Unable to install python 3.8 windows 10

[tolstislon]

Windows 10 Python 3.8

(untitled1) D:\python_other\untitled1>pip install psycopg2-binary
Collecting psycopg2-binary
  Using cached https://files.pythonhosted.org/packages/80/91/91911be01869fa877135946f928ed0004e62044bdd876c1e0f12e1b5fb90/psycopg2-binary-2.8.3.tar.gz
    ERROR: Command errored out with exit status 1:
     command: 'c:\users\user\.virtualenvs\untitled1-lq2ited9\scripts\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\user\\AppData\\Local\\Temp\\pip-ins
tall-9839um0z\\psycopg2-binary\\setup.py'"'"'; __file__='"'"'C:\\Users\\user\\AppData\\Local\\Temp\\pip-install-9839um0z\\psycopg2-binary\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"
'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\user\AppData\Local\Temp\
pip-install-9839um0z\psycopg2-binary\pip-egg-info'
         cwd: C:\Users\user\AppData\Local\Temp\pip-install-9839um0z\psycopg2-binary\
    Complete output (23 lines):
    running egg_info
    creating C:\Users\user\AppData\Local\Temp\pip-install-9839um0z\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info
    writing C:\Users\user\AppData\Local\Temp\pip-install-9839um0z\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\PKG-INFO
    writing dependency_links to C:\Users\user\AppData\Local\Temp\pip-install-9839um0z\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\dependency_links.txt
    writing top-level names to C:\Users\user\AppData\Local\Temp\pip-install-9839um0z\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\top_level.txt
    writing manifest file 'C:\Users\user\AppData\Local\Temp\pip-install-9839um0z\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\SOURCES.txt'
    
    Error: pg_config executable not found.
    
    pg_config is required to build psycopg2 from source.  Please add the directory
    containing pg_config to the $PATH or specify the full executable path with the
    option:
    
        python setup.py build_ext --pg-config /path/to/pg_config build ...
    
    or with the pg_config option in 'setup.cfg'.
    
    If you prefer to avoid building psycopg2 from source, please install the PyPI
    'psycopg2-binary' package instead.
    
    For further information please check the 'doc/src/install.rst' file (also at
    <http://initd.org/psycopg/docs/install.html>).
    
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

Windows 10 python 3.7 - Good

[dvarrazzo]

I know

[dvarrazzo]

Appveyor doesn't support Python 3.8 yet.

https://www.appveyor.com/docs/windows-images-software/#python

Support for Python 3.8 on Windows will be added when appveyor will add it.

[heckad]

When does Appveyor usually add a new version of python?

[FrankyBoy]

So ... what do you need to fix this?

[dvarrazzo]

@FrankyBoy That either appveyor makes 3.8 available on their machine, or that someone contributes a patch to the appveyor.py script to install it ourselves.

[FrankyBoy]

Hi! Sorry for potentially stupid questions, new to python and appveyor (mainly did c# on gitlab-ci lately). Regarding that script you mentioned, am I correct that this would be some solution akin to this here: installing pypy on appveyor? Also, if I adapt the script, how can I actually test it before making a PR?

[jamadden]

Python 3.8 is now available on AppVeyor (appveyor/ci#3142). (Where, incidentally, I have the same issue as #1006)

[dvarrazzo]

Packages released.

https://pypi.org/project/psycopg2/2.8.4/#files

[hingston]

pip uninstall psycopg2-binary
pip install psycopg2-binary --no-cache-dir

[Kylotan]

It's not clear whether this is closed because it's believed the problem is fixed, but... it's not. Trying to install either psycopg2 or psycopg2-binary on Windows via Pip will error out with a message saying "Error: pg_config executable not found."

[jerickso]

@Kylotan, the problem is fixed. My guess is you are inadvertently reinstalling the cached version of the previous package. @hingston provided the correct steps by adding the parameter:
--no-cache-dir
onto the pip command line.

You can verify pip is using a cache file if it displaying the following after running the pip install command:

C:\Python38\Scripts>pip install psycopg2-binary
Collecting psycopg2-binary
  Using cached <url>

[sckol]

For me also doesn't work. For a fresh Python 3.8 installation I have:

pip install psycopg2-binary --no-cache-dir
Collecting psycopg2-binary
  Downloading https://files.pythonhosted.org/packages/00/7b/a623f49b3248957e7eaaac52eba1117209775d54e7a8501c460473a7ba4f/psycopg2-binary-2.8.4.tar.gz (378kB)
    100% |████████████████████████████████| 378kB 2.6MB/s
    Complete output from command python setup.py egg_info:
    running egg_info
    creating pip-egg-info\psycopg2_binary.egg-info
    writing pip-egg-info\psycopg2_binary.egg-info\PKG-INFO
    writing dependency_links to pip-egg-info\psycopg2_binary.egg-info\dependency_links.txt
    writing top-level names to pip-egg-info\psycopg2_binary.egg-info\top_level.txt
    writing manifest file 'pip-egg-info\psycopg2_binary.egg-info\SOURCES.txt'

    Error: pg_config executable not found.

[Kylotan]

Nope, sorry.

Microsoft Windows [Version 10.0.17763.864]
(c) 2018 Microsoft Corporation. All rights reserved.

(venv) E:\code\pyprojects\MusicNewsSite>pip install psycopg2-binary --no-cache-dir
Collecting psycopg2-binary
  Downloading https://files.pythonhosted.org/packages/00/7b/a623f49b3248957e7eaaac52eba1117209775d54e7a8501c460473a7ba4f/psycopg2-binary-2.8.4.tar.gz (378kB)
    100% |████████████████████████████████| 378kB 7.3MB/s
    Complete output from command python setup.py egg_info:
    running egg_info
    creating pip-egg-info\psycopg2_binary.egg-info
    writing pip-egg-info\psycopg2_binary.egg-info\PKG-INFO
    writing dependency_links to pip-egg-info\psycopg2_binary.egg-info\dependency_links.txt
    writing top-level names to pip-egg-info\psycopg2_binary.egg-info\top_level.txt
    writing manifest file 'pip-egg-info\psycopg2_binary.egg-info\SOURCES.txt'

    Error: pg_config executable not found.

    pg_config is required to build psycopg2 from source.  Please add the directory
    containing pg_config to the $PATH or specify the full executable path with the
    option:

        python setup.py build_ext --pg-config /path/to/pg_config build ...

    or with the pg_config option in 'setup.cfg'.

    If you prefer to avoid building psycopg2 from source, please install the PyPI
    'psycopg2-binary' package instead.

    For further information please check the 'doc/src/install.rst' file (also at
    <http://initd.org/psycopg/docs/install.html>).


    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:\Users\Ben\AppData\Local\Temp\pip-install-cc5xb110\psycopg2-binary\

[dvarrazzo]

As far as I can see psycopg2-2.8.4-cp38-cp38-win_amd64.whl is there, at https://pypi.org/project/psycopg2/#files
Please someone debug why pip decides not to pick it up, thank you.

[jerickso]

It works for me with both 32bit and 64bit binaries from Python.org, so there is something with your setup that is forcing it to download the source file package instead of the binary package.

One could try the following pip switch to force not use source packages, tho it doesn't explain why it is attempting to download the sources, and I half way expect this not to work, tho hopeful the error message may explain more of what is going on:
--only-binary :all:

If the above doesn't work, issue the following command and copy the output:
pip debug psycopg2-binary --verbose

For reference, here is what I get when using Python 3.8 (x64) installed from python.org:

c:\bin\Python38\Scripts>pip install psycopg2-binary --no-cache-dir
Collecting psycopg2-binary
  Downloading https://files.pythonhosted.org/packages/d4/1e/28aed558a39b8e98b4861d97c5326eb6ef0d4eaa13819607a60a34ea6143/psycopg2_binary-2.8.4-cp38-cp38-win_amd64.whl (1.1MB)
     |████████████████████████████████| 1.1MB 1.3MB/s
Installing collected packages: psycopg2-binary
Successfully installed psycopg2-binary-2.8.4

Even using venv it works as expected:

H:\prj\python>C:\bin\Python38\python -m venv test

H:\prj\python>test\Scripts\activate

(test) H:\prj\python>pip list
Package    Version
---------- -------
pip        19.2.3
setuptools 41.2.0
WARNING: You are using pip version 19.2.3, however version 19.3.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

(test) H:\prj\python>pip install psycopg2-binary --no-cache-dir
Collecting psycopg2-binary
  Downloading https://files.pythonhosted.org/packages/d4/1e/28aed558a39b8e98b4861d97c5326eb6ef0d4eaa13819607a60a34ea6143/psycopg2_binary-2.8.4-cp38-cp38-win_amd64.whl (1.1MB)
     |████████████████████████████████| 1.1MB 1.3MB/s
Installing collected packages: psycopg2-binary
Successfully installed psycopg2-binary-2.8.4
WARNING: You are using pip version 19.2.3, however version 19.3.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

(test) H:\prj\python>

[Kylotan]

Okay, so what I was finding is that pip version 19.0.3 would always fail. I've upgraded pip to 19.3.1, and now it installs the wheel. No idea why this is different, and I couldn't see any bug fixes in the pip release notes that seem relevant.

[jerickso]

Hmm, do you by chance know how you had version 19.0.3 installed? With a fresh installation of Python 3.8 in Windows for me, I have version 19.2.3 on both the 32 and 64 bits. Python 3.7 for me does has pip version 19.0.3, tho.

[kvanzuijlen]

This is the output of --verbose:

    Skipping link https://files.pythonhosted.org/packages/d4/1e/28aed558a39b8e98b4861d97c5326eb6ef0d4eaa13819607a60a34ea6143/psycopg2_binary-2.8.4-cp38-cp38-win_amd64.whl#sha256=b8f490f5fad1767a1331df1259763b3b
ad7d7af12a75b950c2843ba319b2415f (from https://pypi.org/simple/psycopg2-binary/) (requires-python:>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*); it is not compatible with this Python

So somehow, pip doesn't recognize that Python 3.8.1 should be compatible?

Edit: Sorry, it seems my venv + pip + python was somehow corrupted and used a mix of different versions.