Hello all I am trying to install prefect 2 0 `pip install U

Question

Hello all I am trying to install prefect 2 0 `pip install U prefect==2 0b1 ` and I am encountering below error my machine `Ubuntu 20 04 4 LTS`

Kevin Kho · Answer

I think this is related to installing ray Are you able to pip install ray Also you should use 2 0b3 and ray will be removed as a dependency in future releases

Anna Geller · Answer

You can try this on Ubuntu 20 04 LTS ```sudo apt get update y sudo apt get upgrade y sudo apt get install software properties common y sudo apt get install python3 dateutil y sudo apt install python3 pip y pip3 install U prefect gt =2 0b ``` this has worked for me on this Ubuntu version we also use Ubuntu in our internal CI for Prefect 2 0 so I m sure we can resolve that

Anna Geller · Answer

Moving your code to the thread ```Building wheel for gpustat setup py error ERROR Command errored out with exit status 1 command home kku work poc ML envml bin python3 u c import sys setuptools tokenize sys argv 0 = tmp pip install 9ja32lqx gpustat setup py file = tmp pip install 9ja32lqx gpustat setup py f=getattr tokenize open open file code=f read replace r n n f close exec compile code file exec bdist wheel d tmp pip wheel dsmxk9l4 cwd tmp pip install 9ja32lqx gpustat Complete output 7 lines WARNING The wheel package is not available usage setup py global opts cmd1 cmd1 opts cmd2 cmd2 opts or setup py help cmd1 cmd2 or setup py help commands or setup py cmd help error invalid command bdist wheel ERROR Failed building wheel for gpustat Running setup py clean for gpustat Building wheel for nvidia ml py3 setup py error ERROR Command errored out with exit status 1 command home kku work poc ML envml bin python3 u c import sys setuptools tokenize sys argv 0 = tmp pip install 9ja32lqx nvidia ml py3 setup py file = tmp pip install 9ja32lqx nvidia ml py3 setup py f=getattr tokenize open open file code=f read replace r n n f close exec compile code file exec bdist wheel d tmp pip wheel 851neiik cwd tmp pip install 9ja32lqx nvidia ml py3 Complete output 6 lines usage setup py global opts cmd1 cmd1 opts cmd2 cmd2 opts or setup py help cmd1 cmd2 or setup py help commands or setup py cmd help error invalid command bdist wheel ERROR Failed building wheel for nvidia ml py3 Running setup py clean for nvidia ml py3 Failed to build gpustat nvidia ml py3 ERROR httpcore 0 14 7 has requirement h11 lt 0 13 gt =0 11 but you ll have h11 0 13 0 which is incompatible ```

kushagra kumar · Answer

1 Deleted existing virtual environment 2 Created a new virtual env 3 activated the virtual env ```4 Ran below commands as suggested added in a sh script and ran sudo apt get update y sudo apt get upgrade y sudo apt get install software properties common y sudo apt get install python3 dateutil y sudo apt install python3 pip y pip3 install U prefect gt =2 0b ``` I don t see the previous errors but I can see below error ```ERROR kubernetes 23 6 0 has requirement pyyaml gt =5 4 1 but you ll have pyyaml 5 3 1 which is incompatible ERROR httpcore 0 14 7 has requirement h11 lt 0 13 gt =0 11 but you ll have h11 0 13 0 which is incompatible ``` Also got some logs that I don t know if that s an issue ```Attempting uninstall pytz Found existing installation pytz 2019 3 Not uninstalling pytz at usr lib python3 dist packages outside environment usr Can t uninstall pytz No files were found to uninstall Attempting uninstall cryptography Found existing installation cryptography 2 8 Not uninstalling cryptography at usr lib python3 dist packages outside environment usr Can t uninstall cryptography No files were found to uninstall Attempting uninstall click Found existing installation Click 7 0 Not uninstalling click at usr lib python3 dist packages outside environment usr Can t uninstall Click No files were found to uninstall Attempting uninstall protobuf Found existing installation protobuf 3 6 1 Not uninstalling protobuf at usr lib python3 dist packages outside environment usr Can t uninstall protobuf No files were found to uninstall Attempting uninstall MarkupSafe Found existing installation MarkupSafe 1 1 0 Not uninstalling markupsafe at usr lib python3 dist packages outside environment usr Can t uninstall MarkupSafe No files were found to uninstall ```

Anna Geller · Answer

I see thanks Can you try <https discourse prefect io t getting started with cloud 2 0 using ec2 instance as the execution layer 551|this tutorial> It s for Cloud 2 0 and Ubuntu 20 04 LTS and it worked well for me

kushagra kumar · Answer

I could only follow below steps from the tutorial as I don t have EC2 instance ```sudo apt get update y sudo apt get upgrade y sudo apt get install software properties common y sudo apt get install python3 dateutil y sudo apt install python3 pip y sudo apt install y PATH= $HOME local bin $PATH export PATH pip3 install U prefect gt =2 0b supervisor``` Sharing part of the log Also I deleted the previous virtual env and started fresh ```The following packages have unmet dependencies Depends containerd gt = 1 2 6 0ubuntu1~ E Unable to correct problems you have held broken packages Collecting prefect gt =2 0b Using cached prefect 2 0b3 py3 none any whl 1 4 MB continued Requirement already satisfied skipping upgrade googleapis common protos lt 2 0dev gt =1 52 0 in usr local lib python3 8 dist packages from google api core =2 0 =2 1 =2 2 =2 3 0 lt 3 0 0dev gt =1 31 5 gt google cloud storage gt =2 1 0 gt prefect gt =2 0b 1 56 0 Requirement already satisfied skipping upgrade wcwidth gt =0 1 4 in usr local lib python3 8 dist packages from blessed gt =1 17 1 gt gpustat gt =1 0 0b1 extra == default gt ray default gt =1 9 python version lt 3 10 and platform machine == x86 64 gt prefect gt =2 0b 0 2 5 Requirement already satisfied skipping upgrade pyasn1 lt 0 5 0 gt =0 4 6 in usr local lib python3 8 dist packages from pyasn1 modules gt =0 2 1 gt google auth gt =1 0 1 gt kubernetes gt =17 17 0 gt prefect gt =2 0b 0 4 8 Installing collected packages prefect Successfully installed prefect 2 0b3``` Now the problem is that even though the prefect is installed I am getting `ModuleNotFoundError` ``` env kku KKU ~ work prefect poc$ prefect version 2 0b3 env kku KKU ~ work prefect poc$ python car linearregression py Traceback most recent call last File car linearregression py line 13 in lt module gt from prefect import flow task ModuleNotFoundError No module named prefect ```

Anna Geller · Answer

I see hard to say why this didn t work really in general if you need infrastructure support we have a <https discourse prefect io t how to get in touch with prefect professional services 275|paid support> that could help with calls screenshare etc just mentioning it in case you may be interested

Anna Geller · Answer

but for your issue this might be something off with the Python version or Ray installation definitely worth cross checking all that and in the worst case trying a fresh new conda installation if nothing else works

kushagra kumar · Answer

`Python 3 8 10` `ray version 1 12 0`

Anna Geller · Answer

Thanks All I can recommend for now is trying a fresh conda env trying installing Ray etc separately from Prefect I will communicate with the team whether we can push the change separating out dependencies for Ray and Dask so the installation may get easier soon Keep us posted on how it goes and I ll keep you posted if I hear anything from the team regarding dependency separation

Anna Geller · Answer

and regarding the error ```ModuleNotFoundError No module named prefect ``` it s an issue with the PYTHONPATH try <https discourse prefect io t i got an error prefect command not found how to fix that 764|this>