IDE is vs code. Practice regular expressions according to the code in the book, but keep prompting errors. The error code is
Anomalous backslash in string:"s expressions. String constant might be missing an r prefix.
the picture is as follows
IDE is vs code. Practice regular expressions according to the code in the book, but keep prompting errors. The error code is
Anomalous backslash in string:"s expressions. String constant might be missing an r prefix.
the picture is as follows
\ is used as an escape symbol in Python, and\ s represents a escape character in Python syntax. However, there is no such character in the escape character table, so an error is reported.
to represent the\ s in a regular expression, that is, a\ plus an s with a total of two characters, there are two ways, one is to use two\ to escape the backslash itself, and then s, that is, \ s ; the other is to add an r to the string to indicate that the string is interpreted literally without escaping, that is, r'\ s'.
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