Python list和 np.Array 的轉換關系

 

一、List轉String

1、str list轉 string

a_list = ["h","e","l","l","o"]

print ",".join(a_list)

2、int list轉 stirng

2.1 lamda

num_list = [0,1,2,3,4,5,6,7,8,9]
num_list_new = [str(x) for x in num_list]
print ",".join(num_list_new)

2.2 map函數

num_list = [0,1,2,3,4,5,6,7,8,9]
num_list_new = map(lambda x:str(x), num_list)
print ",".join(num_list_new)

二、List轉List

1、int list轉string list   -- 參見上一小節

num_list = [0,1,2,3,4,5,6,7,8,9]
num_list_new = [str(x) for x in num_list]

 

2、string list轉int list

python2 　

results = ['1', '2', '3']
results = map(int, results)
》》》results = [1, 2, 3]

python3

results = ['1', '2', '3']
results = list(map(int, results))
》》》results = [1, 2, 3]

 

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