1.Problem

L1:在屏幕上让你的英文名字水平移动起来
L2:作业L2 在80*80点阵上用字符拼出你想画的东西，并让它旋转起来，希望脑洞大开！（比如字符、火柴人、火箭等等）

2.Abstract

　　In this text,we are going to talk about a method to move a certain name horizontally in the IPython shell.

3.Background Introduction

　　With the preceeding knowledge of the 'for' loop and the dictionary,we are able to write a little program to make our names move horizontally with little effort.Additionally,you can input the times that you want the name to move horizontally.

4.Main L1:

L1:

x='1'
d={'1':'  '*1 ,'2':'    '*2,'3':'      '*3,'4':'        '*4,'5':'          '*4,'6':'            '*4,'7':'              '*4,'8':'                '*4}
import sys
import time
times=input('Please input the times you want the name to move horiziontally')
for y in range(times):
  for x in ['1','2','3','4','5','6','7','8']:
    print d[x],'#####   #######'
    print d[x],'   #       #'
    print d[x],'  #        #'
    print d[x],' #         #'
    print d[x],'#####      #'    
    print('\n')  
    time.sleep(0.3)    
    sys.stderr.write("\x1b[2J\x1b[H")

5.Main L2:

L2:

x='1'
d={'1':' '}
import time
import math
import sys
import os
k=0
j=1  
for x in range(2):
    for k in [0,0.25*math.pi,0.5*math.pi,0.6*math.pi,0.75*math.pi,1*math.pi,1.25*math.pi,1.5*math.pi,1.75*math.pi,2*math.pi,2.25*math.pi,2.5*math.pi,2.75*math.pi,3*math.pi]:
        i=os.system('cls')        
        print ('\n')*int(math.sin(k)*5+6)   
        print d['1']*int(math.cos(k)*25+30),'#####   #######'
        print d['1']*int(math.cos(k)*25+30),'   #       #'
        print d['1']*int(math.cos(k)*25+30),'  #        #'
        print d['1']*int(math.cos(k)*25+30),' #         #'
        print d['1']*int(math.cos(k)*25+30),'#####      #'      
        time.sleep(0.3)    

6.Conclusion

　　L1:We finally make it moving,but somehow a problem arises with the command"i=os.system('cls')".Here we can not clear the command in the shell and I have tried many times but it doesn't work fine on my mac.So laterly,I find another way as ''sys.stderr.write("\x1b[2J\x1b[H")''

　 L2:In this section, I find that the order of os.system('cls')is only valid for the windows,not for mac.That's the reason why I choos to display my result in windows.Additionally,we use the function math.sin and math.cos to give a parameter function of a circle to let the name rotate around a point.

7.Result

L1:

L2:

8.Acknowledgement

1.How to think like a computer scientist – Learning with Python: Interactive Edition 2.0
2.Python Tutorial - Cai Hao
3.Zong Yue-(Provide me with the VIP in 作业部落 and PC)