README Example Faisl With [SSL: CERTIFICATE_VERIFY_FAILED]

[adamhsparks]

I'm attempting to test out the package but the example from the README doesn't work on my MacBook with a fresh Python 3.12 installation.

>>> from datetime import datetime
>>> import matplotlib.pyplot as plt
>>> from meteostat import Point, Daily
>>> # Set time period
>>> 
>>> start = datetime(2018, 1, 1)
>>> end = datetime(2018, 12, 31)
>>> # Create Point for Vancouver, BC
>>> 
>>> location = Point(49.2497, -123.1193, 70)
>>> # Get daily data for 2018
>>> 
>>> data = Daily(location, start, end)
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/urllib/request.py", line 1344, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py", line 1331, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py", line 1377, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py", line 1326, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py", line 1085, in _send_output
    self.send(msg)
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py", line 1029, in send
    self.connect()
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/http/client.py", line 1472, in connect
    self.sock = self._context.wrap_socket(self.sock,
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/ssl.py", line 455, in wrap_socket
    return self.sslsocket_class._create(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/ssl.py", line 1042, in _create
    self.do_handshake()
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/ssl.py", line 1320, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1000)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/.../lib/python3.12/site-packages/meteostat/interface/daily.py", line 98, in __init__
    self._init_time_series(loc, start, end, model, flags)
  File "/Users/.../lib/python3.12/site-packages/meteostat/interface/timeseries.py", line 156, in _init_time_series
    stations = loc.get_stations("daily", start, end, model)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/meteostat/interface/point.py", line 76, in get_stations
    stations = Stations()
               ^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/meteostat/interface/stations.py", line 107, in __init__
    self._load()
  File "/Users/.../lib/python3.12/site-packages/meteostat/interface/stations.py", line 90, in _load
    df = load_handler(
         ^^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/meteostat/core/loader.py", line 82, in load_handler
    df = pd.read_csv(
         ^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/pandas/io/parsers/readers.py", line 1026, in read_csv
    return _read(filepath_or_buffer, kwds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/pandas/io/parsers/readers.py", line 620, in _read
    parser = TextFileReader(filepath_or_buffer, **kwds)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/pandas/io/parsers/readers.py", line 1620, in __init__
    self._engine = self._make_engine(f, self.engine)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/pandas/io/parsers/readers.py", line 1880, in _make_engine
    self.handles = get_handle(
                   ^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/pandas/io/common.py", line 728, in get_handle
    ioargs = _get_filepath_or_buffer(
             ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/pandas/io/common.py", line 384, in _get_filepath_or_buffer
    with urlopen(req_info) as req:
         ^^^^^^^^^^^^^^^^^
  File "/Users/.../lib/python3.12/site-packages/pandas/io/common.py", line 289, in urlopen
    return urllib.request.urlopen(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/urllib/request.py", line 215, in urlopen
    return opener.open(url, data, timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/urllib/request.py", line 515, in open
    response = self._open(req, data)
               ^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/urllib/request.py", line 532, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/urllib/request.py", line 492, in _call_chain
    result = func(*args)
             ^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/urllib/request.py", line 1392, in https_open
    return self.do_open(http.client.HTTPSConnection, req,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/urllib/request.py", line 1347, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1000)>
>>> data = data.fetch()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'data' is not defined

System details.

MacBook Pro 14"
Nov 2023
MacOS 14.4

Meteostat was installed with pip3 install meteostat in the local venv.

[adamhsparks]

This one's on me as a newbie with Python.

If anyone else has this issue, I just had to run the /Applications/Python 3.12/Install Certificates.command and all is good.

Apologies! I'm learning here. 😃