Question

我正在尝试学习python编程。我尝试了以下代码，但它显示了以下错误。

就像你考虑一个数组Z = [1,2,3,4,5,6,7,8,9,10,11,12,13,14]

like output生成数组R = [[1,2,3,4], [2,3,4,5], [3,4,5,6], ..., [11,12,13,14]]

import numpy as np

Z = np.arange(1,15)

print(Z)

size = 4
step = 1

R = [Z[i : i + size] for i in range(0, len(Z), step)]

print(R)

rank = assert np.array_equal(R[1,:],np.array([2, 3, 4, 5]))

print(rank)

但是当检查np.array_equal时，它会给我错误。

rank = assert np.array_equal（R [1，：]，np.array（[2,3,4,5]）） ^ SyntaxError：语法无效

Answer 1

我修复了创建语法，因此您只能获得大小为4的“切片”：

import numpy as np

Z = np.arange(1,15)

print(Z)

size = 4
step = 1

# Fixed: len(Z)-size not len(Z)
R = np.array( [Z[i : i + size] for i in range(0, len(Z)-size , step)] ) 

try:
    assert R.shape == (len(Z)-size,size) 

except ( AssertionError,IndexError ):
    print(f'Error asserting:     R.shape == ({len(Z)-size},{size})')

else: # print success message if assert is ok:
    print(f'Asserted:            R.shape == ({len(Z)-size},{size})')

这个断言将抛出：

try:
    assert R.shape[1] == 99
except AssertionError :
    print("Error asserting:      assert R.shape[1] == 99")

在python中获取无效语法

1 个答案: