[GIS] AttributeError: ‘NoneType’ object has no attribute ‘split’ from arcmap only

arcpy

I'm running a simple python script from arcmap that sends an html post and processes the response. This script runs just fine from pythonwin but for some reason I receive the following error when running the script from an arcmap toolbox: AttributeError: 'NoneType' object has no attribute 'split'

The python code and stack trace is below. I'm stumped why it would run outside of arcmap but not within. I'm sure it's something simple I'm missing. Hopefully someone can point it out. 🙂 

for row in cursor:
        arcpy.SetProgressorLabel("Loading {0}...".format(row))
        url = "https://myurl.com"

        payload = "streetAddress="+row[0]+"&city="+row[1]+"&state="+row[2]+"&zip="+row[3]+"&apikey="+apikey+"&format=csv&census=false&censusYear=2000|2010&notStore=false&version=4.01"

        headers = {
            'accept': "application/x-www-form-urlencoded",
            'content-type': "application/x-www-form-urlencoded",
            'access-control-allow-origin': "*"
            }           

        response = requests.request("POST", url, data=payload, headers=headers)
        responseList = response.text.split(',')

StackTrace:

Traceback (most recent call last):
  File "C:\Development\PythonAddins\TAMUGeocoder.py", line 75, in <module>
    response = requests.request("POST", url, data=payload, headers=headers)
  File "C:\Python27\ArcGIS10.1\lib\site-packages\requests\api.py", line 53, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Python27\ArcGIS10.1\lib\site-packages\requests\sessions.py", line 456, in request
    prep = self.prepare_request(req)
  File "C:\Python27\ArcGIS10.1\lib\site-packages\requests\sessions.py", line 389, in prepare_request
    hooks=merge_hooks(request.hooks, self.hooks),
  File "C:\Python27\ArcGIS10.1\lib\site-packages\requests\models.py", line 293, in prepare
    self.prepare_url(url, params)
  File "C:\Python27\ArcGIS10.1\lib\site-packages\requests\models.py", line 362, in prepare_url
    host = host.encode('idna').decode('utf-8')
  File "C:\Python27\ArcGIS10.1\Lib\encodings\idna.py", line 157, in encode
    labels = dots.split(input)
AttributeError: 'NoneType' object has no attribute 'split'

Best Answer

The error 

AttributeError: 'NoneType' object has no attribute 'split'

often indicates that the attribute you are trying to split is Null, meaning there is no value in it to split.

You need to check the attribute is not Null before splitting. Something like 

if not response.text == None: 
    responseList = response.text.split(',')
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