Numpy增加一列，指定概率指定参数

这里主要应用到numpy.random.choice

可以根据需求，比如增加一列，A B C 为该列数据，随机概率生成

详见代码

import numpy as np

import pandas as pd
columns_user = ['number','gender','date']
columns_order = ['order_id','user_id','ispaid','price','paidtime']
user_info = pd.read_csv('user_info_utf.csv',names=columns_user)
order_info = pd.read_csv('order_info_utf.csv',names = columns_order)

# 增加一列gender
a = np.random.choice(['Male','Female'],size=len(order_info['user_id']),p =[0.3,0.7])
order_info['gender'] = pd.Series(a)
# 增加一列 商铺
print(pd.value_counts(order_info['gender']))
b = np.random.choice(['A','B','C'],size=len(order_info['user_id']),p=[0.5,0.3,0.2])
order_info['shop'] = pd.Series(b)
print(pd.value_counts(order_info['shop']))
print(order_info.head())