variables

问题 The code is pretty self-explanatory - I want to pass a variable to a FlaskForm subclass for further use. from flask import Flask, render_template_string from flask_wtf import FlaskForm from wtforms import StringField from flask_wtf.csrf import CSRFProtect app = Flask(__name__) spam = 'bar' app.secret_key = 'secret' csrf = CSRFProtect(app) @app.route('/') def index(): eggs = spam form = FooForm(eggs) return render_template_string( ''' {{ form.bar_field.label }} {{ form.bar_field }} ''',form =

问题 This question already has answers here : Python - Difference between variable value declaration on Fibonacci function (4 answers) Closed 6 years ago . I was looking at the Python Manual and found this snippet for a Fibonacci-Number generator: def fib(n): # write Fibonacci series up to n a, b = 0, 1 while b < n: print(b, end=' ') a, b = b, a+b print() The output is dependent on n and returns a valid Fibonacci sequence. If you remodel this to use the variables "a" and "b" seperately like so:

问题 This question already has answers here : Python - Difference between variable value declaration on Fibonacci function (4 answers) Closed 6 years ago . I was looking at the Python Manual and found this snippet for a Fibonacci-Number generator: def fib(n): # write Fibonacci series up to n a, b = 0, 1 while b < n: print(b, end=' ') a, b = b, a+b print() The output is dependent on n and returns a valid Fibonacci sequence. If you remodel this to use the variables "a" and "b" seperately like so:

问题 Suppose I have a class like this. Public class MyClass{ private String id; public Myclass(String id){ this.id = id; } public String getId(){ return id; } public void setId(String id){ this.id = id; } } And suddenly I want to change the type of id into Integer . Is there a way to do that with intellij without breaking usages? 回答1: Highlight the type of field and press Ctrl + Shift + F6 or Highlight the type of field, Right-Click -> Refactor -> Type migration or Highlight the type of field,

问题 Suppose I have a class like this. Public class MyClass{ private String id; public Myclass(String id){ this.id = id; } public String getId(){ return id; } public void setId(String id){ this.id = id; } } And suddenly I want to change the type of id into Integer . Is there a way to do that with intellij without breaking usages? 回答1: Highlight the type of field and press Ctrl + Shift + F6 or Highlight the type of field, Right-Click -> Refactor -> Type migration or Highlight the type of field,

问题 Entering the following code into Python 3.5 shell gives me an answer I didn't expect, very basic I know but would somebody help me with an explanation please. >>> x = 5 >>> y = 2 >>> a = x*y >>> x,y,a (5, 2, 10) >>> x = 3 >>> x,y,a (3, 2, 10) These were all on separate lines each preceded by >>> I expected 6, but the "new" x has not been used. 回答1: The 'a' variable will only be updated if you update it deliberately. In order to update 'a' after you have changed 'x', you will need to execute

问题 Entering the following code into Python 3.5 shell gives me an answer I didn't expect, very basic I know but would somebody help me with an explanation please. >>> x = 5 >>> y = 2 >>> a = x*y >>> x,y,a (5, 2, 10) >>> x = 3 >>> x,y,a (3, 2, 10) These were all on separate lines each preceded by >>> I expected 6, but the "new" x has not been used. 回答1: The 'a' variable will only be updated if you update it deliberately. In order to update 'a' after you have changed 'x', you will need to execute

问题 Is there any way to declare variable in if statement (using ANSI C only) ? Example: if(int variable = some_function()) { return 1; } 回答1: No, you cannot do that. What you can do is create a block just for the if { int variable; variable = some_function(); if (variable) return 1; } /* variable is out of scope here */ Note that for this simple case you can call the function as the condition of the if (no need for an extra variable) if (some_function()) return 1; 来源： https://stackoverflow.com

问题 I was looking into this issue but I couldn't find any solid answers for this specific purpose. Let's say I have a URL of... http://mysite.com/stuff/index.php?search=my+search How can I grab this URL and remove index.php?search=my+search from it so it would just be http://mysite.com/stuff/ ? Basically I just want to grab the parent URL without a filename or get variables... No matter what the URL (so I don't have to customize the function for every page I want to use it on) So for an

问题 I was looking into this issue but I couldn't find any solid answers for this specific purpose. Let's say I have a URL of... http://mysite.com/stuff/index.php?search=my+search How can I grab this URL and remove index.php?search=my+search from it so it would just be http://mysite.com/stuff/ ? Basically I just want to grab the parent URL without a filename or get variables... No matter what the URL (so I don't have to customize the function for every page I want to use it on) So for an