Python EncodeDecode error

[FrancoisBlas]

Hi !
I'm trying to manipulate images but I can't get rid of that error :

fichier=open("photo.jpg","r")

lignes=fichier.readlines()
Traceback (most recent call last):

  File "<ipython-input-32-87422df77ac2>", line 1, in <module>
    lignes=fichier.readlines()

  File "C:\Winpython\python-3.5.4.amd64\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 0x90 in position 207: character maps to <undefined>
I've seen forums where people say to add encoding='utf-8' in the "open ..." but that won't work

[snippsat]

jpg is a binary file.
Unlike normal/pain text files an image file does not have any encoding,the data shown is a visual representation of the binary equivalent of the image.
Use rb and wb.

fichier = open("photo.jpg", "rb")

There are several libraries for manipulate images in Python,eg the most known Pillow.

[FrancoisBlas]

thanks ! it works now !