# Help while installing upgraded version of python **URL:** \ **Category:** Curriculum Help\ **Tags:** python\ **Created:** [October 7, 2020, 1:17pm UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495 "2020-10-07T13:17:31Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![mukeshgurpude](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/mukeshgurpude/32/180919_2.png) [@mukeshgurpude](https://forum.freecodecamp.org/u/mukeshgurpude)\ **Post date:** [October 7, 2020, 1:17pm UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/1 "2020-10-07T13:17:31Z")
This is not really related to the curriculum.. I’ve installed python3.9 yesterday on my windows 10.. Before installing I kept note of all the installed packages using `pip freeze>req.txt`. Now after installing v3.9 I uninstalled python3.8.6 from `control-panel>programs`. it was all fine but I lost my installed packages. So, today I was going to install all the packages with `pip install -r req.txt` but pip gave me error.. I fixed it by following folks on Stack Overflow, by deleting python38 directory.. But I’m unable to install them , I came across following error ![image](https://global.discourse-cdn.com/freecodecamp/original/3X/b/0/b01384d652d09511c346f3674311e3077a5afa06.png) It would be good if someone guide me through whole procedure of shifting to another python version.. ---
**Author:** ![gururajankappa](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/gururajankappa/32/227426_2.png) [@gururajankappa](https://forum.freecodecamp.org/u/gururajankappa)\ **Post date:** [October 7, 2020, 4:48pm UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/2 "2020-10-07T16:48:41Z")
Delete python Download python from their website. One version old , just to show you the process Then upgrade via the cmd line. Do not delete the previous version. Upgrade pip as well I asked u to install the previous version just to show u the process. U don’t need to do it. But u have to do it this time Upgrade pip if there’s an update. Next time u want to upgrade just Run the command to upgrade python version. If it prompts to update the pip version just do it. Hope It helps 😀 ---
**Author:** ![jdelarubia](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/jdelarubia/32/174787_2.png) [@jdelarubia](https://forum.freecodecamp.org/u/jdelarubia)\ **Post date:** [October 7, 2020, 9:11pm UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/3 "2020-10-07T21:11:26Z")
Hi @mukeshgurpude, It seems like it’s trying to use some cached version of your libraries. This issue is not new on Windows 10 [see this] ([https://github.com/pypa/pip/issues/8272](https://github.com/pypa/pip/issues/8272)). Since Python 3.9 is ery new, it may introduce conflicting behaviours or incompatibilities with some of the libraries you have installed in your system. Before considering rolling back to a 3.8.x version, I would try to completely remove all trace of python by uninstalling from the Control Panel as you did, AND, physically deleting the folders; specially `site-packages`. This would permit you a clean install. the caveat is, if you have python programs you need for some other tasks, you will need to reinstall their dependencies too! Cheers, ---
**Author:** ![mukeshgurpude](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/mukeshgurpude/32/180919_2.png) [@mukeshgurpude](https://forum.freecodecamp.org/u/mukeshgurpude)\ **Post date:** [October 8, 2020, 6:05am UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/4 "2020-10-08T06:05:03Z")
> [@gururajankappa](#): > > Then upgrade via the cmd line How to upgrade python itself from command line, I’m unable to found such command in windows… Please guide me… > [@jdelarubia](#): > > reinstall their dependencies too do you mean `external packages`, right? ---
**Author:** ![jdelarubia](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/jdelarubia/32/174787_2.png) [@jdelarubia](https://forum.freecodecamp.org/u/jdelarubia)\ **Post date:** [October 8, 2020, 7:03am UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/5 "2020-10-08T07:03:36Z")
> [@mukeshgurpude](#): > > do you mean `external packages` , right? Yes, exactly, your apps’ dependencies. About upgrading python from the command line, there is no way on Windows to my knowledge if you use the standard installable from [python.org](http://python.org). On a Mac, you can do this via `homebrew`. Maybe this is the way @gururajankappa refers to. ---
**Author:** ![mukeshgurpude](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/mukeshgurpude/32/180919_2.png) [@mukeshgurpude](https://forum.freecodecamp.org/u/mukeshgurpude)\ **Post date:** [October 8, 2020, 7:38am UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/6 "2020-10-08T07:38:09Z")
Reinstalled python cleared python39 folder in appdata, but still same problem ![image](https://global.discourse-cdn.com/freecodecamp/original/3X/3/4/34bfe32f5cef9ceb95663ab870e1243fabecc585.png) ---
**Author:** ![jdelarubia](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/jdelarubia/32/174787_2.png) [@jdelarubia](https://forum.freecodecamp.org/u/jdelarubia)\ **Post date:** [October 8, 2020, 8:14am UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/7 "2020-10-08T08:14:02Z")
Hi @mukeshgurpude, I made the following 2 tests. I first installed `numpy` on a virtual environment under python 3.8.5 and it worked. ![screenshot.6](https://global.discourse-cdn.com/freecodecamp/original/3X/1/2/121851e22c5f42389198a62076fb40e22c331172.png) Then, I tried running the same configuration on a `Docker` container and it failed. ![screenshot.7](https://global.discourse-cdn.com/freecodecamp/original/3X/2/1/2164e575d036ec84e7b0929fd1d815ea526af6c1.png) This is a Linux debian image, so Windows is not the problem. I think there is some incompatibility between python 3.9 and numpy. Can you downgrade to a earlier version of python? (You may want to wait until `numpy` release an update) ---
**Author:** ![mukeshgurpude](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/mukeshgurpude/32/180919_2.png) [@mukeshgurpude](https://forum.freecodecamp.org/u/mukeshgurpude)\ **Post date:** [October 8, 2020, 9:01am UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/8 "2020-10-08T09:01:25Z")
> [@jdelarubia](#): > > python 3.9 and numpy Actually, not only numpy there are many packages not optimized for python3.9… Now I understood the importance of virtual environments for each project. ---
**Author:** ![mukeshgurpude](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/mukeshgurpude/32/180919_2.png) [@mukeshgurpude](https://forum.freecodecamp.org/u/mukeshgurpude)\ **Post date:** [October 8, 2020, 9:59am UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/9 "2020-10-08T09:59:46Z")
![image](https://global.discourse-cdn.com/freecodecamp/original/3X/5/0/50310a034985ac2246b3d6e26f32c9aa94d6d852.png) > [@jdelarubia](#): > > You may want to wait until `numpy` release an update) Is there a way to get notified about the package updates?? ---
**Author:** ![jdelarubia](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/jdelarubia/32/174787_2.png) [@jdelarubia](https://forum.freecodecamp.org/u/jdelarubia)\ **Post date:** [October 8, 2020, 10:08am UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/10 "2020-10-08T10:08:45Z")
You can “watch” their [Github](https://github.com/numpy/numpy). I can’t think of nothing better right now, sorry! But, this way, you’ll see on your Github “feed” when they release a new version. ---
**Author:** ![ILM](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/ilm/32/363239_2.png) [@ILM](https://forum.freecodecamp.org/u/ILM)\ **Post date:** [June 1, 2021, 6:29pm UTC](https://forum.freecodecamp.org/t/help-while-installing-upgraded-version-of-python/424495/11 "2021-06-01T18:29:17Z")