import re
subject = '[]{}&&& ThisIs(OK)'
regex = re.compile(r'\([^)]*\)|([^a-z()]+)')
# put Group 1 captures in a list
matches = [group for group in re.findall(regex, subject) if group]
print("\n" + "*** Matches ***")
if len(matches)>0:
for match in matches:
print (match)
aW1wb3J0IHJlCnN1YmplY3QgPSAnW117fSYmJiBUaGlzSXMoT0spJwpyZWdleCA9IHJlLmNvbXBpbGUocidcKFteKV0qXCl8KFteYS16KCldKyknKQojIHB1dCBHcm91cCAxIGNhcHR1cmVzIGluIGEgbGlzdAptYXRjaGVzID0gW2dyb3VwIGZvciBncm91cCBpbiByZS5maW5kYWxsKHJlZ2V4LCBzdWJqZWN0KSBpZiBncm91cF0KCnByaW50KCJcbiIgKyAiKioqIE1hdGNoZXMgKioqIikKaWYgbGVuKG1hdGNoZXMpPjA6Cglmb3IgbWF0Y2ggaW4gbWF0Y2hlczoKCSAgICBwcmludCAobWF0Y2gpCg==