CODEWITHSUNDEEP
pythonpython-imaging-library
doniyor
doniyor

Reputation: 37846

Python PIL - open image from file object: File not open for reading

imgfile = open('myimage.png', 'wb')
imgfile.write(decodestring(base64_image))

f = Image.open(imgfile)

imgfile.close()

i am being able to write() base64 string as image into imgfile. but when I try to open this file with PIL, i am getting

File not open for reading

what am I doing wrong?

Upvotes: 0

Views: 6408

Answers (2)

Martijn Pieters
Martijn Pieters

Reputation: 1121186

You opened the file for writing, not reading. You'd have to use a dual mode, and first rewind the file pointer:

with open('myimage.png', 'w+b') as imgfile:
    imgfile.write(decodestring(base64_image))
    imgfile.seek(0)
    f = Image.open(imgfile)

Here w+ means writing and reading, see the open() documentation:

'+'
open a disk file for updating (reading and writing)

For binary read-write access, the mode 'w+b' opens and truncates the file to 0 bytes. 'r+b' opens the file without truncation.

However, there isn't really any need to use a file on disk here; use an in-memory file instead:

from io import BytesIO

imgfile = BytesIO(decodestring(base64_image))
f = Image.open(imgfile)

Upvotes: 2

Sebi
Sebi

Reputation: 1436

The problem here is that you are opening the file for writing with wb, use w+b to open for reading as well.

Detailed explanation in the docs here.

Upvotes: 0

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