How to check if *either* character is in a string in Python? [closed]

Question

I know about:

if 'a' in 'cat':
    win()

but is there a better way to finding if either of two letters exist in a string?

The following are some ways,

if 'a' in 'cat' or 'd' in 'cat':
    win()

if re.search( '.*[ad].*', 'cat' ):
    win()

but is there something cleaner/faster/clearer?

Like,

# not actual python code
if either ['a', 'd'] in 'cat':
    win()

Answer 1

You can use the any() function:

if any(item in 'cat' for item in ['a', 'd']):  # Will evaluate to True
    win()

There is also the all() function which will check if all conditions are true:

if all(item in 'cat' for item in ['a', 'd']):  # Will evaluate to False
    win()

Answer 2

You could use sets:

if set('ab').intersection(set('cat')):
    win()