Python如何实现重复执行特定代码块？

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使用`pip install retry`来自动重试安装，最多尝试5次，每次间隔2秒。以下是一个简化后的代码示例：

pythonfrom retry import retry

@retry(tries=5, delay=2)def test(): print(1) a=5 / 0 test()

def retry(func, exceptions=Exception, tries=-1, delay=0, max_delay=None, backoff=1, jitter=0, logger=None): def wrapper(*args, **kwargs): attempt=1 while True: try: return func(*args, **kwargs) except exceptions as e: if max_delay is not None and delay > max_delay: raise if tries is not -1 and attempt >=tries: raise if logger: logger.warning(fAttempt {attempt} failed: {e}) time.sleep(delay + attempt * backoff + jitter * (2 * random.random() - 1)) attempt +=1 return wrapper

pip install retry

自动尝试5次，每次间隔2秒

from retry import retry

@retry(tries=5, delay=2)
def test():
print 1
a = 5/0

test()

def retry(exceptions=Exception, tries=-1, delay=0, max_delay=None, backoff=1, jitter=0, logger=logging_logger):
"""Return a retry decorator.

:param exceptions: an exception or a tuple of exceptions to catch. default: Exception.
:param tries: the maximum number of attempts. default: -1 (infinite).
:param delay: initial delay between attempts. default: 0.
:param max_delay: the maximum value of delay. default: None (no limit).
:param backoff: multiplier applied to delay between attempts. default: 1 (no backoff).
:param jitter: extra seconds added to delay between attempts. default: 0.
fixed if a number, random if a range tuple (min, max)
:param logger: logger.warning(fmt, error, delay) will be called on failed attempts.
default: retry.logging_logger. if None, logging is disabled.
"""

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