UnicodeDecodeError:

[snippsat]

If I found such errors in my file, how to handle them?

What are using and how do you read file?

\xa0 is non-breaking space in Latin1 (ISO 8859-1).
To read it with utf-8 you can just ignore error as posted before.

>>> s = b'"2016-02-01","Htech 6605 Wired\xa0 selfie HV-BTM 11","Accessories","Dalma RSC","1","Sales"\r\n'
>>> print(s)
b'"2016-02-01","Htech 6605 Wired\xa0 selfie HV-BTM 11","Accessories","Dalma RSC","1","Sales"\r\n'
>>> type(s)
<class 'bytes'>
>>> print(s.decode('utf-8', errors='ignore'))
"2016-02-01","Htech 6605 Wired selfie HV-BTM 11","Accessories","Dalma RSC","1","Sales"

>>> # latin-1 will work
>>> print(s.decode('latin-1'))
"2016-02-01","Htech 6605 Wired  selfie HV-BTM 11","Accessories","Dalma RSC","1","Sales"

Can do replace then decode utf-8.

>>> s = b'"2016-02-01","Htech 6605 Wired\xa0 selfie HV-BTM 11","Accessories","Dalma RSC","1","Sales"\r\n'
>>> new_string = s.replace(b'\xa0', b'')
>>> print(new_string.decode('utf-8'))
"2016-02-01","Htech 6605 Wired selfie HV-BTM 11","Accessories","Dalma RSC","1","Sales"