What does \ r mean in python?
I first saw it used in building regular expressions across multiple lines as a method argument to Show
For example:
So what does
Remi Guan 20.5k17 gold badges62 silver badges83 bronze badges asked Jan 24, 2011 at 8:48
1 The For an example:
Source: Python string literals answered Jan 24, 2011 at 8:49
2 It means that escapes won’t be translated. For example:
is a string with a backslash followed by the letter
answered Jan 24, 2011 at 8:49
1 Not the answer you're looking for? Browse other questions tagged python string syntax literals rawstring or ask your own question.Summary: in this tutorial, you will learn about the Python raw strings and how to use them to handle strings that treat the backslashes as literal characters. Introduction the Python raw stringsIn Python, when you prefix a string with the letter Raw strings are useful when you deal with strings that have many backslashes, for example, regular expressions or directory paths on Windows. To represent special characters such as tabs and newlines, Python uses the backslash (
Output:
However, raw strings treat the backslash
(
Output:
A raw string is like its regular string with the backslash (
In a regular string, Python counts an escape sequence as a single character:
However, in a raw string, Python counts the backslash (
Since the backslash ( For example:
Error:
Or
Error:
Use raw strings to handle file path on WindowsWindows OS uses backslashes to separate paths. For example:
If you use this path as a regular string, Python will issue a number of errors:
Error:
Python treats \u in the path as a Unicode escape but couldn’t decode it. Now, if you escape the first backslash, you’ll have other issues:
Output:
In this example, the To make it easy, you can turn the path into a raw string like this:
Convert a regular string into a raw stringTo convert a regular string into a raw string, you use the built-in repr() function. For example:
Output:
Note that the result raw string has the quote at the beginning and end of the string. To remove them, you can use slices:
Summary
Did you find this tutorial helpful ? What does \r do in Python string?In Python strings, the backslash "\" is a special character, also called the "escape" character. It is used in representing certain whitespace characters: "\t" is a tab, "\n" is a newline, and "\r" is a carriage return.
What is R format in Python?format() formatting operations; it only works in old-style % string formatting. It indeed converts the object to a representation through the repr() function. In str. format() , ! r is the equivalent, but this also means that you can now use all the format codes for a string.
|