[Dy2static-Fallback] add set_eval_frame function in pybind.

[2742195759]

PR types

New features

PR changes

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Description

PCard-66972

add set_eval_frame function in pybind.

import paddle
import collections
import dis

CustomCode = collections.namedtuple("CustomCode", ["code"])

def mul(a, b):
    return a * b

print(dis.dis(mul))
code = CustomCode(mul.__code__)

def callback(frame_obj):
    # Do your callback function here and return a object with `.code`
    if frame_obj.f_code.co_name == "add":
        return code
    return my_code(code=frame_obj.f_code)   # do nothing.

def add(a, b):
    return a + b 

x = 1
y = 2

paddle.fluid.core.set_eval_frame(callback)
assert add (x, y) == 2, "should be 2"
paddle.fluid.core.set_eval_frame(None)
assert add (x, y) == 3, "should be 3"

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[paddle-ci-bot]

Sorry to inform you that affdb4a's CIs have passed for more than 7 days. To prevent PR conflicts, you need to re-run all CIs manually.

[Aurelius84]

LGTM for overall

[Aurelius84]

LGTM for overall