Unable to import DatastreamDSWS

abbanerjee

Traceback (most recent call last):

File "getPythonData.py", line 13, in <module>

import DatastreamDSWS as dsws

File "/home/ubuntu/.local/lib/python3.5/site-packages/DatastreamDSWS/__init__.py", line 11, in <module>

from .DS_Response import Datastream

File "/home/ubuntu/.local/lib/python3.5/site-packages/DatastreamDSWS/DS_Response.py", line 9, in <module>

import pandas as pd

File "/home/ubuntu/.local/lib/python3.5/site-packages/pandas/__init__.py", line 55, in <module>

from pandas.core.api import (

File "/home/ubuntu/.local/lib/python3.5/site-packages/pandas/core/api.py", line 5, in <module>

from pandas.core.arrays.integer import (

File "/home/ubuntu/.local/lib/python3.5/site-packages/pandas/core/arrays/__init__.py", line 1, in <module>

from .array_ import array # noqa: F401

File "/home/ubuntu/.local/lib/python3.5/site-packages/pandas/core/arrays/array_.py", line 7, in <module>

from pandas.core.dtypes.common import (

File "/home/ubuntu/.local/lib/python3.5/site-packages/pandas/core/dtypes/common.py", line 11, in <module>

from pandas.core.dtypes.dtypes import (

File "/home/ubuntu/.local/lib/python3.5/site-packages/pandas/core/dtypes/dtypes.py", line 53, in <module>

class Registry:

File "/home/ubuntu/.local/lib/python3.5/site-packages/pandas/core/dtypes/dtypes.py", line 84, in Registry

self, dtype: Union[Type[ExtensionDtype], str]

File "/usr/lib/python3.5/typing.py", line 552, in __getitem__

dict(self.__dict__), parameters, _root=True)

File "/usr/lib/python3.5/typing.py", line 512, in __new__

for t2 in all_params - {t1} if not isinstance(t2, TypeVar)):

File "/usr/lib/python3.5/typing.py", line 512, in <genexpr>

for t2 in all_params - {t1} if not isinstance(t2, TypeVar)):

File "/usr/lib/python3.5/typing.py", line 1077, in __subclasscheck__

if super().__subclasscheck__(cls):

File "/usr/lib/python3.5/abc.py", line 225, in __subclasscheck__

for scls in cls.__subclasses__():

TypeError: descriptor '__subclasses__' of 'type' object needs an argument

wasin.w

Hello @abbanerjee

Based a the given stack trace, I assume that you are using Python version 3.5.x.

Please note that DatastreamDSWS for Python supports Python version 3.6 and above. (see "Requirement" section in Getting Start with Python document). I suggest you upgrade the Python version that run Datastream application.

I can replicate the same kind of error messages with Python 3.5.6. If I change to newer version, I did not encounter the problem.