Python模塊生成字符串中可能的字符串替換的所有排列？

template = "{{ person }} is a {{ quality }} {{ occupation }}" 
replacements = { 
"person":["John","Matt","Steve"], 
"quality":["great","dedicated"], 
"occupation":["engineer","student","athelete"] 
} 

Output: 
John is a great engineer 
Matt is a great engineer 
Steve is a great engineer 
John is a dedicated engineer 
Matt is a dedicated engineer 
Steve is a dedicated engineer 
John is a great student 
Matt is a great student 
Steve is a great student 
.............................

它們可以通過使用可替換元素列表列表生成，並在它們之間循環以生成置換，然後加入列表元素。Python模塊生成字符串中可能的字符串替換的所有排列？

list_input =  [["John","Matt","Steve"],["is"],["a"],["great","dedicated"],["engineer","student","athelete"]] 

example_permutation = ["John","is","a","great","engineer"]

是否有一個Python模塊/方法，其可以產生類似的置換？

來源

2014-07-08 DhruvPathak

你連這個標記用'itertools'，這是你想要的模塊。：/ – geoffspear

@Wooble，我不確定itertools是否會有支持方法，我只知道itertools來產生排列，但它並沒有讓我想到在這種情況下它是一個笛卡爾積。 – DhruvPathak

這只是名單

import itertools 

list_input =  [["John","Matt","Steve"],["is"],["a"],["great","dedicated"],["engineer","student","athelete"]] 
for element in itertools.product(*list_input): 
    print element

，或者你可以直接從你的字典@dano做的cartesian product（建議）

replacements = { 
"person":["John","Matt","Steve"], 
"quality":["great","dedicated"], 
"occupation":["engineer","student","athelete"] 
} 

for element in itertools.product(*replacements.values()): 
    print("{} is a {} {}".format(*element)) 


#output 

John is a great engineer 
John is a great student 
John is a great athelete 
John is a dedicated engineer 
John is a dedicated student 
John is a dedicated athelete 
Matt is a great engineer 
Matt is a great student 
Matt is a great athelete 
Matt is a dedicated engineer 
Matt is a dedicated student 
Matt is a dedicated athelete 
Steve is a great engineer 
Steve is a great student 
Steve is a great athelete 
Steve is a dedicated engineer 
Steve is a dedicated student 
Steve is a dedicated athelete

來源

2014-07-08 14:50:28

爲什麼不在itertools.product（* replacements.values（））：中使用'for元素，所以OP可以直接將它應用到他的數據結構中？ – dano

@dano是的，我會添加它 –

然後'print'語句將是'print（「{}是一個{} {}」。格式（*元素））'得到他想要的輸出。 – dano

Python模塊生成字符串中可能的字符串替換的所有排列？

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