Python 3 urllib produces TypeError: POST data should be bytes or an iterable of bytes. It cannot be of type str

Question

I am trying to convert working Python 2.7 code into Python 3 code and I am receiving a type error from the urllib request module.

I used the inbuilt 2to3 Python tool

Answer 1

Try this:

url = 'https://www.customdomain.com'
d = dict(parameter1="value1", parameter2="value2")

f = urllib.parse.urlencode(d)
f = f.encode('utf-8')

req = urllib.request.Request(url, f)

Your problem lies in the way you were handling the dictionary.