34 lines
776 B
Python
34 lines
776 B
Python
# test memoryview retains pointer to original object/buffer
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try:
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memoryview
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except:
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print("SKIP")
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raise SystemExit
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b = bytearray(10)
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m = memoryview(b)[1:]
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for i in range(len(m)):
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m[i] = i
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# reclaim b, but hopefully not the buffer
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b = None
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import gc
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gc.collect()
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# allocate lots of memory
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for i in range(100000):
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[42, 42, 42, 42]
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# check that the memoryview is still what we want
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print(list(m))
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# check that creating a memoryview of a memoryview retains the underlying data
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m = None
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gc.collect() # cleanup from previous test
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m = memoryview(memoryview(bytearray(i for i in range(50)))[5:-5])
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print(sum(m), list(m[:10]))
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gc.collect()
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for i in range(10):
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list(range(10)) # allocate memory to overwrite any reclaimed heap
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print(sum(m), list(m[:10]))
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