Updated answer In the context of the question, we are dealing with pseudocode, but starting in Python 3.8, := is actually a valid operator that allows for assignment of variables within expressions: # Handle a matched regex if (match := pattern.search(data)) is not None: # Do something with match # A loop that can’t be … Read more
PEP 572 contains many of the details, especially for the first question. I’ll try to summarise/quote concisely arguably some of the most important parts of the PEP: Rationale Allowing this form of assignment within comprehensions, such as list comprehensions, and lambda functions where traditional assignments are forbidden. This can also facilitate interactive debugging without the … Read more
PEP 572 contains many of the details, especially for the first question. I’ll try to summarise/quote concisely arguably some of the most important parts of the PEP: Rationale Allowing this form of assignment within comprehensions, such as list comprehensions, and lambda functions where traditional assignments are forbidden. This can also facilitate interactive debugging without the … Read more