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# coding=utf-8
import numpy as np
import random
#使用numpy生成数组,得到ndarray的类型
t1 = np.array([1,2,3,])
print(t1)
print(type(t1))
t2 = np.array(range(10))
print(t2)
print(type(t2))
t3 = np.arange(4,10,2)
print(t3)
print(type(t3))
print(t3.dtype)
print("*"*100)
#numpy中的数据类型
t4 = np.array(range(1,4),dtype="i1")
print(t4)
print(t4.dtype)
##numpy中的bool类型
t5 = np.array([1,1,0,1,0,0],dtype=bool)
print(t5)
print(t5.dtype)
#调整数据类型
t6 = t5.astype("int8")
print(t6)
print(t6.dtype)
#numpy中的小数
t7 = np.array([random.random() for i in range(10)])
print(t7)
print(t7.dtype)
t8 = np.round(t7,2)
print(t8)