flask - Read For Learn

File “/usr/bin/pip”, line 9, in from pip import main ImportError: cannot import name main

TL;DR The ‘ideal’ solution (Ubuntu/Debian way):$ python -m pip uninstall pip to uninstall the new pip 10 and retain your Ubuntu/Debian-provided patched pip 8. For a system-wide installation of modules use apt wherever possible (unless you are in a virtualenv), more on it below. In older Ubuntu/Debian versions, always add –user flag when using pip outside of virtualenvs (installs into ~/.local/, default in … Read more

Create dynamic URLs in Flask with url_for()

It takes keyword arguments for the variables: The flask-server would have functions:

Flask-framework: MVC pattern

Flask is actually not an MVC framework. It is a minimalistic framework which gives you a lot of freedom in how you structure your application, but MVC pattern is a very good fit for what Flask provides, at least in the way that MVC pattern is understood today in the context of web applications (which … Read more

Flask Value error view function did not return a response [duplicate]

The following does not return a response: You must return anything like return afunction() or return ‘a string’. This can solve the issue

Separating html and JavaScript in Flask [duplicate]

You need to invoke the url_for function within a markup so that the correct url be resolved, i.e. Please consider following the Quick Start guide fully as it will help with other issues you might have.

Your WSGIPath refers to a file that does not exist

There’s a lot of configuration issues that can arise with Flask deployed on AWS. I was running into a similar issue as you, so I can at least show you what I did to resolve the WSGI error. First, apparently you can do this without the .ebextensions folder (see this post here. and look at … Read more

How to get POSTed JSON in Flask?

First of all, the .json attribute is a property that delegates to the request.get_json() method, which documents why you see None here. You need to set the request content type to application/json for the .json property and .get_json() method (with no arguments) to work as either will produce None otherwise. See the Flask Request documentation: … Read more

python-How to set global variables in Flask?

With: You are not defining, just declaring so it’s like saying there is a global index_add_counter variable elsewhere, and not create a global called index_add_counter. As you name don’t exists, Python is telling you it can not import that name. So you need to simply remove the global keyword and initialize your variable: Now you can import it with: The construction: is used … Read more

How do I get Flask to run on port 80?

So it’s throwing up that error message because you have apache2 running on port 80. If this is for development, I would just leave it as it is on port 5000. If it’s for production either: Not Recommended Stop apache2 first; Not recommended as it states in the documentation: You can use the builtin server during development, but you … Read more

python flask import error

Just run apt-get install python3-flask Edited to install the python3 version, since nobody should be using python2 now.

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