Apr 27, 2019 · Starting Python 3.8, and the introduction of assignment expressions (PEP 572) (:= operator), it's now possible to capture the condition value (isBig(y)) as a variable (x) in order to …

The reason it doesn't work, at least on CPython, is that CPython allocates a fixed size array for locals, and the size of said array is determined when the function is defined, not when its run, …

Oct 24, 2011 · For the future time traveler from Google, here is a new way (available from Python 3.8 onward): b = 1 if a := b: # this section is only reached if b is not 0 or false. # Also, a is set …

Jul 11, 2016 · When you assign 42 to the name _my_global, therefore, Python creates a local variable that shadows the global variable of the same name. That local goes out of scope and …

For some reason I can't remember how to do this - I believe there was a way to set a variable in Python, if a condition was true? What I mean is this: value = 'Test' if 1 == 1 Where it would …

Unlike some languages, you can't assign to elements in a Python list that don't yet exist (you'll get a "list assignment index out of range" error). You may want to use string.append("Hello") instead.

Jan 6, 2012 · I also feel a bit unconfortable using that kind of expressions. In Learning Python 4ed it is called a "somewhat unusual behavior". Later Mark Lutz says:...it turns out to be a fairly …

Oct 14, 2010 · Python isn't necessarily easier/faster than C, though it's possible that it's simpler ;) To clarify another statement you made, "you don't have to declare the data type" - it should be …

Python's runtime only deals in references to objects (which all live in the heap): what goes on Python's stack are always references to values that live elsewhere. >>> a = [1, 2] >>> b = a …

May 6, 2015 · For Python 3.8+, PEP 572 introduces Assignment Expressions This allows assigning to variables within an expression using the notation NAME := expr . It can be used …