A simple decorator function that applies itself to all elements in a module. The example is modifying the math module to print a string for every function call.

Module_level_decorator.py

def module_wrapper(module): 
	def print_wrap(subfunc): 
		def internal_func(*args, **kwargs): 
			print("I'm going to run this function") 
			return subfunc(*args, **kwargs)
		return internal_func
	
	for func_name in dir(module):
		setattr(module, func_name, print_wrap(getattr(module, func_name)))
		
		
if __name__ == '__main__':
  print('demo:')
  import math
  module_wrapper(math)
  
  # both of these will print "I'm going to run this function"
  math.cos(0)
  math.sin(90)