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Abort makefile if variable not set
... an auxiliary function for that:
# Check that given variables are set and all have non-empty values,
# die with an error otherwise.
#
# Params:
# 1. Variable name(s) to test.
# 2. (optional) Error message to print.
check_defined = \
$(strip $(foreach 1,$1, \
$(call __check_defined,$...
Import module from subfolder
...For example like this PYTHONPATH=.:.. (for *nix family).
Also you can manually add your current directory (src in your case) to pythonpath:
import os
import sys
sys.path.insert(0, os.getcwd())
share
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How to call a Parent Class's method from Child Class in Python?
...P was asking how to do it without explicitly naming the superclass at the call site (Bar, in this case).
– Adam Rosenfield
Apr 30 '09 at 2:13
8
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How does type Dynamic work and how to use it?
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Scalas type Dynamic allows you to call methods on objects that don't exist or in other words it is a replica of "method missing" in dynamic languages.
It is correct, scala.Dynamic doesn't have any members, it is just a marker interface - the co...
What are “named tuples” in Python?
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Named tuples are basically easy-to-create, lightweight object types. Named tuple instances can be referenced using object-like variable dereferencing or the standard tuple syntax. They can be used similarly to struct or other common record types...
How do I get list of methods in a Python class?
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Will this produce a list of all methods in the class (including ones that are inherited from other classes), or will it only list the methods that are explicitly defined in that class?
– Anderson Green
Mar 10 '13 a...
What is the best way to implement nested dictionaries?
I have a data structure which essentially amounts to a nested dictionary. Let's say it looks like this:
21 Answers
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Which is better in python, del or delattr?
... (foo)
6 LOAD_CONST 1 ('bar')
9 CALL_FUNCTION 2
12 POP_TOP
This translates into the first running slightly faster (but it's not a huge difference – .15 μs on my machine).
Like the others have said, you should really...
sys.argv[1] meaning in script
...more tutorial level.
For every invocation of Python, sys.argv is automatically a list of strings representing the arguments (as separated by spaces) on the command-line. The name comes from the C programming convention in which argv and argc represent the command line arguments.
You'll want to lea...
What would a “frozen dict” be?
...).
The most common reason to want such a type is when memoizing function calls for functions with unknown arguments. The most common solution to store a hashable equivalent of a dict (where the values are hashable) is something like tuple(sorted(kwargs.iteritems())).
This depends on the sorting n...