Unicode error on Windows

[hwchase17]

File "C:\ProgramData\Anaconda3\envs\LangChain\lib\encodings\cp1252.py", line 23, in decode
          return codecs.charmap_decode(input,self.errors,decoding_table)[0]
      UnicodeDecodeError: 'charmap' codec can't decode byte 0x8f in position 8: character maps to <undefined>

[hwchase17]

enabling unicode system wide (PYTHONUTF8=1) should be a temporary fix

[ragvendra3898]

where to put this (PYTHONUTF8=1)?