的Python有條件

Question

無效語法我有這樣的Python代碼在這裏：

def location(location_id, max_id=None): 
     # Send http request to find location 
     if (self.login_status): 
      get_location = {'location_id': location_id} 
      url_location_detail = self.url_location_detail % (location_id) 
     try: 
      get_location_id = self.i.get(url_location_detail, data=body) 
      if location.status_code == 200: 
       log_string = "Get location id: %d" % (location_id) 
       self.write_log(log_string) 

     if max_id is not None: payload['max_id'] = max_id 
      try: 
       res = requests.get(url, params=payload).json() 
       body = res['location'] 
       cursor = res['location']['media']['page_info']['end_cursor'] 
      except: raise 
      return InstagramExploreResponse(data=body, cursor=cursor) 

當我運行程序，它會引發以下錯誤：

SyntaxError: invalid syntax 

的錯誤似乎在線路447現身這是以下內容：

if max_id is not None: payload['max_id'] = max_id 

奇怪的是，代碼工作之前，我在這行之前添加了一些代碼，所以我認爲這個錯誤來自上一行。

不幸的是，我看不到它。

謝謝！

Answer 1

你可以找到你所需要的是什麼：Putting a simple if-then statement on one line

他們已經解釋了爲什麼這個錯誤顯示和一些方法來解決這個問題

作爲更加清晰這裏，你不能把什麼內側if在Python中的if前面。這：

if max_id is not None: payload['max_id'] = max_id 

成爲這樣的：

if max_id is not None: 
    payload['max_id'] = max_id