error from example

[benjaminmlucas]

when I try to run your example S1denoise script I get this error and can't seem to debug it:

No module named 'nansat._pixfun_py3'
/home/benjamin/.local/lib/python3.8/site-packages/nansat/init.py:30: UserWarning: Cannot register C pixel functions!
Either nansat was not installed using setup.py or
pixel functions were not compiled automatically.
For development, use "python setup.py build_ext --inplace"
to compile pixel functions manually into the source tree.

warnings.warn('''Cannot register C pixel functions!
02:58:06|40|nansat|_get_dataset_metadata|GDAL could not open ../original_images/S1A_EW_GRDM_1SDH_20180717T073809_20180717T073909_022831_0279B9_EBF1.zip, trying to read with Nansat mappers...
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 159, in _new_conn
conn = connection.create_connection(
File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 61, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "/usr/lib/python3.8/socket.py", line 918, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 665, in urlopen
httplib_response = self._make_request(
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 376, in _make_request
self._validate_conn(conn)
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 996, in _validate_conn
conn.connect()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 314, in connect
conn = self._new_conn()
File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 171, in _new_conn
raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.VerifiedHTTPSConnection object at 0x7f1f6b130df0>: Failed to establish a new connection: [Errno -2] Name or service not known

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in send
resp = conn.urlopen(
File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 719, in urlopen
retries = retries.increment(
File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 436, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='qc.sentinel1.eo.esa.int', port=443): Max retries exceeded with url: /product/S1A/AUX_CAL/20171017T080000/S1A_AUX_CAL_V20171017T080000_G20180622T082918.SAFE.TGZ (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f1f6b130df0>: Failed to establish a new connection: [Errno -2] Name or service not known'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "initial_script.py", line 6, in
s1 = Sentinel1Image(zip_file)
File "/home/benjamin/.local/lib/python3.8/site-packages/s1denoise/sentinel1image.py", line 113, in init
self.download_aux_calibration(auxCalibFilename, self.platform.lower())
File "/home/benjamin/.local/lib/python3.8/site-packages/s1denoise/sentinel1image.py", line 131, in download_aux_calibration
r = requests.get(cal_url, stream=True)
File "/usr/lib/python3/dist-packages/requests/api.py", line 75, in get
return request('get', url, params=params, **kwargs)
File "/usr/lib/python3/dist-packages/requests/api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 533, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 646, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python3/dist-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='qc.sentinel1.eo.esa.int', port=443): Max retries exceeded with url: /product/S1A/AUX_CAL/20171017T080000/S1A_AUX_CAL_V20171017T080000_G20180622T082918.SAFE.TGZ (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f1f6b130df0>: Failed to establish a new connection: [Errno -2] Name or service not known'))