Please specify (single) host string for connection:

No hosts found. Please specify (single) host string for connection:

在apscheduler中執行fabric的定時任務時：
正常的寫法是這樣的
scheduler.add_job(updataPicture.gettime, 'cron', day_of_week='0-6', hour=18, minute=15)
可是在時間到達的時候執行結果是這樣的：
No hosts found. Please specify (single) host string for connection:
結果會讓我從新輸入主機名

通過查詢在Stack Overflow上找了答案：

In order to get hosts to work in a script outside of the fab command-line tool and fabfile.py, you'll have to use execute():

from fabric.tasks import execute   
def mytask():   
    run('uname -a') 

results = execute(mytask)

這樣的話主機就能夠工做在腳本之外了，我在原有fabric文件中執行

def getlatestpics():
    execute(updatapic)

而後定時任務這樣：

scheduler.add_job(updataPicture.getlatestpics, 'cron', day_of_week='0-6', hour=18, minute=15)

這樣就能夠很是完美的執行了