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from vega_datasets.core import Dataset
from vega_datasets._compat import urlopen, HTTPError, URLError
def connection_ok():
"""Check web connection.
Returns True if web connection is OK, False otherwise.
"""
try:
urlopen(Dataset.base_url, timeout=1)
# if an index page is ever added, this will pass through
return True
except HTTPError:
# There's no index for BASE_URL so Error 404 is expected
return True
except URLError:
# This is raised if there is no internet connection
return False
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