Mis*_*ing 3 python dictionary file
以下代码基本上执行以下操作:
我的问题是:是否有更简单,更有效(更快)的方法从文件内容创建字典:
文件:
user1,pass1
user2,pass2
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码
def login():
print("====Login====")
usernames = []
passwords = []
with open("userinfo.txt", "r") as f:
for line in f:
fields = line.strip().split(",")
usernames.append(fields[0]) # read all the usernames into list usernames
passwords.append(fields[1]) # read all the passwords into passwords list
# Use a zip command to zip together the usernames and passwords to create a dict
userinfo = zip(usernames, passwords) # this is a variable that contains the dictionary in the 2-tuple list form
userinfo_dict = dict(userinfo)
print(userinfo_dict)
username = input("Enter username:")
password = input("Enter password:")
if username in userinfo_dict.keys() and userinfo_dict[username] == password:
loggedin()
else:
print("Access Denied")
main()
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为了您的答案,请:
a)使用现有的函数和代码进行调整b)提供解释/注释(特别是使用split/strip)c)如果使用json/pickle,请包含初学者访问的所有必要信息
提前致谢
只需使用该csv模块:
import csv
with open("userinfo.txt") as file:
list_id = csv.reader(file)
userinfo_dict = {key:passw for key, passw in list_id}
print(userinfo_dict)
>>>{'user1': 'pass1', 'user2': 'pass2'}
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with open() 是用于打开文件和处理关闭的相同类型的上下文管理器.
csv.reader是加载文件的方法,它返回一个可以直接迭代的对象,就像在理解列表中一样.但不是使用理解列表,而是使用理解词典.
要构建具有理解样式的字典,可以使用以下语法:
new_dict = {key:value for key, value in list_values}
# where list_values is a sequence of couple of values, like tuples:
# [(a,b), (a1, b1), (a2,b2)]
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