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from __future__ import annotations
import sys
import typing
from .imports import lazy_import
from .version import version as websockets_version
# For backwards compatibility:
# When type checking, import non-deprecated aliases eagerly. Else, import on demand.
if typing.TYPE_CHECKING:
from .datastructures import Headers, MultipleValuesError # noqa: F401
else:
lazy_import(
globals(),
# Headers and MultipleValuesError used to be defined in this module.
aliases={
"Headers": ".datastructures",
"MultipleValuesError": ".datastructures",
},
deprecated_aliases={
"read_request": ".legacy.http",
"read_response": ".legacy.http",
},
)
__all__ = ["USER_AGENT"]
PYTHON_VERSION = "{}.{}".format(*sys.version_info)
USER_AGENT = f"Python/{PYTHON_VERSION} websockets/{websockets_version}"
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