Package: tinyretry
Tiny RetryWhat is TinyRetry?tinyretry is a python module that provides failure retry encapsulation for the target functionProgramming Languagepython 2.7python 3.7Installpip install tinyretryQuick Startuse python decorators syntax to wrap the call targetCase 1: retry until the return code equals to the special valueWhen we call the function and hope to get the special return code, then we can useRetryUntilForJsonorRetryUntilForBoolfrom tinyretry import RetryUntilForJson

@RetryUntilForJson(retry_code_key='errno', expected_err_code=0, max_retry_num = 10, retry_interval_sec = 0.1)
def DoHttpRequest1():
    errno = random.randint(0,2)
    errmsg_arr = ['ok', 'err-timeout', 'err-req-limit']
    return {
        "errno": errno,
        "errmsg": errmsg_arr[errno]
    }

class Test_TinyRetry(unittest.TestCase):
    def test_RetryUntilForJson(self):
        for i in range(5):
            res = DoHttpRequest1()
            self.assertEqual(res["errno"], 0)Then you can get the return value from the functionDoHttpRequest1()which must be successful, the call log like this:bogon:tinyretry jamesqin$ python tinyretry_test.py
2020-02-14 14:03:14,754 - root - INFO - call RetryUntilForJson(DoHttpRequest)(...)
2020-02-14 14:03:14,754 - root - INFO -     Get expected error code 0
2020-02-14 14:03:14,754 - root - INFO - call RetryUntilForJson(DoHttpRequest)(...)
2020-02-14 14:03:14,754 - root - INFO -     Error code 2 was found, retry 1
2020-02-14 14:03:14,859 - root - INFO -     Get expected error code 0
2020-02-14 14:03:14,860 - root - INFO - call RetryUntilForJson(DoHttpRequest)(...)
2020-02-14 14:03:14,860 - root - INFO -     Error code 1 was found, retry 1
2020-02-14 14:03:14,964 - root - INFO -     Error code 1 was found, retry 2
2020-02-14 14:03:15,070 - root - INFO -     Error code 1 was found, retry 3
2020-02-14 14:03:15,172 - root - INFO -     Error code 2 was found, retry 4
2020-02-14 14:03:15,278 - root - INFO -     Get expected error code 0
2020-02-14 14:03:15,278 - root - INFO - call RetryUntilForJson(DoHttpRequest)(...)
2020-02-14 14:03:15,278 - root - INFO -     Error code 2 was found, retry 1
2020-02-14 14:03:15,381 - root - INFO -     Error code 1 was found, retry 2
2020-02-14 14:03:15,482 - root - INFO -     Error code 1 was found, retry 3
2020-02-14 14:03:15,586 - root - INFO -     Error code 1 was found, retry 4
2020-02-14 14:03:15,692 - root - INFO -     Error code 2 was found, retry 5
2020-02-14 14:03:15,794 - root - INFO -     Get expected error code 0
2020-02-14 14:03:15,794 - root - INFO - call RetryUntilForJson(DoHttpRequest)(...)
2020-02-14 14:03:15,794 - root - INFO -     Get expected error code 0
.
----------------------------------------------------------------------
Ran 1 test in 1.040s

OKCase 2: while the return code equals to the special value, we will retryWhen we call the function and hope to skip the special return code, then we can useRetryWhileForJsonorRetryWhileForBoolfrom tinyretry import RetryWhileForJson

@RetryWhileForJson(retry_code_key='errno', not_expected_err_code=2, max_retry_num = 10, retry_interval_sec = 0.1)
def DoHttpRequest2():
    errno = random.randint(0,2)
    errmsg_arr = ['ok', 'err-timeout', 'err-req-limit']
    return {
        "errno": errno,
        "errmsg": errmsg_arr[errno]
    }

class Test_TinyRetry(unittest.TestCase):
    def test_RetryWhileForJson(self):
        for i in range(5):
            res = DoHttpRequest2()
            self.assertNotEqual(res["errno"], 2)then call log look like this:2020-02-14 14:13:30,708 - root - INFO - call RetryWhileForJson(DoHttpRequest2)(...)
2020-02-14 14:13:30,708 - root - INFO -     Error code 2 was found, retry 1
2020-02-14 14:13:30,810 - root - INFO -     Error code 2 was found, retry 2
2020-02-14 14:13:30,912 - root - INFO -     Error code 2 was found, retry 3
2020-02-14 14:13:31,013 - root - INFO -     Error code 2 was found, retry 4
2020-02-14 14:13:31,117 - root - INFO -     Error code 2 was found, retry 5
2020-02-14 14:13:31,222 - root - INFO -     Get not expected error code 1
2020-02-14 14:13:31,222 - root - INFO - call RetryWhileForJson(DoHttpRequest2)(...)
2020-02-14 14:13:31,222 - root - INFO -     Get not expected error code 0
2020-02-14 14:13:31,222 - root - INFO - call RetryWhileForJson(DoHttpRequest2)(...)
2020-02-14 14:13:31,222 - root - INFO -     Error code 2 was found, retry 1
2020-02-14 14:13:31,324 - root - INFO -     Get not expected error code 0
2020-02-14 14:13:31,324 - root - INFO - call RetryWhileForJson(DoHttpRequest2)(...)
2020-02-14 14:13:31,324 - root - INFO -     Error code 2 was found, retry 1
2020-02-14 14:13:31,426 - root - INFO -     Error code 2 was found, retry 2
2020-02-14 14:13:31,529 - root - INFO -     Get not expected error code 1
2020-02-14 14:13:31,529 - root - INFO - call RetryWhileForJson(DoHttpRequest2)(...)
2020-02-14 14:13:31,529 - root - INFO -     Get not expected error code 1Other useful retry functions:This package provide two scenarios of failure retriesUntil sceneRetryUntilForJson()RetryUntilForBool()while sceneRetryWhileForJson()RetryWhileForBool()