In sklearn.metrics.f1_score, the f1 score has a parameter called “average”. What does macro, micro, weighted, and samples mean? Please elaborate, because in the documentation, it was not explained properly. Or simply answer the following: Why is “samples” best parameter for multilabel …
Tag: python-3.x
Python PyQt5 QTreeView set row Background Colour
I am trying to set the background colour (color) for a) a whole QTreeView, and b) for specific rows in a QTreeView within Python. I have found setColor and setBackgroundColor methods, but neither seem to work for me with QTreeView nor QStandardItem. Lots of googling shows many conversations about it, but I ha…
How to remove a keybind after it has done its job
I created a keybind, and want to delete it after it is activated. How do I do this? I have tried this in my code: However, this does not work, as Python displays an error message stating that deletecommand() takes 2 positional arguments but 3 were given, when I only gave two arguments. I also tried root.delet…
Keybind that binds to every key in tkinter
I am creating an interactive game with Python, and I am trying to make an introduction with the instruction “Press any key to continue.” I am having some difficulty with binding all the keys to a single action. I have tried binding to ‘<Any>’, but it displays an error message. As…
How to delete a label from tkinter after a countdown
I am trying to create a ten-second countdown that removes itself after it reaches zero. How and where do I put code to remove the label? I have experimented with label.destroy() and label.forget(), but they do not work, creating an error message, most likely because they do not exist. I was hoping for the pro…
“asyncio.run() cannot be called from a running event loop” when using Jupyter Notebook
I would like to use asyncio to get webpage html. I run the following code in jupyter notebook: However, it returns RuntimeError: asyncio.run() cannot be called from a running event loop What is the problem? How to solve it? Answer The asyncio.run() documentation says: This function cannot be called when anoth…
Python 3.6.4 Arcade Module Window Errors? {pyglet.gl.lib.GLException: b’invalid enumerant’}
UPDATE: I checked the graphics cards installed on the computers. The one where it “works” has Nvidia Graphics and the other has Intel HD R graphics under display adapter in Device Manager. I’m assuming the Intel HD R graphics driver is not sufficient (does not contain the OpenGL required?). …
How to mute/unmute sound using pywin32?
My searches lead me to the Pywin32 which should be able to mute/unmute the sound and detect its state (on Windows 10, using Python 3+). I found a way using an AutoHotkey script, but I’m looking for a pythonic way. More specifically, I’m not interested in playing with the Windows GUI. Pywin32 works…
I am not able to resolve ‘lxml.etree.XPathEvalError: Invalid expression’ error on a legal XPATH expression
I am trying to parse an xpath but it is giving Invalid expression error. The code that should work: Expected result is a boolean value but it is showing error: Answer The exception is because name() isn’t a valid node type. Your XPath would only be valid as XPath 2.0 or greater. lxml only supports XPath…
PEP484 typing — how to annotate Callable with NoReturn type?
Is it possible to annotate Callable with the NoReturn type? The way I would expect to do this yields an error: Edit: for anyone who encounters this problem in the future, the issue was a bug in Python 3.7.0 and upgrading to Python 3.7.2 mitigates the issue. Answer For me (with Python 3.7.2) it works without a…