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Lazy imports according to PEP-562 #83

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Lazy imports according to PEP-562 #83

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31 changes: 13 additions & 18 deletions src/forge/actors/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,25 +4,20 @@
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.

__all__ = ["Policy", "PolicyRouter", "RLTrainer", "ReplayBuffer"]

import importlib

def __getattr__(name):
if name == "Policy":
from .policy import Policy

return Policy
elif name == "PolicyRouter":
from .policy import PolicyRouter
__all__ = [
"Policy",
"SamplingOverrides",
"WorkerConfig",
"PolicyConfig",
"ReplayBuffer",
"RLTrainer",
]

return PolicyRouter
elif name == "RLTrainer":
from .trainer import RLTrainer

return RLTrainer
elif name == "ReplayBuffer":
from .replay_buffer import ReplayBuffer

return ReplayBuffer
else:
raise AttributeError(f"module {__name__} has no attribute {name}")
def __getattr__(name):
if name in __all__:
return importlib.import_module("." + name, __name__)
raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
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