I am trying to learn FLASK. I am just following this tutorial . I have already created a venv for kivy, and all went right. But now I am learning flask and in CMD, when I pass:
pip install virtualenv
it outputs:
Requirement already satisfied: virtualenv in c:\users\new\appdata\local\programs\python\python39-32\lib\site-packages (20.3.0)
Requirement already satisfied: appdirs<2,>=1.4.3 in c:\users\new\appdata\roaming\python\python39\site-packages (from virtualenv) (1.4.4)
Requirement already satisfied: six<2,>=1.9.0 in c:\users\new\appdata\roaming\python\python39\site-packages (from virtualenv) (1.15.0)
Requirement already satisfied: filelock<4,>=3.0.0 in c:\users\new\appdata\roaming\python\python39\site-packages (from virtualenv) (3.0.12)
Requirement already satisfied: distlib<1,>=0.3.1 in c:\users\new\appdata\roaming\python\python39\site-packages (from virtualenv) (0.3.1)
Then I used:
mkdir newproj
cd newproj
At last:
virtualenv venv
And it said:
Fatal error in launcher: Unable to create process using '"c:\program files\python39-32\python.exe"
"C:\Program Files\Python39-32\Scripts\virtualenv.exe" ': The system cannot find the file specified.
I tried adding "C:\Program Files\Python39-32\Scripts\virtualenv.exe" to path. But it did not work. How do I fix this?
as of python 3.3 , python is shipped with its built-in virtual environment module venv
, it's the official, the standard, the recommended and the difacto module.
refer to: https://docs.python.org/3/library/venv.html#module-venv
so you don't even need to install any 3rd module like virtualenv
, pipenv
.. to create and manage your virtual environments.
C:\> mkdir newproj
C:\> cd newproj
venv
)C:\newproj> py -m venv venv
C:\newproj> venv\Scripts\activate
(venv) C:\newproj> pip list
(venv) C:\newproj> pip install flask flask-login ..
(venv) C:\newproj> deactivate
C:\newproj>
Try to use:
python3 -m virtualenv venv
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