Portal login error

Question

Greetings,

I am using the ESRI sample code to generate a token (Scripting with the ArcGIS REST API—Portal for ArcGIS | Documentation for ArcGIS Enterprise ), getting an expected type error??

Error is Expected type 'Optional[bytes]', got 'str' instead??

I updated the code for Python 3.

### Python 3.8

def generateToken(username, password, portalUrl😞
'''Retrieves a token to be used with API requests.'''
 portalUrl = myurl
 username = myuser
 password = mypassword

parameters = urllib.parse.urlencode({'username' : username,
 'password' : password,
 'client' : 'referer',
 'referer' : portalUrl,
 'expiration' : 60,
 'f' : 'json'})
print("Read parameters")
 response = urllib.request.urlopen(portalUrl + '/sharing/rest/generateToken?', parameters).read()

print("response")

try:
 jsonResponse = json.loads(response)
if 'token' in jsonResponse:
return jsonResponse['token']
elif 'error' in jsonResponse:
print(jsonResponse['error']['message'])
for detail in jsonResponse['error']['details']:
print(detail)
except ValueError:
print('An unspecified error occurred.')

## End

All I get is the error message:
Expected type 'Optional[bytes]', got 'str' instead

Appreciate any assistance and pointers.

Regards,

Clive

MehdiPira1 · Accepted Answer

Hi Clive Swan‌, You need to add encode(“utf-8”) at the end of line 14. The code will be like so: import urllib import json def generateToken(username, password, portalUrl): '''Retrieves a token to be used with API requests. portalUrl = myurl username = myuser password = mypassword''' parameters = urllib.parse.urlencode({'username' : username, 'password' : password, 'client' : 'referer', 'referer' : portalUrl, 'expiration' : 60, 'f' : 'json'}).encode("utf-8") print("Read parameters") response = urllib.request.urlopen(portalUrl + '/sharing/rest/generateToken?', parameters).read() print("response") try: jsonResponse = json.loads(response) if 'token' in jsonResponse: return jsonResponse['token'] elif 'error' in jsonResponse: print(jsonResponse['error']['message']) for detail in jsonResponse['error']['details']: print(detail) except ValueError: print('An unspecified error occurred.')‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ ------------------------------------------------------------------------------------------------------------------------------------ Please mark as helpful if you find it helpful. If it answered your question please mark it as answered.