Learn Python: pipenv

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#1

Hello,
Watching Learn Python 3, pipenv video (https://www.codecademy.com/courses/learn-python-3/videos/learn-python3-pipenv) and stuck at creating virtual env. I installed the latest Python version, in CMD I installed pipenv using pip. After that I installed VS Code with Python extension. First I created a new folder. In this folder, I created venv and installed numpy module. Then I type pipenv shell and python3. When I try to import numpy, it gives and error:

>>> import numpy
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'numpy'

Pipfile:

[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"

[packages]
numpy = "*"

[dev-packages]

[requires]
python_version = "3.9"

Screenshot_1
Screenshot_11919×1042 55.4 KB

Please, help. I was googling it for almost 2 hours, reinstalled python an pip and it’s not helping.

#2

Did you activate the venv you installed numpy in?

Something like

$ source venv/bin/activate
#in the directory of target venv
#3

To activate it said to run

pipenv shell
#4

Ah yes, sorry, I’m thinking of regular venv.

The question stands though, did you activate it in the same directory before running the file?

#5

Here’s a screenshot of my steps

Screenshot_2
Screenshot_21919×1039 80.5 KB

#6

Screen Shot 2021-02-09 at 3.12.07 PM

Check your spelling of pipenv

#7

I fixed it below in the code

#8

I think this is what’s happening: You need to activate your environment before the install. Otherwise it’s installing outside the environment. (I don’t use pipenv, I use venv. So the details might be off on this, but it’s vaguely the same gist)

Order of operations:

  • create a new virtual environmnet $ pipenv --python 3.7
  • activate it $ pipenv shell
  • install numpy $ pipenv install numpy
  • run python to test and import numpy
$ python
>>> import numpy

You can also type pipenv -h for help

1 Like
#9

OMG, at last, it’s working. Thanks a lot for your help!

2 Likes
#10

Great! Virtual environments were one of the hardest things when I started out with python.

1 Like