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Open file in a relative location in Python
...y prior windows directory say 'main' , and wherever code is installed when it runs it needs to access to directory 'main/2091/data.txt' .
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Class with Object as a parameter
... '__dict__', '__doc__', '__format__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__']
Also, properties and super do not work with classic classes.
In Python2 ...
What does the “at” (@) symbol do in Python?
...ing at some Python code which used the @ symbol, but I have no idea what it does. I also do not know what to search for as searching Python docs or Google does not return relevant results when the @ symbol is included.
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Get the name of the currently executing method
...follow
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edited May 19 '17 at 3:47
mplewis
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Why do we use __init__ in Python classes?
I am having trouble understanding the Initialization of classes.
8 Answers
8
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How do I override __getattr__ in Python without breaking the default behavior?
...ill be called first (only works for new style classes i.e. those that inherit from object). In this case, you can preserve default behaviour like so:
class Foo(object):
def __getattribute__(self, name):
if some_predicate(name):
# ...
else:
# Default behav...
Multiple levels of 'collection.defaultdict' in Python
Thanks to some great folks on SO, I discovered the possibilities offered by collections.defaultdict , notably in readability and speed. I have put them to use with success.
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Can't pickle when using multiprocessing Pool.map()
...function to divide out work simultaneously. When I use the following code, it works fine:
12 Answers
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What are “named tuples” in Python?
...although there is a recipe for implementation in Python 2.4.
For example, it is common to represent a point as a tuple (x, y). This leads to code like the following:
pt1 = (1.0, 5.0)
pt2 = (2.5, 1.5)
from math import sqrt
line_length = sqrt((pt1[0]-pt2[0])**2 + (pt1[1]-pt2[1])**2)
Using a name...
Does python have an equivalent to Java Class.forName()?
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Reflection in python is a lot easier and far more flexible than it is in Java.
I recommend reading this tutorial
There's no direct function (that I know of) which takes a fully qualified class name and returns the class, however you have all the pieces needed to build that, and you can ...