程序在 python 中无法正常工作的问题

Question

       empmangpro = True
       employees = []
       while empmangpro == True:
             try:
                 empcount = len(employees)
                 print("--------------------Employee Management System--------------------")
                 print("")
                 print("There are "+str(empcount)+" employees in the system.")
                 print("")
                 print("------------------------------------------------------------------")

                 print("1. Add new employee")
                 print("2. View all employees")
                 programselection = int(input("Please select your option number: "))

                 if programselection == 1:
                 employee = []
                 employee.append(input("First and Last Name: "))
                 employee.append(input("Social Security Number: "))
                 employee.append(input("Phone Number: "))
                 employee.append(input("Email Address: "))
                 employee.append(input("Salary:$"))
                 employees.append(employee)
                 elif programselection == 2:
                      i = 0
                      j = 0
                      empstr = ""
                      while i < int(empcount):
                          while j < 5:
                             empstr = empstr + employees[i][j]
                      if j != 4:
                         empstr = empstr + ", "
                         j += 1
                         if i+1 != int(empcount):
                            empstr = empstr + "\n"
                            j = 0
                            i += 1
                           print(empstr)
                           print[employees]
                        elif programselection < 3:
                           empmangpro = False
                        else:
                             print("Please enter valid information")
                except ValueError:
                print("Please enter valid information")
                continue

我有选项 1，您可以将多个员工添加到系统中，但是当我选择选项 2 时，没有任何反应。它应该打印我添加的所有员工。我在这里做错了什么？我编程才不到一个月，所以我还有很多东西要学。我错过了什么或做错了什么？

Answer 1

不太清楚您在选项 2 中尝试做什么。请尝试在将来评论您的代码。你帖子中的标签不准确，所以我做了一些猜测。也许这会帮助你解决你的问题：

empmangpro = True
employees = []
while empmangpro == True:
    try:
        empcount = len(employees)
        print("--------------------Employee Management System--------------------")
        print("")
        print("There are "+str(empcount)+" employees in the system.")
        print("")
        print("------------------------------------------------------------------")

        print("1. Add new employee")
        print("2. View all employees")
        programselection = int(input("Please select your option number: "))

        if programselection == 1:
            employee = []
            employee.append(input("First and Last Name: "))
            employee.append(input("Soci1al Security Number: "))
            employee.append(input("Phone Number: "))
            employee.append(input("Email Address: "))
            employee.append(input("Salary:$"))
            employees.append(employee)
        elif programselection == 2:
            i = 0
            j = 0
            empstr = ""
            while i < empcount:
                print(str(employees[i])+"\n")
                i += 1

        elif programselection > 2:
            empmangpro = False
            print("Stopping programm")
        else:
            print("Please enter valid information")
    except ValueError:
        print("Please enter valid information")
        continue

此外，如果您想停止程序，请使用 elif programselection > 2: 而不是 elif programselection < 3:。

Answer 2

您说选项 1 有效。好的（我看到一些缩进问题）。

对于选项 2，老实说，我并没有完全遵循您的代码。如果您希望选项 2 打印所有员工，我建议创建一个 Employee 类。这样，您可以在任何地方print(employee)。

可以把这个放到employee.py:

class Employee:
    def __init__(self, name): # can add all you need social security, ...
        first, last = name.split(' ')
        self.first = first # add a new line per new parameter
        self.last = last
    def __str__(self):
        # here you can add all of your logic
        # to properly format social security, phone number, etc.
        # just be sure to return a string, and not print a string!
        return f'{self.last}, {self.first}'

然后在你的主文件中：

import employee # put at top of file
employees = [Employee('John Doe'), Employee('Jane Doe')] # sample data
for e in employees:
    print(e)

输出：

Doe, John
Doe, Jane

至于不正确的间隔：

             if programselection == 1:
                 employee = []
                 # ...
                 employees.append(employee)
             elif programselection == 2:

还有：

            except ValueError:
                print("Please enter valid information")
                continue