Learning immediately: https://edu.csdn.net/course/play/26990/361125?utm_source=blogtoedu
1, modify
Modify the line
df1.loc [df1 [ 'gender'] == '0', 'gender'] = 'F'
Modify column
df1.rename (columns = { 'user_id': 'User ID', 'gender': 'Sex'}, inplace = True)
Modify Index
df1.rename(index = {3:334,4:3355},inplace = True)
Reset Index
df1.reset_index(drop =True,inplace = True)
2, the query
Screening travel
df[df['buy_mount']>10]
df[(df['buy_mount']>10) & (df['day'] >20140101)]
df[df['buy_mount'].between(4,10,inclusive = True)] 闭区间
df[df['cat'].isin([28,38])]
