Python3中的条件合并

Question

我想将变量合并到字典中存在的键中。 下面是规则：

1. 如果键已经存在，然后增加一个计数器的值。
2. 如果与密钥部分匹配存在： a。如果可变长度小于键，但re.search不是无，则将值计数器增加一个 b。如果可变长度大于键和re.search较大不无，一个
3. 如果后此变量存在，但仍然在字典中没有匹配替代由变量，增量计数键，添加变量字典

我已经能够完成1,2a和2b，但我不知道如何添加3.任何帮助/建议将不胜感激。 以下是目前形式的脚本：我还想在字典中看到“乌龟”。

Animals = ["phant", "eleph", "tiger", "turtle", "zebra", "ostrich"] 
Dict = {"horse":1, "elephant":1, "iger":1, "ostrich":1} 

for name in Animals: 
    if name in Dict: 
      Dict[name]=Dict[name]+1 
    else: 
      for key, val in Dict.items(): 
        if len(name) < len(key): 
          m = re.search (name, key) 
          if m != None: 
            print ("Found match!", name) 
            Dict[key] = Dict[key] + 1 
            break 
        elif len(name) > len(key): 
           m = re.search (key, name) 
           if m != None: 
            print ("Found match!", name) 
            Dict[name] = Dict.pop(key) + 1 
            Dict[name] = Dict[name] + 1 
            break 

Answer 1

一种方式来描述情况＃3看代码后是“如果既没有break语句被处死”。您可以通过在for循环之后放置else语句来处理此情况。如果for循环运行完成该块内的代码才会执行​​（或者换句话说，没有break语句循环中运行）：

Animals = ["phant", "eleph", "tiger", "turtle", "zebra", "ostrich"] 
Dict = {"horse":1, "elephant":1, "iger":1, "ostrich":1} 

for name in Animals: 
    if name in Dict: 
     Dict[name]=Dict[name]+1 
    else: 
     for key, val in Dict.items(): 
      if len(name) < len(key): 
       m = re.search (name, key) 
       if m != None: 
        print ("Found match!", name) 
        Dict[key] = Dict[key] + 1 
        break 
      elif len(name) > len(key): 
       m = re.search (key, name) 
       if m != None: 
        print ("Found match!", name) 
        Dict[name] = Dict.pop(key) + 1 
        Dict[name] = Dict[name] + 1 
        break 
     else:     # this line and the one below it are new 
      Dict[name] = 1 

Answer 2

for name in Animals: 
    if name in Dict: 
     Dict[name]=Dict[name]+1 
    else: 
     found= False 
     for key, val in Dict.items(): 
      if len(name) < len(key): 
       m = re.search (name, key) 
       if m != None: 
        print ("Found match!", name) 
        Dict[key] = Dict[key] + 1 
        found= True 
        break 
      elif len(name) > len(key): 
       m = re.search (key, name) 
       if m != None: 
        print ("Found match!", name) 
        Dict[name] = Dict.pop(key) + 1 
        found= True 
        break 
     if not found 
      Dict[name] = 1 

我宁愿以下，但：

for name in Animals: 
    if name in Dict: 
     Dict[name]=Dict[name]+1 
    else: 
     found= False 
     for key, val in Dict.items(): 
      m = re.search (name, key) 
      if m != None: 
       print ("Found match!", name) 
       if len(name) < len(key): 
        Dict[key] = Dict[key] + 1 
       else 
        Dict[name] = Dict.pop(key) + 1 
       found= True 
       break 
     if not found 
      Dict[name] = 1