問題描述

我對 python 很陌生.我試圖在類中將值從一種方法傳遞給另一種方法.我搜索了這個問題，但我無法得到正確的解決方案.因為在我的代碼中，if"正在調用類的方法on_any_event"，作為回報應該調用我的另一個方法dropbox_fn"，該方法利用on_any_event"中的值.如果dropbox_fn"方法在類外，它會起作用嗎?

I am very new to python. I was trying to pass value from one method to another within the class. I searched about the issue but i could not get proper solution. Because in my code, "if" is calling class's method "on_any_event" that in return should call my another method "dropbox_fn", which make use of the value from "on_any_event". Will it work, if the "dropbox_fn" method is outside the class?

我會用代碼來說明.

class MyHandler(FileSystemEventHandler):
 def on_any_event(self, event):
    srcpath=event.src_path
    print (srcpath, 'has been ',event.event_type)
    print (datetime.datetime.now())
    #print srcpath.split(' ', 12 );
    filename=srcpath[12:]
    return filename # I tried to call the method. showed error like not callable 

 def dropbox_fn(self)# Or will it work if this methos is outside the class ?
    #this method uses "filename"

if __name__ == "__main__":
  path = sys.argv[1] if len(sys.argv) > 1 else '.'
  print ("entry")
  event_handler = MyHandler()
  observer = Observer()
  observer.schedule(event_handler, path, recursive=True)
  observer.start()
  try:
     while True:
         time.sleep(1)
  except KeyboardInterrupt:
    observer.stop()
  observer.join()

這里的主要問題是.. 我不能在沒有事件參數的情況下調用on_any_event"方法.因此，與其返回值，不如在on_any_event"中調用dropbox_fn"是一種更好的方法.有人可以幫忙嗎?

The main issue in here is.. I cannot call "on_any_event" method without event parameter. So rather than returning value, calling "dropbox_fn" inside "on_any_event" would be a better way. Can someone help with this?

推薦答案

要調用該方法，您需要使用 self. 限定函數.除此之外，如果要傳遞文件名，請添加 filename 參數(或您想要的其他名稱).

To call the method, you need to qualify function with self.. In addition to that, if you want to pass a filename, add a filename parameter (or other name you want).

class MyHandler(FileSystemEventHandler):

    def on_any_event(self, event):
        srcpath = event.src_path
        print (srcpath, 'has been ',event.event_type)
        print (datetime.datetime.now())
        filename = srcpath[12:]
        self.dropbox_fn(filename) # <----

    def dropbox_fn(self, filename):  # <-----
        print('In dropbox_fn:', filename)

這篇關于在 Python 中從同一類中的另一個調用一個方法的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！