Python – Wx can’t run on mac

anacondamacospythonwxpython

I installed anaconda instead of system's python on mac,but when I type

import wx
app = wx.App()

I got this:

This program needs access to the screen. Please run with a Framework
build of python, and only when you are logged in on the main display
of your Mac.

I use the script:

#!/bin/bash

# what real Python executable to use
PYVER=2.7
PYTHON=/Library/Frameworks/Python.framework/Versions/$PYVER/bin/python$PYVER

# find the root of the virtualenv, it should be the parent of the dir this script is in
ENV=`$PYTHON -c "import os; print os.path.abspath(os.path.join(os.path.dirname(\"$0\"), '..'))"`

# now run Python with the virtualenv set as Python's HOME
export PYTHONHOME=$ENV 
exec $PYTHON "$@"

but it just used the system python.Can't use the lib in anaconda.
I want to use the wx GUI in anaconda,how to solve the problem?

Best Answer

I fixed the issue for my Python 2 and 3 virtual envs by reading this post (see my tip in the followed):

https://blurringexistence.net/wxpython-using-virtualenvwrapper-on-osx.html

My environment is:

macOS 10.12.5
Python 2 installed by Homebrew
- wxPython installed through: brew insstall wxpython
Python 3 installed by Homebrew
- wxPython installed through: gpip3 install wxpython (the global PIP for Python 3)

Tips:

You could modify the script in that post to work for Python 3.
You should set "PYTHONHOME" in the "activate" file instead of "postactivate" if you DO NOT use virtualenvwrapper.

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Python – Why can’t Python parse this JSON data

Your data is not valid JSON format. You have [] when you should have {}:

[] are for JSON arrays, which are called list in Python
{} are for JSON objects, which are called dict in Python

Here's how your JSON file should look:

{
    "maps": [
        {
            "id": "blabla",
            "iscategorical": "0"
        },
        {
            "id": "blabla",
            "iscategorical": "0"
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    "masks": {
        "id": "valore"
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    "om_points": "value",
    "parameters": {
        "id": "valore"
    }
}

Then you can use your code:

import json
from pprint import pprint

with open('data.json') as f:
    data = json.load(f)

pprint(data)

With data, you can now also find values like so:

data["maps"][0]["id"]
data["masks"]["id"]
data["om_points"]

Try those out and see if it starts to make sense.

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