New Version Problem

[SamIam]

Want to find a way to move all modules from old version of python to new version without have install all again.

Thanks in advance

[Larz60+]

what is:

• Old version
  
• New version
  

need version numbers from --> to

[snippsat]

pip freeze can be dumped into a requirements.txt file and used later to re-construct the frozen environment.

pip freeze > frozen-requirements.txt

Then:

pip install -r frozen-requirements.txt

This make same 3-party dependencies installed as you had in the original environment where you generated the frozen-requirements.txt.

pip make easy now so don't need to worry so much about this,
it's also common to start from scratch in a virtual environment(build into Python venv)
Then install dependencies needed for the project.

[SamIam]

python 3.6.6 to 3.8.1

[snippsat]

python 3.6.6 to 3.8.1

Are you familiar with pip and is that what you used to installed with?
Then it work as i posted.
So can do it like this,this bypass any settings in Windows environment Path.

c:\python36\Scripts
# See that point to 3.6
λ pip -V
pip 10.0.1 from c:\python36\lib\site-packages\pip (python 3.6)

c:\python36\Scripts
λ pip freeze
allure-pytest==2.3.4b1
allure-python-commons==2.3.4b1
altgraph==0.15 
.....

# Write to file
pip freeze > frozen-requirements.txt

Copy frozen-requirements.txt to Scripts folder of 3.8
Then do:

c:\Python38\Scripts
# See that point to 3.8
λ pip -V
pip 19.3.1 from c:\python38\lib\site-packages\pip (python 3.8)

# Install all 3.6 3-party modules
c:\Python38\Scripts
λ pip install -r frozen-requirements.txt

As a note so do i use cmder,the command used work just the same in cmd.

[SamIam]

Thank you