![](/img/trans.png)
[英]Python SyntaxError: invalid syntax when implementing bbcodepy
[英]Invalid Argument when implementing sched
我已經圍繞sched.scheduler
編寫了一個基本的包裝器,但是我得到了:
File "/usr/local/anaconda3/lib/python3.7/sched.py", line 149, in run
delayfunc(time - now)
OSError: [Errno 22] Invalid argument
這個錯誤的原因是什么? 我正在關注https://docs.python.org/3/library/sched.html
代碼:
#!/usr/local/anaconda3/bin/python
from time import time, sleep
from datetime import datetime, timezone
from sched import scheduler
class Scheduler:
# specify one or t'other e.g. "2021-03-17 02:29:00"
def __init__(self, event_time_utc:str='', local_unix_timestamp_override:float=0):
self.event_local_timestamp = Scheduler.to_local_unix_timestamp(event_time_utc) \
if event_time_utc else local_unix_timestamp_override
# self.seconds_until_event = event_local_timestamp - time()
print(self.event_local_timestamp - time())
self.sch = scheduler()
def run(self, blocking=False):
self.sch.run(blocking)
@staticmethod
def to_local_unix_timestamp(time_utc: str):
dt_utc = datetime.strptime(time_utc, "%Y-%m-%d %H:%M:%S")
dt_local = dt_utc.replace(tzinfo=timezone.utc)
return dt_local.timestamp()
@staticmethod
def to_human_readable(unix_timestamp):
return datetime.fromtimestamp(unix_timestamp).strftime('%Y-%m-%d %H:%M:%S.%f')
def schedule(self, offset_from_event_time_s:float, callback):
print('Event scheduled for local unix timestamp:', self.event_local_timestamp + offset_from_event_time_s)
self.sch.enterabs(
time = self.event_local_timestamp + offset_from_event_time_s,
priority = 1,
action = callback
)
if __name__ == '__main__':
sch = Scheduler(local_unix_timestamp_override=time()+5)
print(f'Started at time: {Scheduler.to_human_readable(time())}')
def callback():
print(f'Callback at time: {Scheduler.to_human_readable(time())}')
sch.schedule(offset_from_event_time_s=1, callback=callback)
sch.run(blocking=True)
Output:
> ./scheduler.py
4.999997854232788
Started at time: 2021-03-17 11:00:03.424191
f 1615953609.424139
Traceback (most recent call last):
File "./scheduler.py", line 55, in <module>
sch.run(blocking=True)
File "./scheduler.py", line 20, in run
self.sch.run(blocking)
File "/usr/local/anaconda3/lib/python3.7/sched.py", line 149, in run
delayfunc(time - now)
OSError: [Errno 22] Invalid argument
問題的根源是您假設sched
模塊正在使用 time.time() 作為其計時 function。 這是一個錯誤的假設。 它默認使用 time.monotonic() ,它返回自程序啟動以來的時間。 這將是一個很小的數字,例如 6。當您嘗試延遲到 1615644884.1231558 時,這會讓 go 變得瘋狂。
改變這個:
self.sch = scheduler()
對此:
self.sch = scheduler(time)
我嘗試調試該問題,發現 time.sleep() 中允許的浮點值的最大長度為 8(我找不到任何資源說明為什么只有 8),但由於您使用的是時間戳,因此該值超過了該值。 您可以在您的機器上嘗試以下代碼並檢查:
import time
# Will work fine
time.sleep(16156448)
# Will result in error
time.sleep(1615644884.1231558)
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.