Python獲取二維數組的行列數

import numpy as np

x = np.array([[1,2,5],[2,3,5],[3,4,5],[2,3,6]])
# 輸出數組的行和列數
print x.shape  # (4, 3)
# 只輸出行數
print x.shape[0] # 4
# 只輸出列數
print x.shape[1] # 3

或者

In [48]: arr = [[1,4,7,10,15], [2,5,8,12,19], [3,6,9,16,22], [10,13,14,17,24]]

In [49]: len(arr)  #行數
Out[49]: 4

In [50]: len(arr[0])　#列數
Out[50]: 5