R before string python

"""In the string, there is a special character: the escape character \, such as: \a Bell (BEL) \b backspace \t tab \r Carriage return (CR), move the current position to the beginning of this line \n Line feed (LF), move the current position to the beginning of the next line \\ represents a backslash \ \'represents a single quote ' \" represents a double quote " \? represents a question mark? In the string, it will be automatically escaped when it encounters the above character combination Adding r before a string in Python is equivalent to adding a \ before all \, which becomes \\, \\ is escaped to \, thus avoiding \ escaping n, t, r and other characters, and \ no longer Represents escape characters (escaping is prohibited)""" str1 ='\n' # n is escaped, representing a newline characterprint('str1:', str1, repr(str1), len(str1)) str2 = r'\n' # Add r, add another \ before \. According to the left-to-right operation rule, \\ escapes as \, n exists alone, and the final result is two characters: \ nprint('str2:', str2, repr(str2), len(str2), str2[0], str2[1])  # str2: \n '\\n' 2 \ n str3 ='\\n' # Equivalent to str2print('str3:', str3, repr(str3), len(str3), str3[0], str3[1])  # str3: \n '\\n' 2 \ n  # Thinking: Why do the following paths report errors? # Reason: \ is recognized as an escape character combined with \U to cause an errorpath1 = 'C:\Users\Administrator\Desktop\1.jpg' # Modify:path2 = 'C:\\Users\\Administrator\\Desktop\\1.jpg'path3 = r'C:\Users\Administrator\Desktop\1.jpg'

-1

Source: programmersought.com

Similar codes

0 vote237 views1 answer
Latex maths to python parser
Python
0 vote234 views1 answer
Df select custom index
Python
0 vote234 views1 answer
Python enumerate conditional statements
Python
4 votes236 views1 answer
Python unlist flatten nested lists
Python
4 votes257 views2 answers
How to concat on the basis of particular columns in pandas
Python
4 votes281 views1 answer
Install python 3.9 ubuntu
Python
0 vote303 views1 answer
What does eval function do in python stack overflow
Python
0 vote191 views1 answer
Replace all string in list python
Python
0 vote266 views2 answers
The print() Function
Python
1 vote240 views1 answer
Filter dict
Python