为什么意外缩进？

这是为什么发生？为什么意外缩进？

def LoadPackageList(): 
    try: 
     #Attempts to load package list... Adds each neccessary attribute into array 
     print("Loading Package List... please wait") 
     packages = [] 
     packagelisturl = os.getcwd() + "packages.list" 
     dom = minidom.parse(urllib.urlopen(packagelisturl)) 
     try: 
      for eachattributeofpkglist in dom.GetElementsByTagNameNS(packagelist, 'packages'): 
       packages.append({ 
        'title': node.getAttribute('title'), 
        'shortname': node.getAttribute('shortname'), 
        'dlurl': node.getAttributes('dlurl'), 
        'description': node.getAttributes('description'), 
        'tags': node.getAttributes('tags'), 
        'infopage': node.getAttributes('infopage'), 
        'quality': node.getAttributes('quality'), 
        'id': node.getAttributes('id') 
      }) 

     except LoadPackageListFailed: 
      print("Loading Package List failed... try again soon or manually update this release!") 
      Write2ErrorLog(LoadPackageListFailed) 
#Indent Here Fails    
def Usage(): 
#prints usage and closes 
    print ("Invalid Argument Specified, please retry using the format stated below\n") 
    print ("*** Simtho Usage Parameters ***\n") 
    print ("-i Installs Local App, include full path") 
    print ("-u Uninstalls Installed App,include ID or Name") 
    print ("-l Lists all installed Apps and their ID") 
    print ("-a Lists All Apps in Repository") 
    print ("-s Downloads and Installs App from repository, enter the title or id number") 
    print ("-w Downloads and Installs Single App from a full link") 
    print ("-r Removes All Packages installed\n") 
    print ("*** End of Simtho Usage ***") 
    os._exit(1) 
    return;

来源

2009-12-31 Display Name

缩进的位置究竟是什么？你能展示实际的产出和你的期望吗？ – Rory

尝试通过显示空白的东西运行它。在* nix机器上，使用'od -c yourfile.py'来查看字符。这可能是有用的，虽然可能有更好的方法来做到这一点。 – Ibrahim

如果您还没有弄清楚，请复制上面的代码并粘贴到您自己的代码上面，它应该可以解决问题。如果没有，问题不在上面的代码中，而是在相邻的地方，正如〜unutbu建议的那样。 –