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Difference between len() and .__len__()?
...eaning would be clear to beginners but a.len() would not be as clear. When Python started __len__ didn't even exist and len was a special thing that worked with a few types of objects. Whether or not the situation this leaves us makes total sense, it's here to stay.
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How do I handle the window close event in Tkinter?
How do I handle the window close event (user clicking the 'X' button) in a Python Tkinter program?
6 Answers
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How to escape special characters in building a JSON string?
...d any JSON parser will choke on it. (Certainly JavaScript's JSON.parse and Python's json.loads do.)
– Mark Amery
Jan 31 '15 at 16:26
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How can I dynamically create derived classes from a base class
...ames in the naming scope --
now, that is not considered a good practice in Python - you either have
variable names, known at coding time, or data - and names learned in runtime
are more "data" than "variables" -
So, you could just add your classes to a dictionary and use them from there:
name = "...
How to add /usr/local/bin in $PATH on Mac
... the question is tagged osx, this approach has the advantage of working on Linux and other UNIX-like systems as well.
– Mark Reed
Jul 7 '14 at 14:32
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What does “opt” mean (as in the “opt” directory)? Is it an abbreviation? [closed]
...en it was a standard part of System V UNIX. These days, it's also seen in Linux, Solaris (which is SysV), OSX Cygwin, etc. Other BSD unixes (FreeBSD, NetBSD, etc) tend to follow other rules, so you don't usually see BSD systems with an /opt unless they're administered by someone who is more comfor...
csv.Error: iterator should return strings, not bytes
... best practices around it. I do that fairly consistently. If you're new to Python, and you get stuck in an interactive session with a file you can't do anything with, you would have appreciated my advice...
– Aaron Hall♦
Mar 9 '19 at 13:04
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How do I resize an image using PIL and maintain its aspect ratio?
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The Python 3 documentation for PIL says that thumbnail only works if the resulting image is smaller than the original one. Because of that I would guess that using resize is the better way.
– So S
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Docker - a way to give access to a host USB or serial device?
...ke /dev/ttyACM0 or /dev/ttyUSB0.
The docker run commands will work with a Linux host as well.
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is there an virtual environment for node.js?
...ed the wiki modules page, but I can't find anything similar to virtualenv (python) or rvm.
7 Answers
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