Using the Python print Function in a Loop

Symptom

@pypto.frontend.jit
def add_kernel_0(a, b, c):
    for i in pypto.loop(20):
        print("i = ", i)
        c[:] = a + b
>>>
i = 0

@pypto.frontend.jit
def add_kernel_1(a, b, c):
    for i in pypto.loop(20):
        print("i = ", i)
        if pypto.cond(i == 0):
            c[:] = a + b
        else:
            c[:] = a - b
>>>
i = 0
i = 1

Possible Causes

The user operator describes the graph construction process rather than the actual execution logic. During the graph construction phase, loop execution is used only to traverse all execution paths.

The sample code add_kernel_0 contains only one execution path, so the loop executes only once.
In add_kernel_1, there are two paths (if/else), so the loop executes twice.

Solution

N/A