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Any way to properly pretty-print ordered dictionaries?
I like the pprint module in Python. I use it a lot for testing and debugging. I frequently use the width option to make sure the output fits nicely within my terminal window.
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How does Django's Meta class work?
...For latest version of Django: Django docs: Model Meta options
Metaclass in Python:
The best description is here: What are metaclasses in Python?
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What is a mixin, and why are they useful?
In " Programming Python ", Mark Lutz mentions "mixins". I'm from a C/C++/C# background and I have not heard the term before. What is a mixin?
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Parsing boolean values with argparse
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nargs='?' means zero or one argument. docs.python.org/3/library/argparse.html#nargs
– Maxim
Aug 3 '17 at 12:05
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Filter by property
...filters operate at the database level, generating SQL. To filter based on Python properties, you have to load the object into Python to evaluate the property--and at that point, you've already done all the work to load it.
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Batch Renaming of Files in a Directory
...asy way to rename a group of files already contained in a directory, using Python?
13 Answers
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NPM global install “cannot find module”
...ronment variable depends on your operating system. I'm using a flavour of Linux, so I used export NODE_PATH=... to set it in the local shell such that it is exported to commands run in that shell. To make the change persistent or available to all shells, put it in .profile or similar. The concept...
What are the differences between numpy arrays and matrices? Which one should I use?
... 2]
# [3 4]]
print(a*b)
# [[13 20]
# [ 5 8]]
On the other hand, as of Python 3.5, NumPy supports infix matrix multiplication using the @ operator, so you can achieve the same convenience of matrix multiplication with ndarrays in Python >= 3.5.
import numpy as np
a = np.array([[4, 3], [2, 1...
is node.js' console.log asynchronous?
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Console.log is asynchronous in windows while it is synchronous in linux/mac. To make console.log synchronous in windows write this line at the start of your
code probably in index.js file. Any console.log after this statement will be considered as synchronous by interpreter.
if (process.s...
Writing a compiler in its own language
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Adding a curiosity to the previous answers.
Here's a quote from the Linux From Scratch manual, at the step where one starts building the GCC compiler from its source. (Linux From Scratch is a way to install Linux that is radically different from installing a distribution, in that you have to ...