Apr 27, 2019 · 189 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 …

Naturally, this creates a variable inside the function's scope called Var1 (truthfully, a -= or += will only update (reassign) an existing variable, but for reasons unknown (likely consistency in this …

See Python reference. You should declare variable without global and then inside the function when you want to access global variable you declare it global yourvar.

8 I'd like to flexibly assign a value to a variable in Python, no matter where in my code that variable is. For instance, given a variable x in an if statement:

Everything in Python is passed and assigned by value, in the same way that everything is passed and assigned by value in Java. Every value in Python is a reference (pointer) to an object.

Jan 6, 2012 · Is it considered bad style to assign values to variables like this? x = "foobar" or None y = some_variable or None In the above example, x gets the value 'foobar'.

Oct 24, 2011 · One line if-condition-assignment Asked 14 years, 1 month ago Modified 2 months ago Viewed 536k times

The reason for this is that, inside t, Python thinks that x is a local variable. Furthermore, unless you explicitly tell it that x is global, it will try to use a local variable named x in x += 1.

Nov 17, 2012 · This isn't entirely clear. Where did new_variable come from? If you're trying to do update assignment to a value in a dictionary just do my_dict['foo'] += 1 or whatever.

PEP 572 seeks to add assignment expressions (or "inline assignments") to the language, but it has seen a prolonged discussion over multiple huge threads on the python-dev mailing …