human
I wrote the below code

    if (condition.dtype != tf.bool):
        condition = tf.cast(condition, 'bool')
    if (not callable(then_expression)):
        def then_expression_fn():
            return then_expression
    else:
        then_expression_fn = then_expression
    if (not callable(else_expression)):
        def else_expression_fn():
            return else_expression
    else:
        else_expression_fn = else_expression
    x = tf.cond(condition, then_expression_fn, else_expression_fn)
    return x

What's a good function header?
 Here's a good function header?
assistant
#Here's a good function header.

def switch(condition, then_expression, else_expression):