
或者:
mask = vdx_access_table['COST_TYPE'].isin(['CPE','CPE+'])
vdx_access_table['Delivery%']= np.where(mask,
vdx_access_table["Delivered_Engagements"],
vdx_access_table["Delivered_Impressions"]) /vdx_access_table['BOOKED_IMP#BOOKED_ENG']
编辑:
df = pd.DataFrame({'Delivered_Engagements':[10,20,30,40,50],
'Delivered_Impressions':[5,4,8,7,3],
'BOOKED_IMP#BOOKED_ENG':[3,2,0,4,2],
'COST_TYPE':['CPE','CPE+','CPM','CPCV','AAA']})
df["Delivered_Engagements"]=df["Delivered_Engagements"].astype(int)
df["Delivered_Impressions"]=df["Delivered_Impressions"].astype(int)
eng = df["Delivered_Engagements"]/df["BOOKED_IMP#BOOKED_ENG"]
cpcv = df["Delivered_Impressions"]/df["BOOKED_IMP#BOOKED_ENG"]
mask1 = df["COST_TYPE"].isin(['CPE','CPE+'])
mask2 = df["COST_TYPE"].isin(['CPM','CPCV'])
df['Delivery%']=np.select([mask1, mask2], [eng, cpcv], default=0)
df['Delivery%']=df['Delivery%'].replace(np.inf,0)
print (df)
BOOKED_IMP#BOOKED_ENG COST_TYPE Delivered_Engagements \
0 3 CPE 10
1 2 CPE+ 20
2 0 CPM 30
3 4 CPCV 40
4 2 AAA 50
Delivered_Impressions Delivery%
0 5 3.333333
1 4 10.000000
2 8 0.000000
3 7 1.750000
4 3 0.000000