錯誤：只能連接列表（不是「int」）到列表

Question

當我嘗試在csv文件中填充用戶First_Name時出現此錯誤。可有人告訴我，我做錯了什麼

import csv 

# Define users 
valid_input = False 
while not valid_input: 
    users =raw_input('Number of users: ') 
    try: 
     users = range(0,int(users)) 
     valid_input = True 
    except: 
     print "Invalid input" 
     pass 

First_Name = ["Test"+str(user) for user in range (1, users+1)] 
Last_Name = ["User%s" %user for user in users] 
Email_Addresses = [] 
for user in users: 
    email= raw_input("Email domain for user %d: " %user) 
    Email_Addresses.append(Last_Name[user] + email) 
Password = ["Password1" for user in users] 
Group =["Test" for user in users] 
Admin = ["Yes" for user in users] 
# open a file for writing. 
# open a file for writing. 
with open('users.csv', 'wb') as csv_out: 
    writer = csv.writer(csv_out) 
    writer.writerows(zip(Email_Addresses, Password, First_Name, Last_Name, Group, Admin)) 

這是我得到 回溯（最近最後一次通話）回溯： 將First_Name =「測試」 + STR（用戶）用戶範圍內（1 ，用戶+ 1）] 類型錯誤：只能串聯列表（不是 「INT」）列出

Answer 1

users是一個列表：

users = range(0,int(users)) 

但你嘗試創建一個新範圍從該列表：

First_Name = ["Test"+str(user) for user in range (1, users+1)] 

其中users + 1是一個嘗試添加1到列表中。

不要這樣做。只需循環使用您現有的範圍：

First_Name = ["Test"+str(user + 1) for user in users]