\w
Match letters, numbers and underscores
\W
Match characters that are not letters, numbers, and underscores
\s
Matches any blank character, which is equivalent to [\\t\\n\\r\\f]
\S
Match any non-blank character
\d
Matches any number, which is equivalent to [0-9]
\D
Match any non-digit character
\A
Match the beginning of the string
\Z
Match the end of the string, if there is a newline, only match to the ending string before the newline
\z
Match the end of the string, if there is a newline, it will also match the newline
\G
Match the position where the last match was completed
\n
Matches a newline character
\t
Matches a tab
^
Match the beginning of a line of string
$
Match the end of a line
.
Match any character, except for the newline character, when the re.DOTALL tag is specified, it can match any character including the newline character
[...]
Used to represent a group of characters, listed separately, such as [amk] matching a, m or k
[^...]
Not [] characters, such as [^abc] addition to matching a, b, c characters other than
*
Match 0 or more expressions
+
Match 1 or more expressions
?
Match 0 or 1 fragment defined by the previous regular expression, non-greedy way
{n}
Exactly match the n previous expression
{n, m}
Matching n the m time segment defined by the preceding regular expression greedy manner
a|b
Match a or b
( )
Matches the expression in parentheses, also represents a group