converting png formatted text received from API to png file - python

Question

trying to make a program in python that request the following api and return with a QRcode. this QRcode i get back is actually formatted text and i need to put that into a PNG file. this is my code

import requests
import os


user = os.getlogin()
print("Hi there, " + user)
text = input("Enter a word: ")
request = requests.get("https://api.qrserver.com/v1/create-qr-code/?size=150x150&data=" + text)
response = request.text

file = open("output.txt", "w")
file.write(response)
file.close()
print("\nDone !")

put i get this error when trying to save it as png or text:

'charmap' codec can't encode character '\ufffd' in position 0: character maps to <undefined>

Paul M. · Accepted Answer · 2020-11-18 12:54:04Z

2

Not sure what you mean when you say:

this QRcode i get back is actually formatted text and i need to put that into a PNG file

The response you get is not plain-text. You can check the response headers' Content-Type field and confirm that it is an image (image/png). All you have to do is write the response bytes to a file:

def main():

    import requests

    text = "test"
    url = f"https://api.qrserver.com/v1/create-qr-code/?size=150x150&data={text}"

    response = requests.get(url)
    response.raise_for_status()

    with open("output.png", "wb") as file:
        file.write(response.content)

    print("Done.")

    return 0


if __name__ == "__main__":
    import sys
    sys.exit(main())

answered Nov 18, 2020 at 12:54

Paul M.

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3 Comments

darkness Over a year ago

oh, never heard of .content ! let me try it out i get back to you...

darkness Over a year ago

yup the issue here was that i used .text instead of .content . thanks ! i'll mark it as correct.

Paul M. Over a year ago

Glad it's working! Also be aware of the write-bytes (wb) mode when writing to the file.

berkesonmez · Accepted Answer · 2020-11-18 12:56:36Z

1

If you want to save response as png you can do it like this

import requests
import os

user = os.getlogin()
print("Hi there, " + user)
text = input("Enter a word: ")
request = requests.get(
    "https://api.qrserver.com/v1/create-qr-code/?size=150x150&data=" + text)

open(text+'.png', 'wb').write(request.content)

print("Done !")

answered Nov 18, 2020 at 12:56

berkesonmez

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