Given a list xs and a value item, how can I check whether xs contains item (i.e., if any of the elements of xs is equal to item)? Is there something like xs.contains(item)? For performance considerations, see Fastest way to check if a value exists in a list. Answer Use: Also, inverse operation: It works fine for lists, tuples, sets
Tag: search
How to find out the words begin with vowels in a list?
My code doesn’t right, and it will print out all the words in the original list. Answer You can also use a list comprehension like this
In Python, how to check if a string only contains certain characters?
In Python, how to check if a string only contains certain characters? I need to check a string containing only a..z, 0..9, and . (period) and no other character. I could iterate over each character and check the character is a..z or 0..9, or . but that would be slow. I am not clear now how to do it with
What is the difference between re.search and re.match?
What is the difference between the search() and match() functions in the Python re module? I’ve read the Python 2 documentation (Python 3 documentation), but I never seem to remember it. I keep having to look it up and re-learn it. I’m hoping that someone will answer it clearly with examples so that (perhaps) it will stick in my head.