circuitpython/tests/stress/gc_trace.py

# test that the GC can trace nested objects

try:
    import gc
except ImportError:
    print("SKIP")
    raise SystemExit

# test a big shallow object pointing to many unique objects
lst = [[i] for i in range(200)]
gc.collect()
print(lst)

# test a deep object
lst = [
    [[[[(i, j, k, l)] for i in range(3)] for j in range(3)] for k in range(3)] for l in range(3)
]
gc.collect()
print(lst)
tests/stress: Add test to verify the GC can trace nested objects. 2018-04-03 23:58:57 -04:00			`# test that the GC can trace nested objects`

			`try:`
			`import gc`
			`except ImportError:`
			`print("SKIP")`
			`raise SystemExit`

			`# test a big shallow object pointing to many unique objects`
			`lst = [[i] for i in range(200)]`
			`gc.collect()`
			`print(lst)`

			`# test a deep object`
tests: Format all Python code with black, except tests in basics subdir. This adds the Python files in the tests/ directory to be formatted with ./tools/codeformat.py. The basics/ subdirectory is excluded for now so we aren't changing too much at once. In a few places `# fmt: off`/`# fmt: on` was used where the code had special formatting for readability or where the test was actually testing the specific formatting. 2020-03-22 22:26:08 -04:00			`lst = [`
			`[[[[(i, j, k, l)] for i in range(3)] for j in range(3)] for k in range(3)] for l in range(3)`
			`]`
tests/stress: Add test to verify the GC can trace nested objects. 2018-04-03 23:58:57 -04:00			`gc.collect()`
			`print(lst)`