By passing re.DOTALL as the second argument to re.compile(), you can make the dot character match all characters, including the newline character: > no_newline_regex = re. The dot-star will match everything except a newline. group ( ) # ' for dinner.>' Matching newlines with the Dot character The question mark tells Python to match in a non-greedy way: > non_greedy_regex = re. To match any and all text in a non-greedy fashion, use the dot, star, and question mark (. * uses greedy mode: It will always try to match as much text as possible. search ( 'First Name: Al Last Name: Sweigart' ) > mo. compile ( r'First Name: (.*) Last Name: (.*)' ) > mo = name_regex. findall ( 'The cat in the hat sat on the flat mat.' ) Matching everything with Dot-Star > name_regex = re. (or dot) character in a regular expression will match any character except for a newline: > at_regex = re. search ( '12 34567890' ) is None # True The Wildcard character search ( '12345xyz67890' ) is None # True > whole_string_is_num. search ( 'He said hello.' ) is None # True search ( 'Hello world!' ) # > begins_with_hello. compile ( r'^Hello' ) > begins_with_hello. The r'^Hello’ regular expression string matches strings that begin with ‘Hello’: > begins_with_hello = re. Likewise, you can put a dollar sign $ at the end of the regex to indicate the string must end with this regex pattern.Īnd you can use the ^ and $ together to indicate that the entire string must match the regex. You can also use the caret symbol ^ at the start of a regex to indicate that a match must occur at the beginning of the searched text. BABY FOOD.' ) # The Caret and Dollar sign characters For example, the character class will match all lowercase letters, uppercase letters, and numbers.īy placing a caret character ( ^) just after the character class’s opening bracket, you can make a negative character class that will match all the characters that are not in the character class: > consonant_regex = re. You can also include ranges of letters or numbers by using a hyphen. For example, the character class will match any vowel, both lowercase and uppercase. You can define your own character class using square brackets. findall ( 'Cell: 41 Work: 21' ) # Making your own character classes compile ( r'\d\d\d-\d\d\d-\d\d\d\d' ) # has no groups > phone_num_regex. The findall() method will return the strings of every match in the searched string. group ( ) # 'HaHaHa' The findall() method search ( 'My number is 41.' ) > print ( f'Phone number found: ?' ) > mo2 = non_greedy_ha_regex. Matching regex objects > phone_num_regex = re. Performs a non-greedy match of the preceding p.Īny character, except newline characters.Ī digit, word, or space character, respectively.Īnything except a digit, word, or space, respectively.Īny character between the brackets (such as a, b, ).Īny character that isn’t between the brackets. Call the Match object’s group() method to return a string of the actual matched text.Īll the regex functions in Python are in the re module: > import reĪt least n and at most m of the preceding p.
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