Can't install numpy module for Python3 in Onion Omega2+

[vickyysiahaan]

I can't install numpy module in my omega2+. I already extended my memory space using sd card using this instruction (https://docs.onion.io/omega2-docs/boot-from-external-storage.html)

I use pip3 when trying to install numpy.

pip3 install numpy

and then the response i got is

Exception:
Traceback (most recent call last):
File "/usr/lib/python3.6/site-packages/pip/basecommand.py", line 214, in main
status = self.run(options, args)
File "/usr/lib/python3.6/site-packages/pip/commands/install.py", line 299, in run
requirement_set.prepare_files(finder)
File "/usr/lib/python3.6/site-packages/pip/req/req_set.py", line 370, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/usr/lib/python3.6/site-packages/pip/req/req_set.py", line 587, in _prepare_file
session=self.session, hashes=hashes)
File "/usr/lib/python3.6/site-packages/pip/download.py", line 810, in unpack_url
hashes=hashes
File "/usr/lib/python3.6/site-packages/pip/download.py", line 649, in unpack_http_url
hashes)
File "/usr/lib/python3.6/site-packages/pip/download.py", line 842, in _download_http_url
stream=True,
File "/usr/lib/python3.6/site-packages/pip/_vendor/requests/sessions.py", line 487, in get
return self.request('GET', url, **kwargs)
File "/usr/lib/python3.6/site-packages/pip/download.py", line 378, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/usr/lib/python3.6/site-packages/pip/_vendor/requests/sessions.py", line 475, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3.6/site-packages/pip/_vendor/requests/sessions.py", line 585, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3.6/site-packages/pip/_vendor/cachecontrol/adapter.py", line 36, in send
cached_response = self.controller.cached_request(request)
File "/usr/lib/python3.6/site-packages/pip/_vendor/cachecontrol/controller.py", line 111, in cached_request
resp = self.serializer.loads(request, cache_data)
File "/usr/lib/python3.6/site-packages/pip/_vendor/cachecontrol/serialize.py", line 114, in loads
return getattr(self, "_loads_v{0}".format(ver))(request, data)
File "/usr/lib/python3.6/site-packages/pip/_vendor/cachecontrol/serialize.py", line 170, in _loads_v2
cached = json.loads(zlib.decompress(data).decode("utf8"))
zlib.error: Error -5 while decompressing data: incomplete or truncated stream

Please help

[bhack]

Check openwrt/packages#9797 (comment)