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# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt

"""Determine facts about the environment."""

import os
import sys

# Operating systems.
WINDOWS = sys.platform == "win32"
LINUX = sys.platform == "linux2"

# Python implementations.
PYPY = '__pypy__' in sys.builtin_module_names

# Python versions.
PYVERSION = sys.version_info
PY2 = PYVERSION < (3, 0)
PY3 = PYVERSION >= (3, 0)

# Coverage.py specifics.

# Are we using the C-implemented trace function?
C_TRACER = os.getenv('COVERAGE_TEST_TRACER', 'c') == 'c'

# Are we coverage-measuring ourselves?
METACOV = os.getenv('COVERAGE_COVERAGE', '') != ''

# Are we running our test suite?
# Even when running tests, you can use COVERAGE_TESTING=0 to disable the
# test-specific behavior like contracts.
TESTING = os.getenv('COVERAGE_TESTING', '') == 'True'