PATH:
opt
/
bitninja-python-dojo
/
embedded
/
lib
/
python3.9
/
ctypes
/
test
r''' This tests the '_objects' attribute of ctypes instances. '_objects' holds references to objects that must be kept alive as long as the ctypes instance, to make sure that the memory buffer is valid. WARNING: The '_objects' attribute is exposed ONLY for debugging ctypes itself, it MUST NEVER BE MODIFIED! '_objects' is initialized to a dictionary on first use, before that it is None. Here is an array of string pointers: >>> from ctypes import * >>> array = (c_char_p * 5)() >>> print(array._objects) None >>> The memory block stores pointers to strings, and the strings itself assigned from Python must be kept. >>> array[4] = b'foo bar' >>> array._objects {'4': b'foo bar'} >>> array[4] b'foo bar' >>> It gets more complicated when the ctypes instance itself is contained in a 'base' object. >>> class X(Structure): ... _fields_ = [("x", c_int), ("y", c_int), ("array", c_char_p * 5)] ... >>> x = X() >>> print(x._objects) None >>> The'array' attribute of the 'x' object shares part of the memory buffer of 'x' ('_b_base_' is either None, or the root object owning the memory block): >>> print(x.array._b_base_) # doctest: +ELLIPSIS <ctypes.test.test_objects.X object at 0x...> >>> >>> x.array[0] = b'spam spam spam' >>> x._objects {'0:2': b'spam spam spam'} >>> x.array._b_base_._objects {'0:2': b'spam spam spam'} >>> ''' import unittest, doctest import ctypes.test.test_objects class TestCase(unittest.TestCase): def test(self): failures, tests = doctest.testmod(ctypes.test.test_objects) self.assertFalse(failures, 'doctests failed, see output above') if __name__ == '__main__': doctest.testmod(ctypes.test.test_objects)
[-] test_win32.py
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[-] test_bitfields.py
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[-] test_libc.py
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[-] test_array_in_pointer.py
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[-] test_varsize_struct.py
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[-] test_arrays.py
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[-] test_random_things.py
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[-] test_callbacks.py
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[-] test_init.py
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[-] test_numbers.py
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[-] test_stringptr.py
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[-] test_sizes.py
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[-] test_internals.py
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[+]
..
[-] test_errno.py
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[-] test_wintypes.py
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[-] test_struct_fields.py
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[-] test_unicode.py
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[-] test_checkretval.py
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[-] test_bytes.py
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[-] test_returnfuncptrs.py
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[-] test_python_api.py
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[-] test_parameters.py
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[-] __main__.py
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[-] test_strings.py
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[-] test_values.py
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[-] test_pointers.py
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[-] test_repr.py
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[-] test_delattr.py
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[-] test_pep3118.py
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[-] test_buffers.py
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[-] test_objects.py
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[+]
__pycache__
[-] test_cast.py
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[-] test_prototypes.py
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[-] test_keeprefs.py
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[-] test_incomplete.py
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[-] test_slicing.py
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[-] test_cfuncs.py
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[-] test_structures.py
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[-] test_funcptr.py
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[-] test_refcounts.py
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[-] test_byteswap.py
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[-] test_unaligned_structures.py
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[-] test_loading.py
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[-] test_frombuffer.py
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[-] test_anon.py
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[-] test_macholib.py
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[-] test_as_parameter.py
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[-] test_find.py
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[-] __init__.py
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[-] test_functions.py
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[-] test_pickling.py
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[-] test_memfunctions.py
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[-] test_simplesubclasses.py
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