加入整數中列出的名單在python

Question

這是我能想出最接近：Convert list of ints to one number?

基本上，我有一個整數列表的列表：

arr = [[2,3,4], [1,2,3], [3,4,5]] 

我如何獲得這個所以它是：[234,123,345]爲整數？

編輯：我想向量化的代碼，我可以使用：

result = np.zeros(len(arr)) 
for i in range(len(arr)): 
    result[i] = int(''.join(map(str, arr[i]))) 

Answer 1

[int(''.join(map(str, x))) for x in arr] 
# [234, 123, 345] 

Answer 2

arr = [[2,3,4], [1,2,3], [3,4,5]] 
arr2 = [] 
for x in arr: 
    z = "" 
    for y in x: 
     z = z + str(y) 
    arr2.append(int(z)) 
#the results are now in arr2 
print arr2 

Answer 3

稍微更數學方法：

>>> [sum(n*10**i for i, n in enumerate(reversed(x))) for x in arr] 
[234, 123, 345]