block_printing.py

import os
import sys

def block_printing(func):
    def func_wrapper(*args, **kwargs):
        # Block all printing to the console
        sys.stdout = open(os.devnull, 'w')
        sys.stderr = open(os.devnull, 'w')

        # Function call
        value = func(*args, **kwargs)
        
        # Enable all printing to the console
        sys.stdout = sys.__stdout__
        sys.stderr = sys.__stderr__
        
        return value
    return func_wrapper

Usage

@block_printing
def foo(a):
    print(a)