Human: gradient of the l2 norm in 2D. Assistant: 
Here is a Python code to gradient the l2 norm in 2d

import numpy as np

def _gradient_l2_norm(x, y):
    """
    Returns the gradient of the l2 norm in 2D.
    """
    return (2 * x, 2 * y)

# Enter the values
x = 1
y = 2

# Calling the function
print((_gradient_l2_norm(x, y)))

#Example Output
# (2, 4)

#Remember to inspect code for bugs.