what is %r used for in python code example

Example 1: r"" python

# a Rstring is a string that treat backslashs as normals caracters
#Exemple:
#normal string
>>> print("This is a line feed : \n and it's usefull!")
This is a line feed :
and it's usefull!
# R-string
>>> print(r"This is not a line feed /n :(")
This is not a line feed /n :(
 
# It's mostly used to write Paths
# Exemple
my_path = "C:\Users\Me\Desktop\MyFile.txt" #Don't works a all but
my_path = r"C:\Users\Me\Desktop\MyFile.txt" #Totaly work!

Example 2: r vs python

# R is more of a statistical analysis programming language. If you want to
# perform statistical analysis using Python, it's recommended to use the
# Pandas library.