TypeError: POST data should be bytes, an iterable of bytes, or a file object. It cannot be of type str while trying to pass PUT request in python

Question

I am trying to pass a list of dictionaries(strings) to a for a put request. I am getting this error:

TypeError: POST data should be bytes, an iterable of bytes.

Is this the right way to make a put request with list of dictionaries(strings) in python.

list looks like the following:

list1 = ['{"id" : "","email" : "[email protected]","fullName": "John Lorang"}', '{"id" : "","email" : "[email protected]","fullName": "Lola Dsilva"}']


myData = json.dumps(list1)
myRestRequestObj = urllib.request.Request(url,myData)
myRestRequestObj.add_header('Content-Type','application/json')
myRestRequestObj.add_header('Authorization','Basic %s')
myRestRequestObj.get_method = lambda : 'PUT'
try:
  myRestRequestResponse = urllib.request.urlopen(myRestRequestObj)
except urllib.error.URLError as e:
        print(e.reason)

Answer 1

As you said in a comment, you cannot use requests (that's pretty sad to hear!), so I did another snippet using urllib (the short answer: you must .encode('utf-8') json.dumps and decode('utf-8') response.read()):

import urllib.request
import urllib.error
import json

url = 'http://httpbin.org/put'
token = 'jwtToken'

list1 = ['{"id" : "","email" : "[email protected]","fullName": "John Lorang"}', '{"id" : "","email" : "[email protected]","fullName": "Lola Dsilva"}']

# Request needs bytes, so we have to encode it
params = json.dumps(list1).encode('utf-8')
headers = {
    'Content-Type': 'application/json',
    'Authorization': 'Basic {token}'.format(token=token)
}

# Let's try to create our request with data, headers and method
try:
    request = urllib.request.Request(url, data=params, headers=headers, method='PUT')
except urllib.error.URLError as e:
    # Unable to create our request, here the reason
    print("Unable to create youro request: {error}".format(error=str(e)))
else:
    # We did create our request, let's try to use it
    try:
        response = urllib.request.urlopen(request)
    except urllib.error.HTTPError as e:
        # An HTTP error occured, here the reason
        print("HTTP Error: {error}".format(error=str(e)))
    except Exception as e:
        # We got another reason, here the reason
        print("An error occured while trying to put {url}: {error}".format(
            url=url,
            error=str(e)
        ))
    else:
        # We are printing the result
        # We must decode it because response.read() returns a bytes string
        print(response.read().decode('utf-8'))

I did try to add some comments. I hope this solution help you!

To help you learn a better way to learn python, you should read the Style Guide for Python Code