我得到在一個「如果」語句syntaxt錯誤，而在pythoneverywhere.com

Question

這裏運行我的瓶的應用程序的代碼：

import datetime 

from flask import Flask, request, abort, Blueprint 

import settings 

app = Flask(__name__) 

class AppServer: 
    """Initialise the web app""" 

    def __init__(self): 
     """Dynamically create and register uri handlers from the list of 
     modules specified in settings.py""" 
     handlers = [] 

     # register url handlers 
     for mod in settings.MODULES: 
      self.register_module(mod) 


    def register_module(self, module): 
     """Dynamically load and register module from ./modules""" 
     try: 

      name = "modules." + module 

      # import the module 
      mod = __import__(name) 
      components = name.split('.') 
      for comp in components[1:]: 
       mod = getattr(mod, comp) 

      mod = getattr(mod, settings.MODULES[module]['class']) 

      # create and register the blueprint 
      blueprint = Blueprint(module, name + "." + settings.MODULES[module]['class'], 
            template_folder="modules/" + module + "/templates") 

      blueprint.add_url_rule(settings.MODULES[module]["uri"], view_func=mod.as_view(module), methods=mod.methods) 
      app.register_blueprint(blueprint) 

     except Exception as e: 
      print ("Failed to load class " + settings.MODULES[module]['class'] + " for module " + module) 
      raise 


@app.context_processor 
def inject_year(): 
    return dict(year=datetime.datetime.now().year) 

@app.route("/") 
if __name__ == "__main__": 
    server = AppServer() 
    app.run() 

我在嘗試對https://www.pythonanywhere.com/ 運行它時，下面的錯誤而我正在失去理智。

2013-09-25 11:22:58,675 : File "/home/username/mysite/app.py", line 65 
2013-09-25 11:22:58,675 : if __name__ == "__main__": 
2013-09-25 11:22:58,675 : ^
2013-09-25 11:22:58,675 :SyntaxError: invalid syntax 

Answer 1

Python正在告訴你，你不能將裝飾器應用於if語句。裝飾器是可調用的（函數，類等）

此外PythonAnywhere使用WSGI的Web應用程序，所以你的if語句將永遠不會被輸入。

在我看來，似乎AppServer類只是在應用程序啓動時才設置一些配置。所以你必須在if語句之外這麼做。