Develop Reference

Failed to establish a new connection in wsl when i use pip install

I want to install flask-sqlalchemy within the virtual environment on my ubuntu subsystem (WSL) on Windows 11, using the following command:
pip install flask-sqlalchemy
however i recieve an error in console window.
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7ff5c27dff10>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/flask-sqlalchemy/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7ff5c2620280>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/flask-sqlalchemy/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7ff5c2620520>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/flask-sqlalchemy/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7ff5c26206d0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/flask-sqlalchemy/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7ff5c2620880>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/flask-sqlalchemy/
ERROR: Could not find a version that satisfies the requirement flask-sqlalchemy (from versions: none)
ERROR: No matching distribution found for flask-sqlalchemy
I think it is related with network connection in my Ubuntu subsystem. I try on Standalone Linux system and it seems to be work. How i can solve this issue?

i finnaly resolve my issue. I post below steps to solve this problem.
I checked my fireewall settings. It was not an issue.
i dont use proxy so i skipped the proxy issue.
i checked ping from the console window
ping google.com
it displayed
ping: google.com: Temporary failure in name resolution
I found a solution. Seems like my DNS server can't find an address associated to the URL i am passing. I got errors because the resolv.conf file was not set up in my Ubuntu Subsystem.
solution:
in wsl Ubuntu Linux type commamnd
sudo nano /etc/resolv.conf
add nameserver and save file
nameserver 8.8.8.8

A pip subprocess error when I create an environment for one project in its root folder

Running Ubuntu 18.04 LTS as WSL2 on Win10, I need to create an environment to install Devito on my system. So, in a root folder of this project I do:
(base) quant#NB-W-I-NIKONENKO:~/devito$ conda env create -f environment-dev.yml
and get this:
Collecting package metadata (repodata.json): done
Solving environment: done
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
Installing pip dependencies: \ Ran pip subprocess with arguments:
['/home/quant/anaconda3/envs/devito/bin/python', '-m', 'pip', 'install', '-U', '-r', '/home/quant/devito/condaenv.r9s6c4x4.requirements.txt']
Pip subprocess output:
Requirement already satisfied: pip>=9.0.1 in /home/quant/anaconda3/envs/devito/lib/python3.9/site-packages (from -r /home/quant/devito/requirements.txt (line 1)) (21.2.4)
Pip subprocess error:
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c959d970>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c959d5b0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c959df10>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c95c5100>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c95c52b0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/pip/
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c8f2bc10>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c8f2be20>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c8f32040>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c8f321c0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f27c8f32370>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
ERROR: Could not find a version that satisfies the requirement numpy>1.16 (from versions: none)
ERROR: No matching distribution found for numpy>1.16
failed
CondaEnvException: Pip failed
The next installation commands should be:
source activate devito
which works, and the next:
pip install -e .
which shows the following:
Obtaining file:///home/quant/devito
Requirement already satisfied: pip>=9.0.1 in /home/quant/anaconda3/envs/devito/lib/python3.9/site-packages (from devito==4.6.2+60.g9b765d0d6) (21.2.4)
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fa7509e1040>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fa750a4d9d0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fa750a4d880>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fa750a4d190>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7fa750a4dca0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/numpy/
ERROR: Could not find a version that satisfies the requirement numpy>1.16 (from devito) (from versions: none)
ERROR: No matching distribution found for numpy>1.16
So, I can not install the package correctly and implement the final command:
conda update - all –yes
I noticed that base Python version is 3.7.6 and after the source activation python version is 3.9.7 (I am not sure if it helps but I really struggled with this problem).
Here is the link for installation instructions for the Devito
https://medium.com/#soulfoodpst/install-devito-on-windows-a-tool-for-automatic-programming-3def3949e5c8

Build python project as package without internet access

I have a python project I want to package. I can package the project with python -m build just fine when connected to the internet.
When I disconnect and try the same command, I get an error about pip being unable to find the package wheel:
(my-venv) [me#my-host my-project]$ python -m build
* Creating venv isolated environment...
* Installing packages in isolated environment... (setuptools>=42, wheel)
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f5935bb4f10>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/wheel/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f5935b5a160>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/wheel/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f5935b5a310>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/wheel/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f5935b5a4c0>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/wheel/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f5935b5a670>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/wheel/
ERROR: Could not find a version that satisfies the requirement wheel
ERROR: No matching distribution found for wheel
This happens even if I install setuptools and wheel first.
How can I build my project without needing internet access at the time of building? Can I somehow make the isolated environment use my python cache?

Fix " Could not find a version that satisfies the requirement boto3 (from versions: ) No matching distribution found for boto3"

I'm struggling installing installing Boto3 library.
Python version: 3.6.12
pip version 9.0.1
Server: Redhat 7.9 (Maipo) , Fedora.
I tried different comibnation to get the boto3 library:
pip3 install boto3
pip3 install boto
pip3 install --extra-index-url https://pypi.python.org/simple boto3
but always I have the same error.
Any idea?
My code:
sla82716:/home/pa009999/scriptDirectory $ pip3 install boto
Collecting boto
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f8fb0f74e10>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto/
Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f8fb0f74208>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto/
Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f8fb0f742b0>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto/
Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f8fb0f74320>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto/
Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f8fb0f743c8>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto/
Could not find a version that satisfies the requirement boto (from versions: )
No matching distribution found for boto
sla82716:/home/pa009999/scriptDirectory $ pip3 install boto3
Collecting boto3
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f08a5642f98>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f08a5642438>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f08a5642400>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f08a56420b8>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f08a5642630>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Could not find a version that satisfies the requirement boto3 (from versions: )
No matching distribution found for boto3
sla82716:/home/pa009999/scriptDirectory $ pip3 install --extra-index-url https://pypi.python.org/simple boto3
Collecting boto3
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f5456b85358>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f5456b85828>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f5456b85898>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f5456b85ef0>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f5456b85198>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/boto3/
Could not find a version that satisfies the requirement boto3 (from versions: )
No matching distribution found for boto3

It looks like you cannot resolve the hostname. Try adding the following line (Google nameserver)
nameserver 8.8.8.8
to the /etc/resolv.conf file (e.g., by using nano /etc/resolv.conf). You can only add three nameservers, so you might have to delete/change one line if there are already three nameservers in the file.
Afterwards, ping google.com should work and pip install boto3 as well.

Getting error while building docker image

My Docker file is
FROM python:3
ADD myapp.py /
RUN pip3 install tensorflow-gpu
RUN pip3 install numpy
RUN pip3 install pandas
CMD ["python3", "./myapp.py]
When I build the docker image using
docker build -t gaurav .
I get the following errors
Step 4/5 : RUN pip3 install tensorflow-gpu
---> Running in 8f938c75e2e0
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7fae543d7cd0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/tensorflow-gpu/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7fae543d79d0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/tensorflow-gpu/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7fae543d7220>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/tensorflow-gpu/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7fae543d7640>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/tensorflow-gpu/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x7fae543d7790>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')': /simple/tensorflow-gpu/
ERROR: Could not find a version that satisfies the requirement tensorflow-gpu (from versions: none)
ERROR: No matching distribution found for tensorflow-gpu
The command '/bin/sh -c pip3 install tensorflow-gpu' returned a non-zero code: 1
Can you help me here, I want to install all these packages, but I can't get past these errors.

https://github.com/tensorflow/tensorflow/issues/33374 - tensorflow is not available for python3.8 so you have to use python image with version 3.7 or lower:
FROM python:3.7

As stated here Tensorflow - requirements.
Tensorflow is supported only Python 3.5–3.7