How to do variable assignment inside a while(expression) loop in Python?

Question

I have the variable assignment in order to return the assigned value and compare that to an empty string, directly in the while loop.

Here is how I\'m doing it in PH

Answer 1

PEP 572 proposes Assignment Expressions and has already been accepted. Starting with Python 3.8, you will be able to write:

while name := input("Name: "):
    names.append(name)

Quoting the Syntax and semantics part of the PEP for some more examples:

# Handle a matched regex
if (match := pattern.search(data)) is not None:
    # Do something with match

# A loop that can't be trivially rewritten using 2-arg iter()
while chunk := file.read(8192):
   process(chunk)

# Reuse a value that's expensive to compute
[y := f(x), y**2, y**3]

# Share a subexpression between a comprehension filter clause and its output
filtered_data = [y for x in data if (y := f(x)) is not None]