# function_pointers.py
# This is the Python equivalent to the function_pointers.c
# Python can pass around pointers to functions
def print_int(i):
    print(i)

def print_fancy( i ):
    print( "The int is", i );

# Pretend this does a whole lot more than call do_it.
def process_int( do_it, the_int_to_process ):
    do_it( the_int_to_process )
    print( "I have done it" )

def main():
	
	# The type of func is a pointer to a function and its value is 
	# the function print_int (note this doesn't execute print_it)
	func = print_int
	print( func )
	
	# call a function pointer
	func(10);
	
	# process_int can call any function expecting a single int!
	process_int( print_int, 20 )
	process_int( print_fancy, 20 )

if __name__ == '__main__':
    main()