我有以下代碼在大熊貓數據幀如何遍歷行
import pandas as pd
import numpy as np
import csv
location = r'C:\Users\tmaina\Desktop\scf\output.csv'
df = pd.read_csv(location,sep='\s*,\s*',engine='python')
for i, row in df.iterrows():
if row['COUPON_NUMBER'] == 1:
df.OND_ORIGIN = df.DEP_FROM
if df.loc[i+1,'PLDATE'] == row['PLDATE'] & row['TICKET_NUMBER'] ==df.loc[i+1,'TICKET_NUMBER'] &row['COUPON_NUMBER'] == 2:
df.OND_DEST = df.loc[i+1,'ARR_TO']
else:
df.OND_DEST = df.ARR_TO
elif row['COUPON_NUMBER'] == 2 & row['TICKET_NUMBER'] ==df.loc[i-1,'TICKET_NUMBER'] & row['PLDATE'] ==df.loc[i-1,'PLDATE']:
df.OND_ORIGIN==df.loc[i-1,'DEP_FROM']
df.OND_DEST = df.ARR_TO
elif row['COUPON_NUMBER'] == 3 & row['TICKET_NUMBER'] ==df.loc[i-1,'TICKET_NUMBER'] & row['PLDATE'] !=df.loc[i-1,'PLDATE']:
df.OND_ORIGIN = df.DEP_FROM
if df.loc[i+1,'PLDATE'] == row['PLDATE'] & row['TICKET_NUMBER'] ==df.loc[i-1,'TICKET_NUMBER']:
df.OND_DEST = df.loc[i+1,'ARR_TO']
else:
df.OND_DEST = df.ARR_TO
elif row['COUPON_NUMBER'] == 4 & row['TICKET_NUMBER'] ==df.loc[i-1,'TICKET_NUMBER']& row['PLDATE'] ==df.loc[i-1,'PLDATE']:
df.OND_ORIGIN = df.loc[i-1,'DEP_FROM']
df.OND_DEST = df.ARR_TO
df.to_csv('out.csv', sep=',',index = False)
爲以下各列的輸出是
COUPON_NUMBER TICKET_NUMBER DEP_FROM ARR_TO OND_ORIGIN OND_DEST PLDATE STOPOVER
1 1054737998 HRE NBO HRE NBO 20170419 O
2 1054737998 NBO KGL NBO KGL 20170419 X
3 1054737998 KGL NBO KGL NBO 20170519 O
4 1054737998 NBO HRE NBO HRE 20170419 X
所需的輸出是
COUPON_NUMBER TICKET_NUMBER DEP_FROM ARR_TO OND_ORIGIN OND_DEST PLDATE STOPOVER
1 1054737998 HRE NBO HRE KGL 20170419 O
2 1054737998 NBO KGL HRE KGL 20170419 X
3 1054737998 KGL NBO KGL HRE 20170519 O
4 1054737998 NBO HRE KGL HRE 20170419 X
的邏輯是對於屬於特定票證的給定coupon_number
,我們檢查pldate
,如果更多一張優惠券在同一個月內運行,ond_origin
和ond_dest
應該相等。 ond_dest
的確定是通過檢查某個城市是否有停留。如果有一個,則arr_to
變爲ond_dest
,並且ond_origin
成爲第一個沒有中止的dep_from
。
@Chris指出,感謝您的糾正 – MTK
你的原始output.csv文件格式是什麼raws? –
我們需要一些樣本輸入來創建您的預期輸出。 –