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From both Python2 Tutorial and Python3 Tutorial, there is a line in the midpoint of section 7.2.1 s… Read more In Python, What Is The Difference Between F.readlines() And List(f)

Coming from much less dynamic C++, I have some trouble understanding the behaviour of this Python (… Read more Writing (and Not) To Global Variable In Python

Given Zero Piraeus' answer to another question, we have that x = tuple(set([1, 'a', … Read more Why Does Tuple(set([1,"a","b","c","z","f"])) == Tuple(set(["a","b","c","z","f",1])) 85% Of The Time With Hash Randomization Enabled?

Here is my code: from memory_profiler import profile @profile def mess_with_memory(): huge_lis… Read more What Does "del" Do Exactly?

If we make a pathological potato like this: >>> class Potato: ... def __eq__(self, oth… Read more Making An Object X Such That "x In [x]" Returns False

From Python in a Nutshell Custom Importers An advanced, rarely needed functionality that Python of… Read more What Is The Default Binding To The `__import__` Attribute Of The Module `builtin`?

Is the itertools C module included somehow in the main Python binary in 3.x? Assuming that the C m… Read more In Python 3.x, Why Is There Not An Itertools Shared-object On Disk?

A generator is a special kind of iterator, and it has some methods that an normal iterator doesn… Read more Why Does Genexp(generator Expression) Is Called Genexp? Not Iterexp?

I've heard that __slots__ makes objects faster by avoiding a dictionary lookup. My confusion co… Read more How Does __slots__ Avoid A Dictionary Lookup?

So lists are unhashable: >>> { [1,2]:3 } TypeError: unhashable type: 'list' The f… Read more What Makes Lists Unhashable?

I am trying to give my subclasses default variables and stop duplicating code as the file is gettin… Read more How To Call Parent Class Init With Default Values From Child Class?

I'm learning Learn Python the hard way. w = 'This is the left side of...' e = 'a st… Read more Why Does + (plus) Can Concatenate Two Strings In Python?

x=300 y=300 print(id(x),id(y)) a=[300,300] print(id(a[0]),id(a[1])) On executing above code I get … Read more Python 3 Integer Addresses

There is puzzling (at least for me) behavior of Python's set in combination with NaNs (here liv… Read more Causes For Inconsistent Behavior When Adding Nans To A Set

I noticed that without source code encoding declaration, the Python 2 interpreter assumes the sourc… Read more Python 2 Assumes Different Source Code Encodings

Recently i came across a question & confused with a possible solution, code part is // code p… Read more Handling Map Function In Python2 & Python3

When I try to use print without parentheses on a simple name in Python 3.4 I get: >>> prin… Read more Printing Without Parentheses Varying Error Message Using Python 3

I was playing around with timeit and noticed that doing a simple list comprehension over a small st… Read more Why Is It Slower To Iterate Over A Small String Than A Small List?

Here is my code: from memory_profiler import profile @profile def mess_with_memory(): huge_lis… Read more What Does "del" Do Exactly?