# -- coding: UTF-8 --
import numpy as np
# np.roll(a, shift, axis=None)
# 意思是将a，沿着axis的方向，滚动shift长度
# example1
a = np.arange(10)
print(a)
for i in range(5):
a = np.roll(a, 2)
print(a)
# example 2
b = np.reshape(a, (2, 5))
print(b)
for j in range(5):
b = np.roll(b, shift=1, axis=1)
print(b)
# example 3
c = np.arange(25)
c = np.reshape(c, (5, 5))
print(c)
for k in range(5):
# 先横着翻，再竖着翻
c = np.roll(np.roll(c, shift=1, axis=0), shift=1, axis=1)
print(c)
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