Question

如果我的代码混乱，我还有其他几条要补充。我正在尝试从文件中删除整个键，值。这些是带有键和值的字典格式。密钥是电子邮件，以便此人输入要删除的电子邮件。

我尝试使用pop和del，但是我做错了或者导致代码错误的


emailDict = dict()
initialQ = input("For E-mail's would you like to add, delete, lookup, or change? ")
if initialQ == "add":
    with open("C:\\TestData\\EmailList.txt","a+") as infile:
        howMany = int(input("How many people would you like to enter? "))
        for x in range(howMany):
            key = input("Please enter their E-mail: ")
            value = input("Please enter name of who the E-mail belongs to: ")
            infile.write(value+ " E-mail is ")
            infile.write(key+"\n")
            emailDict[key]= value
            print("Please make sure info is correct",emailDict)
        infile.close()
if initialQ == "delete":
with open("C:\\TestData\\EmailList.txt","r+") as infile:

    howMany = int(input("How many people would you like to delete? "))

    for x in range(howMany):

        nameDel = input("Enter the email you would like to remove: ")
        deleteP= infile.readlines()
        if nameDel in deleteP:
           del [key]
    infile.close()

从文件中删除键和值。

Answer 1

尝试这样的事情：

# read all the lines
with open("EmailList.txt") as infile:
    deleteP= infile.readlines()

# if you have \n at the end, strip that
deleteP = [x.strip() for x in deleteP]
print(deleteP)

howMany = int(input("How many people would you like to delete? "))

for x in range(howMany):
    nameDel = input("Enter the email you would like to remove: ")
    if nameDel in deleteP:
       deleteP.remove(nameDel)

print(deleteP)

示例文件

> cat EmailList.txt
abc@test.com
xyz@test.com
who@test.com
123@test.com

结果

['abc@test.com', 'xyz@test.com', 'who@test.com', '123@test.com']
How many people would you like to delete? 2
Enter the email you would like to remove: xyz@test.com
Enter the email you would like to remove: 123@test.com
['abc@test.com', 'who@test.com']

请注意，这不会将信息写回到文件中。您必须像这样将其自己写回到文件中：

with open("EmailList.txt", "w") as outfile:
    for item in deleteP:
        outfile.write(item + "\n")

如何从文件中删除密钥

1 个答案: