try: import ure as re except ImportError: import re r = re.compile(".+") m = r.match("abc") print(m.group(0)) try: m.group(1) except IndexError: print("IndexError") # conversion of re and match to string str(r) str(m) r = re.compile("(.+)1") m = r.match("xyz781") print(m.group(0)) print(m.group(1)) try: m.group(2) except IndexError: print("IndexError") r = re.compile("[a-cu-z]") m = r.match("a") print(m.group(0)) m = r.match("z") print(m.group(0)) m = r.match("d") print(m) m = r.match("A") print(m) print("===") r = re.compile("[^a-cu-z]") m = r.match("a") print(m) m = r.match("z") print(m) m = r.match("d") print(m.group(0)) m = r.match("A") print(m.group(0)) r = re.compile("o+") m = r.search("foobar") print(m.group(0)) try: m.group(1) except IndexError: print("IndexError") m = re.match(".*", "foo") print(m.group(0)) m = re.search("w.r", "hello world") print(m.group(0)) m = re.match('a+?', 'ab'); print(m.group(0)) m = re.match('a*?', 'ab'); print(m.group(0)) m = re.match('^ab$', 'ab'); print(m.group(0)) m = re.match('a|b', 'b'); print(m.group(0)) m = re.match('a|b|c', 'c'); print(m.group(0)) try: re.compile("*") except: print("Caught invalid regex")