如何解决，TypeError：％不支持的操作数类型：'NoneType'和'int'

Question

Following are 4 files, each separated by a series of "#" pound or hashTag symbols followed by the file name. 以下是4个文件，每个文件由一系列“＃”井号或hashTag符号分隔，后跟文件名。 The code is between grave accent ( ` ) symbols. 该代码位于重音符号（`）之间。

Problem is that when this python powered web application is executed, the line number 11 in python file "evenOrOdd.py" is where the error is occuring. 问题是执行此python供电的Web应用程序时，发生错误的位置是python文件“ evenOrOdd.py”中的行号11。 When you goto: http://127.0.0.1:5000 on your web browser following error occurs: 当您在Web浏览器上转到： http : //127.0.0.1 : 5000时，发生以下错误：

TypeError: unsupported operand type(s) for %: 'NoneType' and 'int'

On clicking this error, it takes me to the line number 11. 点击此错误后，我进入第11行。

On line number 11, python code is:- 在第11行，python代码为：-

elif num%2==0:

On line number 7 is the variable "num" defined as:- 在第7行上，变量“ num”定义为：

num=int(request.form.get("numberInputFromForm"))

I have tried removing the int() on line 7 of python file "evenOrOdd.py", doesn't work, still gives the same error. 我试过删除python文件“ evenOrOdd.py”的第7行上的int（），不起作用，仍然给出相同的错误。

And also I've independently tried to convert "num" variable to int(). 而且我也独立尝试将“ num”变量转换为int（）。

###############################################evenOrOdd.py ################################################ evenOrOdd.py

{% extends "layout.html" %}

{% block f %}
  <form  action="{{url_for('indexFunction')}}" method="post">
    <input name='numberInputFromForm' type='number' placeholder="Enter number here...">
    <button> Submit </button>
  </form>
{% endblock %}

###############################################layout.html ############################################## layout.html

 <!DOCTYPE html> <html> <head> <title>My Web Page</title> <link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}"> </head> <body> <br> <h1>Python powered web app<h1> This application tells is a number is even or odd <br> {% block f %} {% endblock %} <p> {% block p %} {% endblock %} </p> </body> </html>

###############################################index.html ############################################## index.html

 {% extends "layout.html" %} {% block f %} <form action="{{url_for('indexFunction')}}" method="post"> <input name='numberInputFromForm' type='number' placeholder="Enter number here..."> <button> Submit </button> </form> {% endblock %}

###############################################evenOrOdd.html ################################################ evenOrOdd.html

 {% extends "layout.html" %} {% block p %} {% if dict['even'] %} <h1> {{dict['number_input']}} is EVEN </h1> {% elif dict['odd'] %} <h1> {{dict['number_input']}} is ODD </h1> {% else %} <h1> {{dict['number_input']}} is ZERO </h1> {% endif %} {% endblock %} {% block f %} <form action="{{url_for('indexFunction')}}" method="post"> <input name='numberInputFromForm' type='number' placeholder="Enter number here..."> <button> Submit </button> </form> {% endblock %}

Following error occurs:- TypeError: unsupported operand type(s) for %: 'NoneType' and 'int' 发生以下错误：-TypeError：％不支持的操作数类型：'NoneType'和'int'

Answer 1

To get the form (which I assume is in "index.html") into the browser, there's an initial GET. 为了将表单（我认为在“ index.html”中）放入浏览器，需要进行初始GET。 Unless you pass ?numberInputFromForm=something , numberInputFromForm won't get present, and will present as None . 除非您通过?numberInputFromForm=something ， numberInputFromForm将不会显示，并且将显示为None 。

The fix is to guard the code path that depends on it, such that the path is only taken on a POST. 解决方法是保护依赖它的代码路径，以使该路径仅在POST上采用。 Something like 就像是

if request.method == 'POST':
    num=int(request.form.get("numberInputFromForm"))
    ...
    return render_template("evenOrOdd.html", ...)
else:
    return render_template("index.html")

如何解决，TypeError：％不支持的操作数类型：'NoneType'和'int'

问题描述

1 个解决方案

解决方案1
1 已采纳 2019-07-31 17:00:31

如何解决，TypeError：％不支持的操作数类型：&#39;NoneType&#39;和&#39;int&#39;

问题描述

1 个解决方案

解决方案1 1 已采纳 2019-07-31 17:00:31

如何解决，TypeError：％不支持的操作数类型：'NoneType'和'int'

解决方案1
1 已采纳 2019-07-31 17:00:31