There is actually an "official" definition of what an expression in Python is (basically everything that can be evaluated by eval()). And since every function call on a line of its own is an expression statement, …

Jan 19, 2011 · In C, any expression is a legal statement. You can have func(x=2); Is that an Expression or Statement? (Answer: Expression used as a Statement with a side-effect.) The assignment …

117 Since Python 3.8, code can use the so-called "walrus" operator (:=), documented in PEP 572, for assignment expressions. This seems like a really substantial new feature, since it allows this form of …

Sep 4, 2010 · I want to filter strings in a list based on a regular expression. Is there something better than [x for x in list if r.match(x)] ?

Dec 27, 2008 · 214 From the documentation: Conditional expressions (sometimes called a “ternary operator”) have the lowest priority of all Python operations. The expression x if C else y first …

Python: How to use RegEx in an if statement? Asked 13 years ago Modified 2 years, 10 months ago Viewed 312k times

When should you use generator expressions and when should you use list comprehensions in Python? # Generator expression (x*2 for x in range(256)) # List comprehension [x*2 for x in range(256)]

May 14, 2009 · That only makes sense if those expressions have side-effects, like print() or sort(). Normal assignments (=) aren't expressions, so if you want to assign a variable in a lambda you have …

Oct 16, 2009 · Note: Normally an asterisk (*) means "0 or more of the previous thing" but in the example above, it does not have that meaning, since the asterisk is inside of the character class, so it loses its …

The solution is to use Python’s raw string notation for regular expression patterns; backslashes are not handled in any special way in a string literal prefixed with 'r'. So r"\n" is a two-character string …