numpy.arange()

numpy.arange() creates an array

* Syntax: arange([start,] stop[, step,], dtype=None, , like=None)

• start: start value, [optional], the default is 0
• stop: stop value, [required]
• step: step size, [optional], the default is 1
• dtype: the format of the output array, [optional], automatically inferred by default
• like: referencing objects to allow creation of non-NumPy arrays

import numpy as np

# 创建数组，默认从0开始，数值范围为0-9，共10个数
arr = np.arange(10) 
# 结果：[0 1 2 3 4 5 6 7 8 9]

# 创建数组，起始数值为1，终止数值为9
arr = np.arange(1,10)
# 结果：[1 2 3 4 5 6 7 8 9]

# 创建数组，起始数值范围为0-9，步长为2
arr = np.arange(0,10,2)
# 结果：[0 2 4 6 8]