Got solution as below.

Install pyopt library : pip install pyotp

import pyotp

use the topo detail with pyotp as below:

topo = Trading_api_key_details.topo
topt = pyotp.TOTP(topo)
topt = topt.now()
data = obj.generateSession(username,pwd,topt)
refreshToken= data['data']['refreshToken']
print(data)

Got solution as below.

Install pyopt library : pip install pyotp

import pyotp

use the topo detail with pyotp as below:

topo = Trading_api_key_details.topo
topt = pyotp.TOTP(topo)
topt = topt.now()
data = obj.generateSession(username,pwd,topt)
refreshToken= data['data']['refreshToken']
print(data)

@whemant update the smartapi with command pip install smartapi-python --upgrade

after upgraded the smartapi and providing the TOPO details, getting below error while generating the session. data = obj.generateSession(username,pwd,topo) Please provide the solution JSONDecodeError Traceback (most recent call last) C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in request(self, route, method, parameters) 187 try: --> 188 data = json.loads(r.content.decode("utf8")) 189 C:\ProgramData\Anaconda3\lib\json_init.py in loads(s, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw) 345 parse_constant is None and object_pairs_hook is None and not kw): --> 346 return _default_decoder.decode(s) 347 if cls is None: C:\ProgramData\Anaconda3\lib\json\decoder.py in decode(self, s, _w) 336 """ --> 337 obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 338 end = _w(s, end).end() C:\ProgramData\Anaconda3\lib\json\decoder.py in raw_decode(self, s, idx) 354 except StopIteration as err: --> 355 raise JSONDecodeError("Expecting value", s, err.value) from None 356 return obj, end JSONDecodeError: Expecting value: line 1 column 1 (char 0) During handling of the above exception, another exception occurred: DataException Traceback (most recent call last) ~\AppData\Local\Temp/ipykernel_4956/2840288024.py in <module> ----> 1 data = obj.generateSession(username,pwd,topo) C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in generateSession(self, clientCode, password, totp) 226 227 params={"clientcode":clientCode,"password":password,"totp":totp} --> 228 loginResultObject=self._postRequest("api.login",params) 229 230 if loginResultObject['status']==True: C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in _postRequest(self, route, params) 218 def _postRequest(self, route, params=None): 219 """Alias for sending a POST request.""" --> 220 return self._request(route, "POST", params) 221 def _getRequest(self, route, params=None): 222 """Alias for sending a GET request.""" C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in _request(self, route, method, parameters) 189 190 except ValueError: --> 191 raise ex.DataException("Couldn't parse the JSON response received from the server: {content}".format( 192 content=r.content)) 193 DataException: Couldn't parse the JSON response received from the server: b''

after upgraded the smartapi and providing the TOPO details, getting below error while generating the session.

data = obj.generateSession(username,pwd,topo)
Please provide the solution

JSONDecodeError Traceback (most recent call last)
C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in _request(self, route, method, parameters)
187 try:
--> 188 data = json.loads(r.content.decode("utf8"))
189

C:\ProgramData\Anaconda3\lib\json_init_.py in loads(s, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
345 parse_constant is None and object_pairs_hook is None and not kw):
--> 346 return _default_decoder.decode(s)
347 if cls is None:

C:\ProgramData\Anaconda3\lib\json\decoder.py in decode(self, s, _w)
336 """
--> 337 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
338 end = _w(s, end).end()

C:\ProgramData\Anaconda3\lib\json\decoder.py in raw_decode(self, s, idx)
354 except StopIteration as err:
--> 355 raise JSONDecodeError("Expecting value", s, err.value) from None
356 return obj, end

JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

DataException Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_4956/2840288024.py in <module>
----> 1 data = obj.generateSession(username,pwd,topo)

C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in generateSession(self, clientCode, password, totp)
226
227 params={"clientcode":clientCode,"password":password,"totp":totp}
--> 228 loginResultObject=self._postRequest("api.login",params)
229
230 if loginResultObject['status']==True:

C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in _postRequest(self, route, params)
218 def _postRequest(self, route, params=None):
219 """Alias for sending a POST request."""
--> 220 return self._request(route, "POST", params)
221 def _getRequest(self, route, params=None):
222 """Alias for sending a GET request."""

C:\ProgramData\Anaconda3\lib\site-packages\smartapi\smartConnect.py in _request(self, route, method, parameters)
189
190 except ValueError:
--> 191 raise ex.DataException("Couldn't parse the JSON response received from the server: {content}".format(
192 content=r.content))
193

DataException: Couldn't parse the JSON response received from the server: b''

@raa upgrade the smart api with pip install smartapi-python --upgrade