what is this mean.SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape code example

Example: SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape” Code Answer

pandas.read_csv(r"C:\Users\DeePak\Desktop\myac.csv")
pandas.read_csv(r'C:\Users\DeePak\Desktop\myac.csv')
pandas.read_csv('C:/Users/DeePak/Desktop/myac.csv')
pandas.read_csv('C:\\Users\\DeePak\\Desktop\\myac.csv')