对于instance Alternative [],(<|>) = (++)。因此,我认为(<|>)是一种拼接器,导致了看似几乎通用的容器转换器:
-- (<|>) = generalization of (++)
(<|) :: Alternative f => x -> f x -> f x
x <| xs = pure x <|> xs
conv :: (Foldable t, Alternative f) => t x -> f x
conv = foldr (<|) empty
实际上
我试图在每对物品之间找到相似之处。条目在python字典中,我发现相似度一次取对。密码是-
def allSimilarity(itemsDict, similarityMetric):
itemList = itemsDict.keys()
itemSimilarityDict = {}
for item1 in itemList:
itemSimilarityDict[item1] = {}
for item2 in itemList:
if(item1 == item2):
c
I implemented a FTP Server in Python using pyftpdlib.ftpserver
This works fine with mput/put operations but fails with mget/get. Following exception is thrown:
[]10.203.200.136:62408连通。10.203.200.136:62408 ==> 220 pyftpdlib 0.5.2就绪。10.203.200.136:62408 <==用户10.203.200.136:62408 ==> 331用户名确