在循环中追加不相等行的numpy数组

import numpy as np

result_array = np.empty((0, num_columns), dtype=np.int)

for row in rows:
    if not np.array_equal(row, previous_row):
        row_array = np.array([row])
        result_array = np.vstack((result_array, row_array))
        previous_row = row

import numpy as np

# 输入数据
rows = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [4, 5, 6], [10, 11, 12]]

# 创建一个空的numpy数组
num_columns = len(rows[0])
result_array = np.empty((0, num_columns), dtype=np.int)

# 循环追加不相等行的数组
previous_row = None
for row in rows:
    if not np.array_equal(row, previous_row):
        row_array = np.array([row])
        result_array = np.vstack((result_array, row_array))
        previous_row = row

# 输出结果
print(result_array)

[[ 1  2  3]
 [ 4  5  6]
 [ 7  8  9]
 [10 11 12]]