python - 如何将众多类型的列表附加到单个字符串(python)

Question

如果我有这样的列表:

arr = [
         ["Hi ", "My ", "Name "],
         ["Is ", "Sally. ", "Born "],
         [3, 13, 2010]  
]

你如何在一个声明的字符串中得到它

H, My Name Is Sally. Born 3 13 2010

有没有比

更简单的方法

example = ""
for x in range(len(arr)): 
    for j in range(len(arr[x])):
        example = example + str(arr[x][j])
print (example) 

Answer 1

你可以使用' '.join:

myList = [
     ["Hi ", "My ", "Name "],
     ["Is ", "Sally. ", "Born "],
     [3, 13, 2010]  
] 

sentence = ''.join(str(i)+[' ', ''][type(i) == str] for b in myList for i in b)[:-1]

输出:

'Hi My Name Is Sally. Born 3 13 2010'