求助，希望大神帮忙看下。为什么import random出现问题

wsywq

#!/usr/bin/env python3
# !  _*_ coding:utf-8 _*_

from PIL import Image, ImageDraw, ImageFont, ImageFilter

import random

# 随机字母:
def rndChar():
    return chr(random.randint(65, 90))

# 随机颜色1:
def rndColor():
    return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255))

# 随机颜色2:
def rndColor2():
    return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127))

# 240 x 60:
width = 60 * 4
height = 60
image = Image.new('RGB', (width, height), (255, 255, 255))
# 创建Font对象:
font = ImageFont.truetype('Arial.ttf', 36)
# 创建Draw对象:
draw = ImageDraw.Draw(image)
# 填充每个像素:
for x in range(width):
    for y in range(height):
        draw.point((x, y), fill=rndColor())
# 输出文字:
for t in range(4):
    draw.text((60 * t + 10, 10), rndChar(), font=font, fill=rndColor2())
# 模糊:
image = image.filter(ImageFilter.BLUR)
image.save('code.jpg', 'jpeg')以上是源代码，最近初学看廖雪峰大大的Python教程，遇到一些问题
以下是报错
/usr/bin/python3.5 /home/ywq/test.py
Traceback (most recent call last):
  File "/home/ywq/test.py", line 6, in <module>
    import random
  File "/usr/lib/python3.5/random.py", line 45, in <module>
    from hashlib import sha512 as _sha512
ImportError: cannot import name 'sha512'

Process finished with exit code 1

crossin先生

没看出来，也没能搜到
可能1，你有代码的命名和系统冲突了，比如叫 random.py hashlib.py 之类
可能2，你系统里的python版本有点乱。可以考虑用virtualenv 之类的虚拟环境重建一个