Install Python with NumPy SciPy Matplotlib on Windows

How to install Python 3 with NumPy SciPy Matplotlib on Windows.
Everything is deployed in a virtual environment.

Text version of the video:

[srinivasshegde]

just opened this video, from a tutorial website, to like this video.
Good job, helped me.

[cleiades]

Thank you so much. You are a lifesaver

[slackbabo]

If you have python installed, tutorial starts at 1:25

[PratikTiwari]

I am getting error which says that "exception While downloading scipy and matplotlib"

[karls]

I created my work environment at C:\Users\..\DEV>python -m venv work

But it cannot found...

[tonyrusignuolo]

Running from the terminal works fine, but trying to write and run python files breaks with the following error:
Traceback (most recent call last):
File "np.py", line 1, in <module>
import numpy as np
File "C:\Users\Tony the Potato\AppData\Roaming\Python\Python36\site-packages\numpy\__init__.py", line 142, in <module>
from . import core
File "C:\Users\Tony the Potato\AppData\Roaming\Python\Python36\site-packages\numpy\core\__init__.py", line 23, in <module>

File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python36_64\lib\ctypes\__init__.py", line 348, in __init__
self._handle = _dlopen(self._name, mode)
OSError: [WinError 193] %1 is not a valid Win32 application


Any idea why?

[moradlakhssassi]

Thanks very much, it xas helpfull, I just did all these instructions. But when lunching IDLE from windows, and then running a python file, a python shell comes, and no python command works, it seems like IDLE doesn't recognize python !
Is this because IDLE can't reach the DEV folder?

NB: this is the error message on the IDLE shell when I type "import numpy as np":

Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
import numpy as np
ModuleNotFoundError: No module named 'numpy'

Can you please help me?