Question

我正在尝试将这两个代码合并在一起，以便最终的部分可以将文本文档“付款”附加到列表中。对于每行“付款”，我希望它在myList的列表中，所以它看起来像这样：

myList = [['E1234','12/09/14','440','A','0']['E3431','10/01/12','320','N','120']['E0987','04/12/16','342','A','137']]

我希望能够创建最终代码以提示用户输入客户编号，然后在myList中搜索客户编号，并在屏幕上显示客户的所有信息。

这是两个计划中的第一个。它是最终代码的“支柱”。我们称之为A：

print("Option A: Show a record\nOption Q: Quit")
decision = input("Enter A or Q: ")

if decision == "A" or decision == "a":
    myFile = open("Payments.txt")
    customer_number = input("Enter a customer number to view their details: ")
    record = myFile.readlines()
    for line in record:
        if customer_number in line:
            print(line)
    myFile.close()

elif decision == "Q" or "q":
    exit

这是第二段代码。我们称之为B：

myFile = open("Payments.txt")
myList = []
for item in myFile:
    print(item.strip())
    myList.append(item.strip().split(','))
myFile.close()
print(myList)

我想在if语句中插入B：if decision == "A" or decision == "a":。

我对for循环感到困惑，因为在A和B中有一个for循环，这两个循环对最终代码至关重要。我无法将B放入A而不会破坏任何一个for循环。

print("Option A: Show a record\nOption Q: Quit")
decision = input("Enter A or Q: ")
myList = []

if decision == "A" or decision == "a":
    myFile = open("Payments.txt")
    customer_number = input("Enter a customer number to view their details: ")
    record = myFile.readlines()
    for line in record:
        for item in myFile:
            print(item.strip())
            myList.append(item.strip().split(','))
            print(myList)
        if customer_number in line:
            print(line)
    myFile.close()

elif decision == "Q" or "q":
    exit

显示客户编号来自的行，但不会打印列表。

更新

我希望能够分别打印每行的个别数据：

Customer number: E1234
Date of payment: 12/09/14
Payment amount: £440
Paid amount: £0

Answer 1

在你的评论中，你提到你需要附加到列表中，所以我修改了我的脚本以包含它，但你当前的答案是分开你的A和B部分，但你必须将它们组合起来。< / p>

逻辑是，如果customer_number存在于一行中，那么您将附加到列表并使用循环迭代列表以打印您想要的内容。您的解决方案是打印整个客户详细信息并打印其他所有行。

print("Option A: Show a record\nOption Q: Quit")
decision = input("Enter A or Q: ").lower()
myList = []

if decision == "a":
    myFile = open("Payments.txt")
    customer_number = input("Enter a customer number to view their details: ")
    record = myFile.readlines()
    for line in record:
        if customer_number in line:
            myList.append(line.strip().replace("'","").split(','))
            for info in myList:
                print("Customer number: ", info[0])
                print("Date of payment: ", info[1])
                print("Payment Amount: ", info[2])
                print("Paid Amount: ", info[4])
    myFile.close()

elif decision == "q":
    exit()

这是输出：

Answer 2

我希望能够创建最终代码以提示用户输入客户编号，然后在myList中搜索客户编号并在屏幕上显示客户的所有信息。

我对您的代码进行了一些修改，并放入符合PEP-8标准的Boilerplate。

def customer_payment(customer_number):
    """Edited Code. Purpose is to accept User Input for a customer number
    Search for Customer Number, and if Found, Display Information about Customer.
    """
    myList = []
    with open("Payments.txt") as myFile:  
        for line in myFile:
            if customer_number in line:
                print(line)
            for item in line:
                print(item.strip())
                myList.append(line.strip().split(','))


def main():
    decision = input("Option A: Show a record\nOption Q: Quit\nEnter A or Q: ")
    if decision.lower() == "a":
        customer_number = input("Enter a customer number to view their details: ")
        customer_payment(customer_number)

if __name__=="__main__":
    main()

这可能需要根据Payments.txt所在的格式进行修改。

在if语句下将两个for循环合并在一起

2 个答案: