cython

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from cython.cimports.libc.stdlib import free
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from cython.cimports.c_func import get_a_c_string
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def main():
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    c_string: cython.p_char = cython.NULL
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    length: cython.Py_ssize_t = 0
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    # get pointer and length from a C function
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    get_a_c_string(cython.address(c_string), cython.address(length))
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    try:
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        py_bytes_string = c_string[:length]  # Performs a copy of the data
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    finally:
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        free(c_string)
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