Develop Reference

ValueError: embedded null character for flaskenv on windwos with dotenv

I am trying to use flask dotenv along with python-dotenv but I noticed that there is an inssue on Windwos 10.
Everyting works fine on Mac,Linux but on windows when I run the flask application I get an exception.
It seams that the issue is with the file .flaskenv. If I rename the file from .flaskenv to _flaskenv there is no exception anymore but my env variables are not defined. I have tried to also to load manually this file but without any success. the _flaskenv is not loaded.
# .flaskenv
FLASK_APP=manage.py
FLASK_ENV=development
PS D:\practice\flask-dotenv> flask run
Traceback (most recent call last):
File "C:\Users\popam\AppData\Local\Programs\Python\Python37-32\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "C:\Users\popam\AppData\Local\Programs\Python\Python37-32\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "D:\practice\flask-dotenv\venv\Scripts\flask.exe\__main__.py", line 9, in <module>
File "d:\practice\flask-dotenv\venv\lib\site-packages\flask\cli.py", line 894, in main
cli.main(args=args, prog_name=name)
File "d:\practice\flask-dotenv\venv\lib\site-packages\flask\cli.py", line 548, in main
load_dotenv()
File "d:\practice\flask-dotenv\venv\lib\site-packages\flask\cli.py", line 608, in load_dotenv
dotenv.load_dotenv(path)
File "d:\practice\flask-dotenv\venv\lib\site-packages\dotenv\main.py", line 309, in load_dotenv
return DotEnv(f, verbose=verbose).set_as_environment_variables(override=override)
File "d:\practice\flask-dotenv\venv\lib\site-packages\dotenv\main.py", line 138, in set_as_environment_variables
os.environ[k] = v
File "C:\Users\popam\AppData\Local\Programs\Python\Python37-32\lib\os.py", line 684, in __setitem__
self.putenv(key, value)
ValueError: embedded null character```

Can't create and active Virtualenv in windows 10 , python 37

I am new in Python and to be coder :) I am trying to create and active virtualenv, searching for days to fix this problem but I couldn't, can you help me pls..
Thank you.
Let me show you my administrator:
Using base prefix 'c:\\users\\büşra\\appdata\\local\\programs\\python\\python37'
New python executable in C:\Users\Büşra\Desktop\Django-Virtualenv\myenv\Scripts\python.exe
Complete output from command C:\Users\Büşra\Deskt...v\Scripts\python.exe -m pip config list:
Could not import runpy module
ModuleNotFoundError: No module named 'runpy'
----------------------------------------
Traceback (most recent call last):
File "c:\users\büşra\appdata\local\programs\python\python37\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "c:\users\büşra\appdata\local\programs\python\python37\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Users\Büşra\AppData\Local\Programs\Python\Python37\Scripts\virtualenv.exe\__main__.py", line 9, in <module>
File "c:\users\büşra\appdata\local\programs\python\python37\lib\site-packages\virtualenv.py", line 793, in main
symlink=options.symlink,
File "c:\users\büşra\appdata\local\programs\python\python37\lib\site-packages\virtualenv.py", line 1087, in create_environment
install_wheel(to_install, py_executable, search_dirs, download=download)
File "c:\users\büşra\appdata\local\programs\python\python37\lib\site-packages\virtualenv.py", line 935, in install_wheel
_install_wheel_with_search_dir(download, project_names, py_executable, search_dirs)
File "c:\users\büşra\appdata\local\programs\python\python37\lib\site-packages\virtualenv.py", line 964, in _install_wheel_with_search_dir
config = _pip_config(py_executable, python_path)
File "c:\users\büşra\appdata\local\programs\python\python37\lib\site-packages\virtualenv.py", line 1038, in _pip_config
remove_from_env=["PIP_VERBOSE", "PIP_QUIET"],
File "c:\users\büşra\appdata\local\programs\python\python37\lib\site-packages\virtualenv.py", line 886, in call_subprocess
raise OSError("Command {} failed with error code {}".format(cmd_desc, proc.returncode))
OSError: Command C:\Users\Büşra\Deskt...v\Scripts\python.exe -m pip config list failed with error code 1```

On a windows machine you would activate the virtual environment as follows:
cd into the project directory, if your virtual environment is named venv then this
venv\scripts\activate will activate the virtual environment

Error with "mlflow ui" when trying to run it on MS Windows

When I run mlflow ui the following error occurred:
Traceback (most recent call last):
File "c:\anaconda3\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "c:\anaconda3\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Anaconda3\Scripts\gunicorn.exe\__main__.py", line 5, in <module>
File "c:\anaconda3\lib\site-packages\gunicorn\app\wsgiapp.py", line 9, in <module>
from gunicorn.app.base import Application
File "c:\anaconda3\lib\site-packages\gunicorn\app\base.py", line 12, in <module>
from gunicorn import util
File "c:\anaconda3\lib\site-packages\gunicorn\util.py", line 9, in <module>
import fcntl
ModuleNotFoundError: No module named 'fcntl'
Traceback (most recent call last):
File "c:\anaconda3\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "c:\anaconda3\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Anaconda3\Scripts\mlflow.exe\__main__.py", line 9, in <module>
File "c:\anaconda3\lib\site-packages\click\core.py", line 722, in __call__
return self.main(*args, **kwargs)
File "c:\anaconda3\lib\site-packages\click\core.py", line 697, in main
rv = self.invoke(ctx)
File "c:\anaconda3\lib\site-packages\click\core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "c:\anaconda3\lib\site-packages\click\core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "c:\anaconda3\lib\site-packages\click\core.py", line 535, in invoke
return callback(*args, **kwargs)
File "c:\anaconda3\lib\site-packages\mlflow\cli.py", line 131, in ui
mlflow.server._run_server(file_store, file_store, host, port, 1)
File "c:\anaconda3\lib\site-packages\mlflow\server\__init__.py", line 48, in _run_server
env=env_map, stream_output=True)
File "c:\anaconda3\lib\site-packages\mlflow\utils\process.py", line 38, in exec_cmd
raise ShellCommandException("Non-zero exitcode: %s" % (exit_code))
mlflow.utils.process.ShellCommandException: Non-zero exitcode: 1
I used anaconda + python 3.6.5 and I installed git and set path with C:\Program Files\Git\bin\git.exe and C:\Program Files\Git\cmd.
I installed mlflow whit pip install mlflow and its version is 0.2.1.
I set a variable with name GIT_PYTHON_GIT_EXECUTABLE and value C:\Program Files\Git\bin\git.exe in Environment Variables.
How can I solve this?

firstly Uninstall 'mlflow' and 'waitress', then again install 'mlflow' .Now try it works

mlflow documentation already says that
Note 2: We do not currently support running MLflow on Windows.
Despite this, we would appreciate any contributions to make MLflow
work better on Windows.
You're hitting fcntl problem: it's not available on MS Windows platform because it's a "wrapper" around the fcntl function that's available on POSIX-compatible systems. (See https://stackoverflow.com/a/1422436/236007 for more details.)
Solving this requires modifying the source code of mlflow accordingly.

Running 'lektor server' under Pycharm Debugger?

I try to get started with Lektor CMS internals and would like to run it under the great Pycharm debugger. In particular I want to run
$ lektor server
I followed the steps
$ git clone https://github.com/lektor/lektor
$ cd lektor
$ virtualenv venv
$ . venv/bin/activate
$ pip install --editable .
$ make build-js
$ make install-git-hooks
$ export LEKTOR_DEV=1
$ lektor quickstart --path example-project
$ lektor --project example-project server
in the Github readme about development and they work just fine in the terminal. Then I created the following Pycharm debug-config:
However this throws the following RuntimeException:
Traceback (most recent call last):
File "/home/barrios/IDEs/pycharm-community-2018.1.1/helpers/pydev/pydevd.py", line 1664, in <module>
main()
File "/home/barrios/IDEs/pycharm-community-2018.1.1/helpers/pydev/pydevd.py", line 1658, in main
globals = debugger.run(setup['file'], None, None, is_module)
File "/home/barrios/IDEs/pycharm-community-2018.1.1/helpers/pydev/pydevd.py", line 1085, in run
runpy._run_module_as_main(module_name, alter_argv=False)
File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
"__main__", fname, loader, pkg_name)
File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
exec code in run_globals
File "/home/barrios/code/lektor/lektor/__main__.py", line 3, in <module>
main(as_module=True)
File "/home/barrios/code/lektor/lektor/cli.py", line 627, in main
cli.main(args=args, prog_name=name)
File "/home/barrios/code/lektor/venv/local/lib/python2.7/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/home/barrios/code/lektor/venv/local/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/barrios/code/lektor/venv/local/lib/python2.7/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/barrios/code/lektor/venv/local/lib/python2.7/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/home/barrios/code/lektor/venv/local/lib/python2.7/site-packages/click/decorators.py", line 64, in new_func
return ctx.invoke(f, obj, *args[1:], **kwargs)
File "/home/barrios/code/lektor/venv/local/lib/python2.7/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/home/barrios/code/lektor/lektor/cli.py", line 387, in server_cmd
browse=browse)
File "/home/barrios/code/lektor/lektor/devserver.py", line 124, in run_server
dt.start()
File "/home/barrios/code/lektor/lektor/devserver.py", line 75, in start
portable_popen(['npm', 'install', '.'], cwd=admin).wait()
File "/home/barrios/code/lektor/lektor/utils.py", line 486, in portable_popen
raise RuntimeError('Could not locate executable "%s"' % cmd[0])
RuntimeError: Could not locate executable "npm"
Process finished with exit code 1
Obviously it can't find npm to init the Web-UI. When replacing the parameter 'server' with 'build', debugging works fine. Is it impossible to run this Javascript code via subprocess from inside Pycharm debugger?
Or what else am I doing wrong? Any ideas how to fix this? TNX in advance.
EDIT: I read in some other SO-thread Pycharm is probably running a subprocess under the system Python interpreter outside the virtualenv?!? This would explain why it messes up dependencies, but the npm command IS available anywhere on the system... So why is it not found???

AWS ec2 winreg not found

I'm trying to run a python app from amazon EC2 large instance. However, Its complaining in scipy because it can't find a thing called _winreg.
I don't know how to reconfigure this so its no longer an issue.
$ python2 app.py
* Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
* Restarting with stat
Traceback (most recent call last):
File "app.py", line 111, in <module> app = create_app().run(debug=True)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 772, in run run_simple(host, port, self, **options)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/serving.py", line 622, in run_simple reloader_type)
File "/usr/local/lib/python2.7/dist-packages/werkzeug/_reloader.py", line 265, in run_with_reloader reloader.run()
File "/usr/local/lib/python2.7/dist-packages/werkzeug/_reloader.py", line 155, in run for filename in chain(_iter_module_files(), self.extra_files):
File "/usr/local/lib/python2.7/dist-packages/werkzeug/_reloader.py", line 70, in _iter_module_files for package_path in getattr(module, '__path__', ()):
File "/usr/lib/python2.7/dist-packages/scipy/lib/six.py", line 116, in __getattr__ _module = self._resolve()
File "/usr/lib/python2.7/dist-packages/scipy/lib/six.py", line 105, in _resolve return _import_module(self.mod)
File "/usr/lib/python2.7/dist-packages/scipy/lib/six.py", line 76, in _import_module __import__(name) ImportError: No module named _winreg """

Check out the comments on the answer of this post.
I'm guessing by using the watchdog module it doesn't import "stat" which seems to look for this _winreg package.
In other words, installing the module "watchdog" seems to do the trick.