56、画图，学用circle画圆形
from tkinter import *
canvas = Canvas(width=800, height=600, bg='yellow')
canvas.pack(expand=YES, fill=BOTH)
k = 1
j = 1
for i in range(0, 26):
canvas.create_oval(310 - k, 250 - k, 310 + k, 250 + k, width=1)
k += j
j += 0.3
mainloop()
57、画图，学用line画直线
from tkinter import *
canvas = Canvas(width=300, height=300, bg='green')
canvas.pack(expand=YES, fill=BOTH)
x0 = 263
y0 = 263
y1 = 275
x1 = 275
for i in range(19):
canvas.create_line(x0, y0, x0, y1, width=1, fill='red')
x0 = x0 - 5
y0 = y0 - 5
x1 = x1 + 5
y1 = y1 + 5
x0 = 263
y1 = 275
y0 = 263
for i in range(21):
canvas.create_line(x0, y0, x0, y1, fill='red')
x0 += 5
y0 += 5
y1 += 5
mainloop()
58、画图，学用rectangle画方形
root = Tk()
root.title('Canvas')
canvas = Canvas(root, width=400, height=400, bg='yellow')
x0 = 263
y0 = 263
y1 = 275
x1 = 275
for i in range(19):
canvas.create_rectangle(x0, y0, x1, y1)
x0 -= 5
y0 -= 5
x1 += 5
y1 += 5
canvas.pack()
root.mainloop()
59、画图，综合例子
from tkinter import *
canvas = Canvas(width=300, height=300, bg='green')
canvas.pack(expand=YES, fill=BOTH)
x0 = 150
y0 = 100
canvas.create_oval(x0 - 10, y0 - 10, x0 + 10, y0 + 10)
canvas.create_oval(x0 - 20, y0 - 20, x0 + 20, y0 + 20)
canvas.create_oval(x0 - 50, y0 - 50, x0 + 50, y0 + 50)
import math
B = 0.809
for i in range(16):
a = 2 * math.pi / 16 * i
x = math.ceil(x0 + 48 * math.cos(a))
y = math.ceil(y0 + 48 * math.sin(a) * B)
canvas.create_line(x0, y0, x, y, fill='red')
canvas.create_oval(x0 - 60, y0 - 60, x0 + 60, y0 + 60)
for k in range(501):
for i in range(17):
a = (2 * math.pi / 16) * i + (2 * math.pi / 180) * k
x = math.ceil(x0 + 48 * math.cos(a))
y = math.ceil(y0 + 48 + math.sin(a) * B)
canvas.create_line(x0, y0, x, y, fill='red')
for j in range(51):
a = (2 * math.pi / 16) * i + (2 * math.pi / 180) * k - 1
x = math.ceil(x0 + 48 * math.cos(a))
y = math.ceil(y0 + 48 * math.sin(a) * B)
canvas.create_line(x0, y0, x, y, fill='red')
mainloop()
60、计算字符串长度
s='like'
print(len(s))
61、打印出杨辉三角形（要求打印出10行如下图）。
arr = [1]
print(1)
while len(arr)<10: # [1,1]
a = [0]+arr # [0,1,1]
b = arr+[0] # [1,1,0]
arr = [a[i]+b[i] for i in range(len(a))] # [1,2,1]
s = [str(i) for i in arr]
print(' '.join(s))
62、查找字符串
sStr1 = 'abcdefg'
sStr2 = 'cde'
print(sStr1.find(sStr2))
63、画椭圆
from tkinter import *
x = 360
y = 160
top = y - 30
bottom = y - 30
canvas = Canvas(width=400, height=600, bg='white')
for i in range(20):
canvas.create_oval(250 - top, 250 - bottom, 250 + top, 250 + bottom)
top -= 5
bottom += 5
canvas.pack()
mainloop()
64、利用ellipse 和 rectangle 画图
from tkinter import *
canvas = Canvas(width = 400,height = 600,bg = 'white')
left = 20
right = 50
top = 50
num = 15
for i in range(num):
canvas.create_oval(250 - right,250 - left,250 + right,250 + left)
canvas.create_oval(250 - 20,250 - top,250 + 20,250 + top)
canvas.create_rectangle(20 - 2 * i,20 - 2 * i,10 * (i + 2),10 * ( i + 2))
right += 5
left += 5
top += 10
canvas.pack()
mainloop()
65、一个最优美的图案
from tkinter import *
import math
class PTS:
def __init__(self):
self.x = 0
self.y = 0
points = []
def LineToDemo():
screenx = 400
screeny = 400
canvas = Canvas(width = screenx,height = screeny,bg = 'white')
AspectRatio = 0.85
MAXPTS = 15
h = screeny
w = screenx
xcenter = w / 2
ycenter = h / 2
radius = (h - 30) / (AspectRatio * 2) - 20
step = 360 / MAXPTS
angle = 0.0
for i in range(MAXPTS):
rads = angle * math.pi / 180.0
p = PTS()
p.x = xcenter + int(math.cos(rads) * radius)
p.y = ycenter - int(math.sin(rads) * radius * AspectRatio)
angle += step
points.append(p)
canvas.create_oval(xcenter - radius,ycenter - radius,
xcenter + radius,ycenter + radius)
for i in range(MAXPTS):
for j in range(i,MAXPTS):
canvas.create_line(points[i].x,points[i].y,points[j].x,points[j].y)
canvas.pack()
mainloop()
if __name__ == '__main__':
LineToDemo()
66、输入3个数a,b,c，按大小顺序输出
l=[]
for n in range(1,4):
k=input('请输入%s个整数\n'%n)
l.append(k)
l.sort(reverse=True)
print(l)
67、输入数组，最大的与第一个元素交换，最小的与最后一个元素交换，输出数组
a=[5,8,12,10]
i = a.index(max(a))
a[0],a[i] = a[i],a[0]
i = a.index(min(a))
a[-1],a[i] = a[i],a[-1]
print(a)
68、有n个整数，使其前面各数顺序向后移m个位置，最后m个数变成最前面的m个数
s=[1,2,3,5,6,7,8]
num=int(input('请输入一个小于6的整数'))
s1=s[-num:]+s[:-num]
print(s1)
69、有n个人围成一圈，顺序排号。从第一个人开始报数（从1到3报数），凡报到3的人退出圈子，问最后留下的是原来第几号的那位。
n = int(input('请输入人数：'))
li_c = list(range(1, n + 1)) # 将所有人放入一个数组
print(li_c)#打印列表
count = 0 # 设置一个变量，用于计算报数
while len(li_c) > 1:# 当数组中至少有2个元素时进行循环
li_co=li_c[:] # 把原数组拷贝到新数组中，用于限制内层循环次数
for i in range(0, len(li_co)): # 内层循环开始，从第一个人开始报数
count = count + 1 # 每报一次，count计数器加1
if count % 3 == 0:# 如果count能被3整除，则是报到3的人
print(li_co[i]) #打印报数的人
li_c.remove(li_co[i]) # 把报到3的人移除原数组，进行下一次循环
print('最后留下的是原来的第 {} 号。'.format(li_c[0]))
70、写一个函数，求一个字符串的长度，在main函数中输入字符串，并输出其长度
def fun(s):
return len(s)
if __name__=='__main__':
num=input('请输入一个字符串')
print(fun(num))
71、编写input()和output()函数输入，输出5个学生的数据记录
student = []
for i in range(5):
student.append(['','',[]])
def input_stu(stu):
for i in range(N):
stu[i][0] = raw_input('input student num:\n')
stu[i][1] = raw_input('input student name:\n')
for j in range(3):
stu[i][2].append(int(raw_input('score:\n')))
def output_stu(stu):
for i in range(N):
print '%-6s%-10s' % ( stu[i][0],stu[i][1] )
for j in range(3):
print '%-8d' % stu[i][2][j]
if __name__ == '__main__':
input_stu(student)
print student
output_stu(student)
72、列表排序及连接
if __name__ == '__main__':
a = [1,3,2]
b = [3,4,5]
a.sort() # 对列表 a 进行排序
print a
# 连接列表 a 与 b
print a+b
# 连接列表 a 与 b
a.extend(b)
print a
76、编写一个函数，输入n为偶数时，调用函数求1/2+1/4+…+1/n,当输入n为奇数时，调用函数1/1+1/3+…+1/n
def fun(n):
if n%2==0:
sum = 0
for i in range(2,n+1,2):
sum+=1/i
return sum
else:
sum=0
for i in range(1,n+1,2):
sum+=1/i
return sum
if __name__=='__main__':
num=int(input('请输入一个大于0的整数\n'))
print(fun(num))
77、循环输出列表
l=[1,2,3,4,5]
for i in l:
print(i)
78、找到年龄最大的人，并输出。请找出程序中有什么问题
if __name__ == '__main__':
person = {"li":18,"wang":50,"zhang":20,"sun":22}
m = 'li'
for key in person.keys():
if person[m] < person[key]:
m = key
print '%s,%d' % (m,person[m])
79、字符串排序
if __name__ == '__main__':
str1 = raw_input('input string:\n')
str2 = raw_input('input string:\n')
str3 = raw_input('input string:\n')
print str1,str2,str3
if str1 > str2 : str1,str2 = str2,str1
if str1 > str3 : str1,str3 = str3,str1
if str2 > str3 : str2,str3 = str3,str2
print 'after being sorted.'
print str1,str2,str3
80、海滩上有一堆桃子，五只猴子来分。第一只猴子把这堆桃子平均分为五份，多了一个，这只猴子把多的一个扔入海中，拿走了一份。第二只猴子把剩下的桃子又平均分成五份，又多了一个，它同样把多的一个扔入海中，拿走了一份，第三、第四、第五只猴子都是这样做的，问海滩上原来最少有多少个桃子？
# 第五只猴子都是这样做的，问海滩上原来最少有多少个桃子？
if __name__ == '__main__':
i = 0
j = 1
x = 0
while (i < 5) :
x = 4 * j
for i in range(0,5) :
if(x%4 != 0) :
break
else :
i += 1
x = (x/4) * 5 +1
j += 1
print(x)
81、809*??=800*??+9*?? 其中??代表的两位数, 809*??为四位数，8*??的结果为两位数，9*??的结果为3位数。求??代表的两位数，及809*??后的结果。
for i in range(10,200):
if 8*i >=10 and 8*i<100 and 9*i>=100 and 9*i<1000 and 809*i>=1000 and 809*i<10000:82
print(i, i * 809)
print(809*i==800*i+9*i)
# if int(len(str(8*i)))==2 and int(len(str(9*i)))==3 and int(len(str(809*i)))==4:
# print(i,i*809)
83、八进制转换为十进制
print(bin(10)) #十转二
print(oct(10)) #十转八
print(hex(10)) #十转16
print(int('10',8)) #八转十
print(int('10',2)) #二转十
print(int('10',16)) #16转十
84、连接字符串
mylist = ['Brazil', 'Russia', 'India', 'China']
s='##'.join(mylist)
print(s)
85、输入一个奇数，然后判断最少几个 9 除于该数的结果为整数。
if __name__ == '__main__':
zi = int(raw_input('输入一个数字:\n'))
n1 = 1
c9 = 1
m9 = 9
sum = 9
while n1 != 0:
if sum % zi == 0:
n1 = 0
else:
m9 *= 10
sum += m9
c9 += 1
print '%d 个 9 可以被 %d 整除 : %d' % (c9,zi,sum)
r = sum / zi
print '%d / %d = %d' % (sum,zi,r)
86、两个字符串连接程序
if __name__ == '__main__':
a = "hello"
b = "python"
# 连接字符串
c = a + b
print c
83、求0—7所能组成的奇数个数
组成1位数是4个。
组成2位数是7*4个。
组成3位数是7*8*4个。
组成4位数是7*8*8*4个
s = 1
sum=0
for i in range(1,9):
if i ==1:
s = 4
elif i ==2:
s =4*7
if i>2:
s *=8
sum+=s
print( '%d位数的奇数个数为%d'%(i,s))
print ('总和为：sum=%d'%sum)
87、回答结果（结构体变量传递）
if __name__ == '__main__':
class student:
x = 0
c = 0
def f(stu):
stu.x = 20
stu.c = 'c'
a= student()
a.x = 3
a.c = 'a'
f(a)
print a.x,a.c
88、读取7个数（1—50）的整数值，每读取一个值，程序打印出该值个数的＊
if __name__ == '__main__':
n = 1
while n <= 7:
a = int(raw_input('input a number:\n'))
while a < 1 or a > 50:
a = int(raw_input('input a number:\n'))
print a * '*'
n += 1
89、某个公司采用公用电话传递数据，数据是四位的整数，在传递过程中是加密的，加密规则如下：每位数字都加上5,然后用和除以10的余数代替该数字，再将第一位和第四位交换，第二位和第三位交换。
l=[]
for n in range(1,5):
num_str=input('请输入第%s位整数'%n)
l.append(num_str)
l[n-1]=(int(l[n-1])+5)%10
# print(l)
l[0],l[3]=l[3],l[0]
l[1],l[2]=l[2],l[1]
print(l)
90、列表使用实例
#list
#新建列表
testList=[10086,'中国移动',[1,2,4,5]]
#访问列表长度
print len(testList)
#到列表结尾
print testList[1:]
#向列表添加元素
testList.append('i\'m new here!')
print len(testList)
print testList[-1]
#弹出列表的最后一个元素
print testList.pop(1)
print len(testList)
print testList
#list comprehension
#后面有介绍，暂时掠过
matrix = [[1, 2, 3],
[4, 5, 6],
[7, 8, 9]]
print matrix
print matrix[1]
col2 = [row[1] for row in matrix]#get a column from a matrix
print col2
col2even = [row[1] for row in matrix if row[1] % 2 == 0]#filter odd item
print col2even
91、时间函数
if __name__ == '__main__':
import time
print time.ctime(time.time())
print time.asctime(time.localtime(time.time()))
print time.asctime(time.gmtime(time.time()))
if __name__ == '__main__':
import time
start = time.clock()
for i in range(10000):
print i
end = time.clock()
print 'different is %6.3f' % (end - start)
92、时间函数举例4,一个猜数游戏，判断一个人反应快慢
def tm094():
import time,random
print('《猜大小0-1000之间》')
x = random.randint(0,1000)
flag = input('是否开始(y/n)：')
if flag=='y':
s = time.time()
while 1:
m = int(input('请输入数字：'))
if m>x:
print('大了')
elif m<x:
print('小了')
else:
print('bingo!')
break
e = time.time()
print('耗时%.2f秒'%(e-s))
print(time.sleep(5))
93、字符串日期转换为易读的日期格式
from dateutil import parser
dt = parser.parse("Aug 28 2015 12:00AM")
print dt
94、计算字符串出现的次数
if __name__ == '__main__':
str1 = raw_input('请输入一个字符串:\n')
str2 = raw_input('请输入一个子字符串:\n')
ncount = str1.count(str2)
print ncount
95、从键盘输入一些字符，逐个把它们写到磁盘文件上，直到输入一个 # 为止
with open('num.txt','w+') as f:
while True:
s=input('请输入')
f.write(s)
if s=='#':
break
f.close()
96、 从键盘输入一个字符串，将小写字母全部转换成大写字母，然后输出到一个磁盘文件"test"中保存
s=input('请输入一个字符').upper()
with open('test.txt','w+') as f:
f.write(s)
f.close()
97、有两个磁盘文件A和B,各存放一行字母,要求把这两个文件中的信息合并(按字母顺序排列), 输出到一个新文件C中
with open('num.txt','r+') as f:
s=open('test.txt','r+')
m=open('s.txt','w+')
a=f.read()
b=s.read()
c=list(a+b)
num=''.join(c)
m.write(num)
f.close()
s.close()
m.close()
98、列表转换为字典
i = ['a', 'b']
l = [1, 2]
print dict([i,l])