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python3 -m build gives ModuleNotFoundError: No module named 'pathlib2'

I am trying to build a Python package, but it gives the following error.
* Creating virtualenv isolated environment...
* Installing packages in isolated environment... (setuptools >= 40.8.0, wheel)
* Getting dependencies for sdist...
Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/pep517/in_process/_in_process.py", line 351, in <module>
main()
File "/usr/local/lib/python3.10/site-packages/pep517/in_process/_in_process.py", line 333, in main
json_out['return_val'] = hook(**hook_input['kwargs'])
File "/usr/local/lib/python3.10/site-packages/pep517/in_process/_in_process.py", line 285, in get_requires_for_build_sdist
return hook(config_settings)
File "/tmp/build-env-eyqolcf7/lib/python3.10/site-packages/setuptools/build_meta.py", line 341, in get_requires_for_build_sdist
return self._get_build_requires(config_settings, requirements=[])
File "/tmp/build-env-eyqolcf7/lib/python3.10/site-packages/setuptools/build_meta.py", line 320, in _get_build_requires
self.run_setup()
File "/tmp/build-env-eyqolcf7/lib/python3.10/site-packages/setuptools/build_meta.py", line 482, in run_setup
super(_BuildMetaLegacyBackend,
File "/tmp/build-env-eyqolcf7/lib/python3.10/site-packages/setuptools/build_meta.py", line 335, in run_setup
exec(code, locals())
File "<string>", line 5, in <module>
ModuleNotFoundError: No module named 'pathlib2'
ERROR Backend subprocess exited when trying to invoke get_requires_for_build_sdist
I have already installed pathlib2. What is the solution?

I have successfully build this in Python3.10. pip3.10 freeze gave me this output
build==0.8.0
packaging==21.3
pep517==0.13.0
pyparsing==3.0.9
tomli==2.0.1

As per the official documentation of the build package, it does not have a stable compatibility
https://pypa-build.readthedocs.io/en/latest/installation.html#compatibility
You can try switching to an older version of python (3.9 recommended) and try again,
ideally, that should solve the error since in traceback, the error seems to originate from setuptools ( which will be automatically reverted back to an older version with a older python version )
NOTE: You will also need to reinstall build in the new python version
Let me know if you face any issues with it.

Using pipenv and briefcase, getting AttributeError for pip module

I'm attempting to briefcase a hello-world type script, from a virtual environment created using pipenv. My original python installation building using Anaconda, though I don't really need it as I don't use any of the scientific computing stack. I am not sure what I'm experiencing is a pipenv error, a pip error, or a briefcase error. If you could help me sort this, I would really appreciate it.
Briefcase
(root) C:\Users\stmwr\Dropbox\SoftwareProjects\helloworld-br\helloworld>python setup.py windows
running windows
Traceback (most recent call last):
File "setup.py", line 73, in <module>
'app_requires': [
File "C:\Users\stmwr\Anaconda3\lib\site-packages\setuptools\__init__.py", line 129, in setup
return distutils.core.setup(**attrs)
File "C:\Users\stmwr\Anaconda3\lib\distutils\core.py", line 148, in setup
dist.run_commands()
File "C:\Users\stmwr\Anaconda3\lib\distutils\dist.py", line 955, in run_commands
self.run_command(cmd)
File "C:\Users\stmwr\Anaconda3\lib\distutils\dist.py", line 973, in run_command
cmd_obj.ensure_finalized()
File "C:\Users\stmwr\Anaconda3\lib\distutils\cmd.py", line 107, in ensure_finalized
self.finalize_options()
File "C:\Users\stmwr\Anaconda3\lib\site-packages\briefcase\windows.py", line 18, in finalize_options
finalized = self.get_finalized_command('app')
File "C:\Users\stmwr\Anaconda3\lib\distutils\cmd.py", line 299, in get_finalized_command
cmd_obj.ensure_finalized()
File "C:\Users\stmwr\Anaconda3\lib\distutils\cmd.py", line 107, in ensure_finalized
self.finalize_options()
File "C:\Users\stmwr\Anaconda3\lib\site-packages\briefcase\app.py", line 123, in finalize_options
pip.utils.ensure_dir(self.download_dir)
AttributeError: module 'pip' has no attribute 'utils'

It's likely that this is an issue with Pipenv not supporting Pip 10 yet; in Pip 10, all internal APIs were moved around, which broke all applications that depended on them. I believe the aim is to have a release out soon.
If you can wait a couple of days and then update Pipenv, that will probably be easiest. If you can't wait, you could try to downgrade Pip to version 9.0.3, which should work again.

Issues installing python package Six (to install Pip)

We recently uninstalled pip to do some cleanup on Mac OS X El Capitan. Now trying to re-install pip.
$ sudo easy_install pip
Traceback (most recent call last):
File "/usr/local/bin/easy_install", line 11, in <module>
sys.exit(main())
File "/Library/Python/2.7/site-packages/setuptools/command/easy_install.py", line 2270, in main
**kw
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 321, in __init__
_Distribution.__init__(self, attrs)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 287, in __init__
self.finalize_options()
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 389, in finalize_options
ep.require(installer=self.fetch_build_egg)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2324, in require
items = working_set.resolve(reqs, env, installer, extras=self.extras)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 859, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (six 1.4.1 (/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python), Requirement.parse('six>=1.6.0'))
Looks like we need to upgrade Six. So:
$ easy_install --upgrade six
Traceback (most recent call last):
File "/usr/local/bin/easy_install", line 11, in <module>
sys.exit(main())
File "/Library/Python/2.7/site-packages/setuptools/command/easy_install.py", line 2270, in main
**kw
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 321, in __init__
_Distribution.__init__(self, attrs)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 287, in __init__
self.finalize_options()
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 389, in finalize_options
ep.require(installer=self.fetch_build_egg)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2324, in require
items = working_set.resolve(reqs, env, installer, extras=self.extras)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 859, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (six 1.4.1 (/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python), Requirement.parse('six>=1.6.0'))
Now it looks like we need to upgrade Six in order to upgrade Six??? Maybe it's just a permissions issue:
$sudo easy_install --upgrade six
Traceback (most recent call last):
File "/usr/local/bin/easy_install", line 11, in <module>
sys.exit(main())
File "/Library/Python/2.7/site-packages/setuptools/command/easy_install.py", line 2270, in main
**kw
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 321, in __init__
_Distribution.__init__(self, attrs)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 287, in __init__
self.finalize_options()
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 389, in finalize_options
ep.require(installer=self.fetch_build_egg)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2324, in require
items = working_set.resolve(reqs, env, installer, extras=self.extras)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 859, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (six 1.4.1 (/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python), Requirement.parse('six>=1.6.0'))
Nope. Same error.
I'm obviously missing something. Can someone shed some light on this?
Tried the first answer:
$ python get-pip.py
Collecting pip
Using cached pip-9.0.1-py2.py3-none-any.whl
Collecting wheel
Using cached wheel-0.29.0-py2.py3-none-any.whl
Installing collected packages: pip, wheel
Exception:
Traceback (most recent call last):
File "/var/folders/23/49gg72xd4wb1qps4z5j9vbz80000gy/T/tmpz5ckOD/pip.zip/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/var/folders/23/49gg72xd4wb1qps4z5j9vbz80000gy/T/tmpz5ckOD/pip.zip/pip/commands/install.py", line 342, in run
prefix=options.prefix_path,
File "/var/folders/23/49gg72xd4wb1qps4z5j9vbz80000gy/T/tmpz5ckOD/pip.zip/pip/req/req_set.py", line 784, in install
**kwargs
File "/var/folders/23/49gg72xd4wb1qps4z5j9vbz80000gy/T/tmpz5ckOD/pip.zip/pip/req/req_install.py", line 851, in install
self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
File "/var/folders/23/49gg72xd4wb1qps4z5j9vbz80000gy/T/tmpz5ckOD/pip.zip/pip/req/req_install.py", line 1064, in move_wheel_files
isolated=self.isolated,
File "/var/folders/23/49gg72xd4wb1qps4z5j9vbz80000gy/T/tmpz5ckOD/pip.zip/pip/wheel.py", line 247, in move_wheel_files
prefix=prefix,
File "/var/folders/23/49gg72xd4wb1qps4z5j9vbz80000gy/T/tmpz5ckOD/pip.zip/pip/locations.py", line 140, in distutils_scheme
d = Distribution(dist_args)
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 321, in __init__
_Distribution.__init__(self, attrs)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 287, in __init__
self.finalize_options()
File "/Library/Python/2.7/site-packages/setuptools/dist.py", line 389, in finalize_options
ep.require(installer=self.fetch_build_egg)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 2324, in require
items = working_set.resolve(reqs, env, installer, extras=self.extras)
File "/Library/Python/2.7/site-packages/pkg_resources/__init__.py", line 859, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
VersionConflict: (six 1.4.1 (/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python), Requirement.parse('six>=1.6.0'))

Python 2.7.9+ and 3.4+
Good news! Python 3.4 (released March 2014) and Python 2.7.9 (released December 2014) ship with Pip. This is the best feature of any Python release. It makes the community's wealth of libraries accessible to everyone. Newbies are no longer excluded from using community libraries by the prohibitive difficulty of setup. In shipping with a package manager, Python joins Ruby, Node.js, Haskell, Perl, Go--almost every other contemporary language with a majority open-source community. Thank you Python.
Of course, that doesn't mean Python packaging is problem solved. The experience remains frustrating. I discuss this in Stack Overflow question Does Python have a package/module management system?.
And, alas for everyone using Python 2.7.8 or earlier (a sizable portion of the community). There's no plan to ship Pip to you. Manual instructions follow.
Python 2 ≤ 2.7.8 and Python 3 ≤ 3.3
Flying in the face of its 'batteries included' motto, Python ships without a package manager. To make matters worse, Pip was--until recently--ironically difficult to install.
Official instructions
Per https://pip.pypa.io/en/stable/installing/#do-i-need-to-install-pip:
Download get-pip.py, being careful to save it as a .py file rather than .txt. Then, run it from the command prompt:
python get-pip.py
You possibly need an administrator command prompt to do this. Follow Start a Command Prompt as an Administrator (Microsoft TechNet).
Alternative instructions
The official documentation tells users to install Pip and each of its dependencies from source. That's tedious for the experienced, and prohibitively difficult for newbies.
For our sake, Christoph Gohlke prepares Windows installers (.msi) for popular Python packages. He builds installers for all Python versions, both 32 and 64 bit. You need to
Install setuptools
Install pip
For me, this installed Pip at C:\Python27\Scripts\pip.exe. Find pip.exe on your computer, then add its folder (for example, C:\Python27\Scripts) to your path (Start / Edit environment variables). Now you should be able to run pip from the command line. Try installing a package:
pip install httpie
There you go (hopefully)! Solutions for common problems are given below:
Proxy problems
If you work in an office, you might be behind a HTTP proxy. If so, set the environment variables http_proxy and https_proxy. Most Python applications (and other free software) respect these. Example syntax:
http://proxy_url:port
http://username:password#proxy_url:port
If you're really unlucky, your proxy might be a Microsoft NTLM proxy. Free software can't cope. The only solution is to install a free software friendly proxy that forwards to the nasty proxy. http://cntlm.sourceforge.net/
Unable to find vcvarsall.bat
Python modules can be part written in C or C++. Pip tries to compile from source. If you don't have a C/C++ compiler installed and configured, you'll see this cryptic error message.
Error: Unable to find vcvarsall.bat
You can fix that by installing a C++ compiler such as MinGW or Visual C++. Microsoft actually ship one specifically for use with Python. Or try Microsoft Visual C++ Compiler for Python 2.7.
Often though it's easier to check Christoph's site for your package.

How to use esky on windows with python 3.4?

I'm trying to package an auto updating python 3 application using esky, but cannot get it to work on windows.
I'm trying to get the simplest example from the tutorial to work.
https://github.com/cloudmatrix/esky/tree/master/tutorial/stage1
My environment:
Z:\share_space\esky-master\tutorial\stage1>python --version
Python 3.4.3
Z:\share_space\esky-master\tutorial\stage1>pip freeze
...
cx-Freeze==4.3.4
esky==0.9.8
py2exe==0.9.2.2
...
When run using py2exe as the freezer, it fails to find the py2exe module for some reason (though freezing other apps with "python setup.py py2exe" works just fine).
Z:\share_space\esky-master\tutorial\stage1>python setup.py bdist_esky
running bdist_esky
Traceback (most recent call last):
File "setup.py", line 17, in <module>
"freezer_module":"py2exe",
File "C:\Python34\lib\distutils\core.py", line 148, in setup
dist.run_commands()
File "C:\Python34\lib\distutils\dist.py", line 955, in run_commands
self.run_command(cmd)
File "C:\Python34\lib\distutils\dist.py", line 973, in run_command
cmd_obj.ensure_finalized()
File "C:\Python34\lib\distutils\cmd.py", line 107, in ensure_finalized
self.finalize_options()
File "C:\Python34\lib\site-packages\esky\bdist_esky\__init__.py", line 291, in
finalize_options
raise RuntimeError(err)
RuntimeError: freezer module not found: 'py2exe'
With cx-Freeze building the package works well but running the executable fails.
Z:\share_space\esky-master\tutorial\stage1>dist\example-app-0.1.win32\example.ex
e
ValueError: bad marshal data (unknown type code)
Fatal Python error: unable to locate initialization module
Current thread 0x00001254 (most recent call first):

In order got get a working windows build you need the following:
The latest esky version from github (not pypi).
To circumvent an esky bug ensure the character case of dependencies listed with pip freeze are correct and reinstall if not.
I can confirm using cx-Freeze works (py2exe not tested yet).
See this github issue as to how the problem was resolved.

Error in installing setuptools (unorderable types: str() < NoneType())

Python 3.4.2, 32 bit - Win 8.1, 64 bit
First I was trying to upgrade setuptools, but it was not successful. So I decided to uninstall the previous version. Now I can't install setuptools. I have tried the following:
pip install setuptools:
Exception:
Traceback (most recent call last):
File "C:\Python34\lib\site-packages\pip\basecommand.py", line 232, in main
status = self.run(options, args)
File "C:\Python34\lib\site-packages\pip\commands\install.py", line 339, in run
requirement_set.prepare_files(finder)
File "C:\Python34\lib\site-packages\pip\req\req_set.py", line 229, in prepare_
files
req_to_install.check_if_exists()
File "C:\Python34\lib\site-packages\pip\req\req_install.py", line 928, in chec
k_if_exists
self.satisfied_by = pkg_resources.get_distribution(self.req)
File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 461, in get_distribution
dist = get_provider(dist)
File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 341, in get_provider
return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 870, in require
needed = self.resolve(parse_requirements(requirements))
File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 740, in resolve
env = Environment(self.entries)
File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 927, in __init__
self.scan(search_path)
File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 957, in scan
self.add(dist)
File "C:\Python34\lib\site-packages\pip\_vendor\pkg_resources\__init__.py", li
ne 977, in add
dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
TypeError: unorderable types: str() < NoneType()
Running (Invoke-WebRequest https://bootstrap.pypa.io/ez_setup.py).Content | python - in a powershell with admin privileges:
PS C:\Windows\system32> > (Invoke-WebRequest https://bootstrap.pypa.io/ez_setup.py).Content | python -
Invoke-WebRequest : The response content cannot be parsed because the Internet Explorer engine is not available, or
Internet Explorer's first-launch configuration is not complete. Specify the UseBasicParsing parameter and try again.
At line:1 char:4
+ > (Invoke-WebRequest https://bootstrap.pypa.io/ez_setup.py).Content | python -
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotImplemented: (:) [Invoke-WebRequest], NotSupportedException
+ FullyQualifiedErrorId : WebCmdletIEDomNotSupportedException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand
(I'm not willing to install Internet Explorer right now, but if you think I have to, then I will.)
Downloaded the ez_setup.py and ran it:
Installing Setuptools
running install
Traceback (most recent call last):
File "setup.py", line 180, in <module>
dist = setuptools.setup(**setup_params)
File "C:\Python34\lib\distutils\core.py", line 148, in setup
dist.run_commands()
File "C:\Python34\lib\distutils\dist.py", line 955, in run_commands
self.run_command(cmd)
File "C:\Python34\lib\distutils\dist.py", line 974, in run_command
cmd_obj.run()
File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\c
ommand\install.py", line 67, in run
self.do_egg_install()
File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\c
ommand\install.py", line 103, in do_egg_install
cmd.ensure_finalized() # finalize before bdist_egg munges install cmd
File "C:\Python34\lib\distutils\cmd.py", line 107, in ensure_finalized
self.finalize_options()
File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\c
ommand\easy_install.py", line 319, in finalize_options
self.index_url, search_path=self.shadow_path, hosts=hosts,
File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\setuptools\p
ackage_index.py", line 269, in __init__
Environment.__init__(self,*args,**kw)
File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\pkg_resource
s\__init__.py", line 975, in __init__
self.scan(search_path)
File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\pkg_resource
s\__init__.py", line 1005, in scan
self.add(dist)
File "C:\Users\a\AppData\Local\Temp\tmpo7o_bqrd\setuptools-11.3.1\pkg_resource
s\__init__.py", line 1025, in add
dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
TypeError: unorderable types: str() < NoneType()
Something went wrong during the installation.
See the error message above.
Repairing python installation by running python-3.4.2.msi and choosing the repair option. But still no setuptools:
>pip install scipy -U
Collecting scipy from https://pypi.python.org/packages/source/s/scipy/
.0.tar.gz#md5=639112f077f0aeb6d80718dc5019dc7a
Using cached scipy-0.15.0.tar.gz
setuptools must be installed to install from a source distribution
I think uninstalling and reinstalling python would fix the problem, but before trying that I thought maybe you can help me to find the cause of the problem and the right way to fix this. Thanks.

I was able to solve my problem (on Win 8.1 64bit, Python 3.4.2) with the change suggested here:
https://bitbucket.org/pypa/setuptools/pull-request/122/ensure-py_version-and-platform-are-str-in/diff#chg-pkg_resources/init.py

Instead of downloading ez_setup.py, use get-pip.py instead. From the docs, if setuptools is not installed, it will install it first.
Since you're still getting an error, try installing pip and setuptools from Christoph Gohlke's Python Extension Packages for Windows repository. Make sure you download the 32-bit installers for Python 3.4. Once downloaded, run the .exe files and hopefully everything will be back to normal. There are tons of scientific computing packages there, so if you want numpy linked against Intel's MKL, and scipy, which uses the enhanced version of numpy, go right ahead!

Well it seemed to me that my python installation was completely messed up. It could have been related to a temporary installation of python 2 on my system a few weeks ago. Anyway, I thought it would be easier for me to just uninstall and reinstall the whole thing. So I uninstalled python and then reinstalled, but even that was not enough. Finally, I manually deleted C:\Python34 and reinstalled python and now it works fine.