python怎么创建对象数组

matrix=[0,1,2,3]

matrix=[0 for i in range(4)]

print(matrix)

#coding=utf-8

import numpy as np

a = np.array([1,2,3,4,5])

print a

b = np.zeros((2,3))

print b

c = np.arange(10)

print c

d = np.arange(2,10,dtype=np.float)

print d

e = np.linspace(1.0,4.0,6)

print e

f = np.indices((3,3))

print f

a = []

a.append((1,2,4))

a.append((2,3,4))

a = np.array(a)

a.flatten()

import numpy as np

mylist = [1,2,3]

print tuple(mylist)

iarray = np.array(tuple(mylist))

print iarray