Human: how to ensure function return type. Assistant: 
Here is a Python program to ensure return type

import numpy as np

def ensure_return_type(function, return_type):
    """
    Ensure that the function return type is return_type
    """
    def wrapper(*args, **kwargs):
        return function(*args, **kwargs)
    return wrapper

# Enter the function

def my_function(x):
    return x + 1

# Enter the return type
return_type = np.int32

# Calling the function
print((ensure_return_type(my_function, return_type)(1)))

#Example Output
# 2

#Remember to inspect code for bugs.