Eric Matthes - Mostly Python

terminal session showing a run of go_fish.py. The player makes one invalid guess, then a correct guess. No cards are removed from their hand, but one card is removed from the computer's hand.

debugging

Debugging in Python, part 11: Another logical error

MP 154: They just keep coming. :) Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be available to everyone. Thank you to everyone who supports

terminal showing output of grep command, run against an entire directory

refactoring

grep is your friend

MP 153: If it's not already, it should be. :) Note: I will get back to the debugging series as soon as I can. Work has been busy lately, and it's much easier to write about things that are coming up in my regular work at the

documentation snippet about `timedelta` objects

datetime

Time deltas are not intuitive

MP 152: But the timedelta implementation in Python is correct. In many projects, timestamps are just a bit of metadata you might look at once in a while when troubleshooting. But sometimes, timestamps are a critical piece of information. If you handle them right, your project works. If you don&

debugger session showing that two hands have exactly the same cards

debugging

Debugging in Python, part 10: A logical error

MP 151: How do you debug a program that doesn't crash? Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be available to

terminal output showing two hands of seven cards each

Debugging in Python, part 9: Hands and Decks

MP 150: Modeling a hand of playing cards, and a deck as well. Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be available to

Debugging in Python, part 8: Modeling playing cards

MP 149: In pursuit of logical errors. Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be available to everyone. Thank you to everyone who

terminal window showing a bunch of HTML and JavaScript instead of opening a plot in a browser windo

debugging

Minimal reproducible examples

MP 148: How small can a minimum reproducible example be? Note: My workload has increased over the last month, and I haven't had time to finish the current debugging series. It should be wrapped up in a few more posts, and those posts should come out over the

bar chart showing lifespans of major Python releases, from Python's status page

python version

Updating Python

MP 147: How do you clean up when you have too many Pythons lying around? About a year and a half ago, I wrote a post about how to update the version of Python you're using locally. I was hoping that would be a guide I could refer

debugging

Debugging in Python, part 7: Bugs in third-party libraries

MP 146: What happens when the bug actually is in one of your project's dependencies? Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they

Visualization where each player's lifespan is represented by a horizontal bar

debugging

Debugging in Python, part 6: Tracebacks with dependencies

MP 145: Why third-party code appears in tracebacks, and what you can learn from it. Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be

debugging

Debugging in Python, part 5: Working through multiple bugs

MP 144: What happens when you fix a bug, only to find another bug right away? Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will

Spotify card for episode 6 of the core.py podcast, which focuses on how Python's exceptions are implemented

debugging

Debugging in Python, part 4: Bugs in multi-file projects

MP 143: How do you find a bug in a larger project? Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be available to everyone.

"py-bugger: An intentional way to practice debugging." (followed by a one-paragraph description of the project)

PyCon

Validating a new project

MP 142: Conference "open spaces" are a great place to get valuable feedback about new projects. Note: The debugging series will continue shortly. I spent a full week at PyCon, and my son graduated from middle school the day after I got back. Life has been busy. :) I

me standing on the side of a cliff attached to a rope, with forested mountains in the background

reflections

Know two ways

MP 141: Advice from a climbing guide that's quite relevant to programming. Note: The debugging series will continue shortly. I'm busy getting ready for PyCon, and haven't had time to finish the next post in that series yet. Since moving to North Carolina last

debugging

Debugging in Python, part 3: Fixing a "simple" bug

MP 140: How can we take a systematic approach to a "simple" bug? Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be

Blank GitHub issue template for reporting a new bug.

debugging

Debugging in Python, part 2: Developing a debugging mindset

MP 139: A systematic, inquisitive approach makes debugging simple issues easier, and complex bugs possible. Note: This post is part of an ongoing series about debugging in Python. The posts in this series will only be available to paid subscribers for the first 6 weeks. After that they will be