I have been programming in Python in one capacity or another since around 2000. That’s almost 15 years. Over those years, I’ve come to know the language fairly well. I originally came to Python from C and Perl, and it was quite refreshing to come to a language that is simple to use, has a consistent syntax and library, and is quite powerful.
A few weeks ago, a colleague came to me with an interesting bug: When running a child process with Python’s subprocess module, no exception is thrown when the child process fails. In essence, what happened was the following (typed at the interactive Python prompt):
A colleague asked me to look into a problem with him, mentioning that “Tlib hangs when we run it”. Tlib is a fairly large project that is written in Python. His initial analysis showed that it hangs at a very early phase, during with it tries to fetch the latest version to run from a git server.
Recently, a colleague and I refactored a piece of existing code that had new behavior added to it. During the process, we managed to improve the readability of the code using several techniques that I’ll describe below.
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