Optional version update check on library import

[lerignoux]

Feature description

Add an environment variable to disable the automatic library version check on import

Motivation and context

Following update check MR
Working in an offline environment, on library import the library works well and does skip the check but we keep getting an exception log and 2s additional timeout following the check version.
cf log

Error fetching version info
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/urllib/request.py", line 1348, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/usr/local/lib/python3.11/http/client.py", line 1303, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/local/lib/python3.11/http/client.py", line 1349, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/local/lib/python3.11/http/client.py", line 1298, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/local/lib/python3.11/http/client.py", line 1058, in _send_output
    self.send(msg)
  File "/usr/local/lib/python3.11/http/client.py", line 996, in send
    self.connect()
  File "/usr/local/lib/python3.11/http/client.py", line 1468, in connect
    super().connect()
  File "/usr/local/lib/python3.11/http/client.py", line 962, in connect
    self.sock = self._create_connection(
                ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/socket.py", line 827, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/socket.py", line 962, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
socket.gaierror: [Errno -3] Temporary failure in name resolution

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/albumentations/check_version.py", line 29, in fetch_version_info
    with opener.open(url, timeout=2) as response:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/urllib/request.py", line 519, in open
    response = self._open(req, data)
               ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/urllib/request.py", line 536, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/urllib/request.py", line 496, in _call_chain
    result = func(*args)
             ^^^^^^^^^^^
  File "/usr/local/lib/python3.11/urllib/request.py", line 1391, in https_open
    return self.do_open(http.client.HTTPSConnection, req,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/urllib/request.py", line 1351, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [Errno -3] Temporary failure in name resolution>

We would like to suggest an option to disable this check if needed.

Possible implementation

I proposed a possible resolution implementation and documentation in the following MR by relying on a environment variable:

• Code update
• Doc update

Alternatives

Another solution could be to remove the log.exception but could hinder debugging.

[ternaus]

Merged