int myFunction(int num)
{
    if (num == 0)

        // if number is 0, do not perform any operation.
        return 0;
    else
        // if number is power of 2, return 1 else return 0

    num & (num - 1) == 0 ? return 1 : return 0
}

cc -fPIC -shared -o dicmodule.so library.c

import ctypes
NUM = 16
# dicmodule loaded to the python file
# using fun.myFunction(),
# C function can be accessed
# but type of argument is the problem.

fun = ctype.CDLL(dicmodule.so)
# Now whenever argument
# will be passed to the function
# ctypes will check it.

fun.myFunction.argtypes(ctypes.c_int)

# now we can call this
# function using instant (fun)
# returnValue is the value
# return by function written in C
# code
returnVale = fun.myFunction(NUM)