我正在創(chuàng)建一個腳本，該腳本會定期為服務(wù)器抓取已添加的“新”文件。為此，我希望將上次腳本執(zhí)行的日期時間存儲在一個文件中，以便腳本可以處理自該日期時間以來的“所有新文件”。最終目標(biāo)是通過 Windows 任務(wù)計劃程序定期運(yùn)行此腳本。我可以使用下面的代碼來做這個的基本版本。但是，我希望有一種更簡潔、更短或更健壯的方法來實現(xiàn)這一目標(biāo)。歡迎任何建議！import datetimefmt = "%Y-%m-%d %H:%M:%S"last_run = ""# try loading the datetime of the last run, else print warningtry: with open("last_run.txt", mode="r") as file: last_run = datetime.datetime.strptime(file.read(), fmt) print(last_run)except: print("no file available")# ... run script code using the last_run variable as input ...# update the script execution time and save it to the filewith open("last_run.txt", mode="w") as file: file.write(datetime.datetime.now().strftime(fmt))
1 回答
呼啦一陣風(fēng)
TA貢獻(xiàn)1802條經(jīng)驗 獲得超6個贊
您的解決方案看起來不錯。
我唯一想建議的是在兩個單獨的函數(shù)中取出讀取和寫入上次運(yùn)行時間戳邏輯，并將這兩個函數(shù)移動到一個單獨的模塊文件中。這與上述回復(fù)中@Tomalak 的建議相同。下面是代碼示例。
模塊文件：last_run.py
import datetime
fmt = "%Y-%m-%d %H:%M:%S"
def get_last_run_time_stamp():
"""
Get last run time stamp\n
====\n
When this function called\n
AND last_run.txt file is present\n
Then open the file and read the time-stamp stored in it\n
====\n
When this function is called\n
AND last_run.txt file is not present\n
Then print the following message on console: "last_run.txt file is not available"\n
"""
# try loading the datetime of the last run, else print warning
try:
with open("last_run.txt", mode="r") as file:
return datetime.datetime.strptime(file.read(), fmt)
except:
# Return with current time-stamp if last_run.txt file is not present
return datetime.datetime.now().strftime(fmt)
# ... run script code using the last_run variable as input ...
def save_last_run_time_stamp():
"""
Save last run time stamp\n
====\n
When this function called\n
AND last_run.txt file is present\n
Then Open the file, save it with current time stamp and close the file\n
====\n
When this function called\n
AND last_run.txt file is not present\n
Then Create the file, open the file, save it with current time stamp and close the file\n
"""
# update the script execution time and save it to the file
with open("last_run.txt", mode="w") as file:
current_timestamp = datetime.datetime.now().strftime(fmt);
file.write(current_timestamp)
然后，下面是 schedular 配置和運(yùn)行的文件：
run_latest_scaped_files.py,
import last_run as lr
last_run = lr.get_last_run_time_stamp()
print(last_run)
# ... run script code using the last_run variable as input ...
lr.save_last_run_time_stamp()
就是這樣?。?！
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