The QR code generator I made some time ago, except it accepts files.

qrcodegen-file.py

#importing pip like this will fail in the future, should be replaced.
for n in range(1):
        try:
           import pip
        except ImportError as missing:
            print("You don't have pip. Exiting...")
            exit()

#install package function
def install(package):
    pip.main(['install', package])

#qrcode module checker & install
for n in range(1):
        try:
           import qrcode
        except ImportError as missing:
            if input("You don't have the qrcode module. Install it now? [Y/n]").lower() == "y":	
               install(missing.name)
               print("Please run the program again for changes to apply.")
               exit()
            else:
               print("Abort.")
               exit()

#data prompt
data = input("Enter the full or relative path of the PLAINTEXT file you want to convert: ")
file = open(data, "r")

#convert to qr code
output = qrcode.make(file.read())

#ask filename to save as
saveas = input("What do you want the file to be called? ")

#save file
output.save(saveas + ".png")

#print filename
print("Saved as " + saveas + ".png")