Unified access of the relevant os.environ items

[wyli]

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MONAI/monai/utils/misc.py

Lines 512 to 514 in 9ae72e4

	class MONAIEnvVars:
	"""
	Environment variables used by MONAI.

monai.utils.MONAIEnvVars is created to consolidate the relevant system environment variables.

this is a feature request to refactor the existing direct os.environ[key] calls to use this class intead.

example

• MONAI/monai/apps/auto3dseg/bundle_gen.py

  Line 47 in 9ae72e4

  ALGO_HASH = os.environ.get("MONAI_ALGO_HASH", "e01d67a")

• MONAI/monai/transforms/inverse.py

  Line 73 in 9ae72e4

  tracing = os.environ.get("MONAI_TRACE_TRANSFORM", "1") != "0"

• MONAI/tests/test_transform.py

  Line 34 in 9ae72e4

  cls.orig_value = os.environ.get("MONAI_DEBUG")