SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 5-6: truncated \UXXXXXXXX escape code example

Example 1: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe9 in position 2892: invalid continuation byte

As suggested by Mark Ransom, I found the right encoding for that problem.
The encoding was "ISO-8859-1", so replacing

open("u.item", encoding="utf-8")
with
open('u.item', encoding = "ISO-8859-1")

will solve the problem.

Example 2: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe7 in position 5: invalid continuation byte

pd.read_csv('ml-100k/u.item', sep='|', names=m_cols , encoding='latin-1')

Example 3: SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 15-16: truncated \UXXXXXXXX escape

"c:\\user\\path\\to\\file"
r"c:\user\path\to\file
# this happens because \u is the default escape code for unicode and is fixed
# either by using double slashes (no \u anymore) or converting to raw string

Example 4: SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 5-6: truncated \UXXXXXXXX escape

#With 'r' works very well. For example:
print(r"C:\Users\Eric\Desktop\beeline.txt")