Question

我编写了一个功能，可以输入多个用户并使用输入的数据。以下函数位于file1

中

def dimensions
    f = open("file.txt", "a")
        distance= (raw_input("Enter distance: "))
        height= raw_input("Enter height: "))
        length= raw_input("Enter length: "))
        f.write(fullInfo)
        f.close()

以下内容属于file2。 File2使用file1调用import此函数dimensions的调用如下：

    def calculation():
        print "1- Enter dimensions"
        print "2- Enter something else"
        choice = raw_input("")
        if choice == 1:
            file1.dimensions

我遇到的问题是，如果用户不想输入维度，并且错误地在菜单中输入了1，他仍然需要输入所有三个查询。

我尝试在file1中导入file2并编写以下代码，以便它可以返回菜单，但是将两个文件相互导入似乎无法正常工作。这是在file1

中编码的

if distance == 'exit':
    file2.calculation

任何有关如何让用户脱离问题并返回菜单的帮助或指示将不胜感激。感谢

Answer 1

添加一个名为option 0的附加选项，这意味着用户想要重新启动并添加if条件来检查用户是否输入了0

  int N = int.Parse(Console.ReadLine());

  String line = Console.ReadLine();

  int[] A = line
    .Split(new Char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
    .Select(item => int.Parse(item))
    .ToArray();

  // given N differs from actual one
  if (N != A.Length) {
    // Throw an exception or re-assign N
    N = A.Length;
  }

 // A as well as N are obtained

 for (j = 0; j < N; j++) 
   if A[j] % 2 != 0
     CUL++;
   else  
     cL++;

 if (cL > CUL)
   Console.WriteLine("READY FOR BATTLE");
 else
   Console.WriteLine("NOT READY");

Answer 2

fullInfo未在您发布的代码中定义。
if choice == 1:永远不会成立，因为raw_input("") / choice是一个字符串，需要强制转换为int才能与1进行比较才有意义。

在下面的代码段中，dimensions缺少括号和冒号，distance不应嵌套/缩进f = open("file.txt", "a")

def dimensions
    f = open("file.txt", "a")
        distance= (raw_input("Enter distance: "))

除非添加括号，否则您实际上调用函数。这适用于以下calculation：

if distance == 'exit':
    file2.calculation

＆＃34;（...）将两个文件相互导入（...）＆＃34; 称为循环导入或循环导入。有办法让它发挥作用，但如果可能的话，最好避免使用它。如果您有兴趣，可以参考here。

是的，对不起......我很无聊

<强> menu.py

import json
import os
import get_dimensions


def dims_load(dims_json_file):
    """ you hand this function a filename and it returns a dictionary of dimensions """
    with open(dims_json_file, "r") as dims_json:
        return json.loads(dims_json.read())

def dims_save(dims_dict, dims_json_file):
    """ you hand this function a dictionary and a filename to save the dimensions """
    with open(dims_json_file, "w") as dims_json:
        dims_json.write(json.dumps(dims_dict)) 

def menu():
    dimensions_file = "dimensions.json"
    file_exists = os.path.isfile(dimensions_file)
    print "1- Enter dimensions"
    print "2- Load previous dimensions"
    print "3- Johny's funky function!"
    choice = raw_input()
    try:
        choice = int(choice)
    except ValueError as e:
        print "Only numbers can be entered. Error details:", str(e)
    if choice == 1:
        dims_dict = get_dimensions.prompt_user()
        if "exit" in dims_dict.values():
            print "User chose to exit get_dimensions()"
            menu()
        else:
            if file_exists:
                print "overwriting your precious data!"
            dims_save(dims_dict, dimensions_file)
    elif choice == 2:
        if file_exists:
            print dims_load(dimensions_file)
        else:
            print "No dimensions file found. Can't print"
    elif choice == 3:
        print "Johny's funky function has yet to see the light of day..."
    else:
        print "I have no idea what you want. Make up your mind, human!?"

menu()

<强> get_dimensions.py

def prompt_user():
    dims = {
        "distance":"",
        "length":"",
        "height":""
    }
    dims_keys = dims.keys()
    current = 0
    while current < len(dims_keys):
        dims[dims_keys[current]] = raw_input("Enter " + dims_keys[current] + " (type 'exit' to return to menu): ") 
        current += 1
        if "exit" in dims.values():
            return dims
    return dims

使用Python

2 个答案: