Python Requires Chilkat v11.7.0+

Generate a QR Code PNG in Memory

See more QR Code Examples

Demonstrates getting a QR code image without writing a file. With no output options the result is a PNG returned as base64 in outputs[0].base64 of the response. The example decodes it into a BinData, which holds the bytes of the PNG to send in an HTTP response, store in a database, attach to an email, or save. Chilkat2-Python

import sys
import chilkat2

success = False

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

json = chilkat2.JsonObject()
json.UpdateString("payload.text","https://www.chilkatsoft.com/")
json.UpdateInt("render.moduleSize",6)

fmt = chilkat2.Formats()
jsonOut = chilkat2.JsonObject()
success = fmt.QrCode("generate",json,jsonOut)
if (success == False):
    print(fmt.LastErrorText)
    sys.exit()

print("format: " + jsonOut.StringOf("outputs[0].format"))
print("MIME type: " + jsonOut.StringOf("outputs[0].mimeType"))
print("image: " + str(jsonOut.IntOf("outputs[0].width")) + " x " + str(jsonOut.IntOf("outputs[0].height")) + " pixels")

# outputs[0].base64 is the PNG file, base64 encoded.
bdPng = chilkat2.BinData()
success = bdPng.AppendEncoded(jsonOut.StringOf("outputs[0].base64"),"base64")
if (success == False):
    print(bdPng.LastErrorText)
    sys.exit()

print("PNG bytes: " + str(bdPng.NumBytes))

# The BinData holds the image.  Here it is simply saved.
success = bdPng.WriteFile("qa_output/qr_in_memory.png")
if (success == False):
    print(bdPng.LastErrorText)
    sys.exit()

# The PNG held in bdPng:

# 

# Sample output:

# format: png
# MIME type: image/png
# image: 222 x 222 pixels
# PNG bytes: 877