Develop Reference

Error when packaging eel project to an exe

I am building an python project with Eel, and I'm trying to package my program to an exe with PyInstaller as instructed in the documentation. However, I get the following error when I open the .exe:
Error
Traceback (most recent call last):
File "hello.py", line 1, in <module>
import eel
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "PyInstaller\loader\pyimod02_importers.py", line 499, in exec_module
File "eel\__init__.py", line 8, in <module>
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "PyInstaller\loader\pyimod02_importers.py", line 499, in exec_module
File "bottle.py", line 73, in <module>
AttributeError: 'NoneType' object has no attribute 'write'
I tried to use auto py-to-exe instead of Pyinstaller, but I got the same error. Finally, I tried to package the Eello world example from the Eel documentation to see if it was my program that was the issue, but I still got the same error. I found a similiar problem in a github issue, but I fail to see what I should attach to --add-data.
I am running Python 3.10.8 and Eel 0.14.0. I've now tried python 3.8.9 and python 3.9.13 without luck.
Update
Upon further investigation, I discovered that the error only occours when I attach --noconsole at the end of my cmd python -m eel hello.py web --onefile --noconsole . However, I want my app to work without a visible console.

One of the libraries you are using is attempting to write to sys.stdout and sys.stderr, which are set to None when you run pyinstaller with --windowed option.
You need to explicitly set sys.stderr and sys.stdout in your programs code as early as possible to a writeable object like an open file or an io buffer.
for example:
import sys
outfile = open("logfile.txt", "wt")
sys.stderr = outfile
sys.stdout = outfile

Issue with virtualenv/mkvirtualenv/pip - "zsh: /usr/local/bin/pip: bad interpreter: /usr/local/opt/python#2/bin/python2.7: no such file or directory"

I'm trying to create a new virtualenvironment for some repos but seem to be running into a bunch if issues in my terminal, these are the errors I get:
zsh: /usr/local/bin/pip: bad interpreter: /usr/local/opt/python#2/bin/python2.7: no such file or directory
OR this issue:
ERROR: It thinks sys.prefix is '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7' (should be '/Users/USERNAME_HERE/.virtualenvs/returns-backend')
ERROR: virtualenv is not compatible with this system or executable
I get this error when running: brew link --overwrite python from here
Linking /usr/local/Cellar/python/3.7.7... Error: Cannot link python
Another version is already linked: /usr/local/Cellar/python/3.7.6_1
I also get this issue when running the following command: pip3 install --upgrade pip from this comment
Traceback (most recent call last):
File "/usr/local/bin/pip3", line 11, in <module>
load_entry_point('pip==19.3.1', 'console_scripts', 'pip3')()
File "/usr/local/lib/python3.7/site-packages/pip/_internal/main.py", line 45, in main
command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
File "/usr/local/lib/python3.7/site-packages/pip/_internal/commands/__init__.py", line 96, in create_command
module = importlib.import_module(module_path)
File "/usr/local/Cellar/python/3.7.6_1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/usr/local/lib/python3.7/site-packages/pip/_internal/commands/install.py", line 23, in <module>
from pip._internal.cli.req_command import RequirementCommand
File "/usr/local/lib/python3.7/site-packages/pip/_internal/cli/req_command.py", line 17, in <module>
from pip._internal.index import PackageFinder
ImportError: cannot import name 'PackageFinder' from 'pip._internal.index' (/usr/local/lib/python3.7/site-packages/pip/_internal/index/__init__.py)
I haven't touched the terminal in a long time (2+ years) and don't remember what I used to set these up as my documentation wasn't great last time when starting to code. I think I remember using brew before to set this stuff all up, but now I'm just worried about making any more changes that might break things even further.
Any help with commands that might not be as intrusive/possibly making this problem bigger?

AttributeError: module 'numpy.core' has no attribute 'numerictypes'

Strange behavior in PyCharm (2021.2.1 Professional Edition) with Python 3.9 and numpy 1.21.2.
When I run my program with "Run" then it works as expected. But when I run it with "Debug" then the following error messages appears and the program stops:
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 850, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "C:\Python\JobAnalyzer\venv\lib\site-packages\numpy\__init__.py", line 200, in <module>
core.numerictypes.typeDict,
AttributeError: module 'numpy.core' has no attribute 'numerictypes'
python-BaseException
Any hints what could be the cause?
It crashes immediately at the following line:
import matplotlib.pyplot as plt
And in numpy at this line:
# Numpy 1.20.0, 2020-10-19
__deprecated_attrs__["typeDict"] = (
core.numerictypes.typeDict, <--- CRASH HERE
"`np.typeDict` is a deprecated alias for `np.sctypeDict`."
)

The bug is documented here, it is related to PySide2, which is used by default by PyCharm for PyQt compatibility. The workaround (besides downgrading numpy) is to go to PyCharm's settings / "Build, Execution, Deployment" / "Python debugger", and there uncheck or change the value of the PyQt compatibility drop-down to something else than Auto or PySide2:

Sphinx throws KeyError exception

I have a python flask script inside a docker. This script get some environment variable from the docker-compose in this way:
app = Flask(__name__)
DEFAULT_PSW = os.environ['DEFAULT_PSW']
#app.route("/")
def manager():
...
I wanted to document it using Sphinx. I was able to configure it but when I run "make html" I get this exception:
WARNING: autodoc: failed to import module 'main'; the following exception was raised:
Traceback (most recent call last):
File "/home/lorenzo/.local/lib/python3.7/site-packages/sphinx/ext/autodoc/importer.py", line 32, in import_module
return importlib.import_module(modname)
File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/home/lorenzo/Desktop/Dev/project/script/manager_flask/manager/manager/main.py", line 20, in <module>
DEFAULT_PSW = os.environ['DEFAULT_PSW']
File "/usr/lib/python3.7/os.py", line 679, in __getitem__
raise KeyError(key) from None
KeyError: 'DEFAULT_PSW'
If I've understood well how sphinx works the problem is that sphinx will try to "compile" my script and, of course, during this process it won't find the environment variable. What can I do?
EDIT:
Steps that I did to get this error:
Create folder called docs
Inside the docs folder started sphinx-quickstart leaving everything by default except for Author and Project name.
Edited the conf.py (this file can be found in the repository in the comment)
Generate the rst file with sphinx-apidoc
Create folder modules and added the file scp_handler.rst and main.rst
Updated the index.rst adding the path to the new generated file
Ran "make html".

For documentation purposes set and export the key in the conf.py file:
os.environ("DEFAULT_PSW", "default_psw")

Logging module not working with Python3

I am having issues with the standard logging module. If I open a python2.7 shell and import logging everything works fine:
$ python
>>> import logging
>>>
But if I open a python3.4 shell and import logging I get the following error:
$ python3.4
>>> import logging
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
File "<frozen importlib._bootstrap>", line 2222, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 2164, in _find_spec
File "<frozen importlib._bootstrap>", line 1940, in find_spec
File "<frozen importlib._bootstrap>", line 1916, in _get_spec
File "<frozen importlib._bootstrap>", line 1897, in _legacy_get_spec
File "<frozen importlib._bootstrap>", line 863, in spec_from_loader
File "<frozen importlib._bootstrap>", line 904, in spec_from_file_location
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/logging-0.4.9.6-py3.4.egg/logging/__init__.py", line 618
raise NotImplementedError, 'emit must be implemented '\
^
SyntaxError: invalid syntax
I have no idea what the problem is and can't seem to find anyone else who has had the same issue.

logging module is by default there in Python 3 environment .No need to import it.

You seem to have installed a third party library called logging in your Python 3 environment, which is hiding the standard library version, and one of its files has a typo.

I stupidly created a file called logging.py to try out some log features. Then when trying the code below, it is effectively referring to itself and can't find the debug method.
import logging
logging.debug("Debug message")
Changing my file name to logtest.py fixed the problem.

for me it was the previous install of a logging library under an older Python version.
pip3 uninstall logging
fixed it for me.