1 #函数应用：计算两个正数的最大公约数和最小公倍数
2 def function1(n1,n2):
3 if n1 > n2:
4 n1 , n2 = n2 , n1
5 for i in range(n1,0,-1):
6 if n1 % i == 0 and n2 % i == 0:
7 return i
8 def function2(n1,n2):
9 return n1*n2//function1(n1,n2)
10
11 #函数应用：判断是否为素数
12 def sushu(number):
13 a = 2
14 for i in range(2 , number - 1):
15 if number % i == 0 :
16 a = 1
17 if a == 1:
18 return False
19 else:
20 return True
21 #运用
22 s1 = 'hello ' * 4
23 s2 = 'hello,world'
24 print(len(s1),s2.title(),s1.upper())
25 print(s1.index('lo'))
26 print('{0} * {1} = {2}'.format(s1,s2,s1 + s2))
27
28 #列表
29 list1 = [3,4,5,6,7,88,90]
30 print(list1)
31 a = list1[3:5]
32 b = list1[2]
33 print(a,b)
34 for x in range(len(list1)):
35 print(list1[x])
36 for index, elem in enumerate(list1):
37 print(index,elem)
38 list1.append(b)
39 list1.insert(4,20)
40 print(list1)
41 list2 = ['sdf','alte','cllect','fast','baby']
42 list3 = sorted(list2)
43 list4 = list2.sort(reverse = True)
44 print(list2,'\n',list3,'\n',list4)
45
46 #生成器
47 import sys
48 list1= [x for x in range(1,10)]
49 print(list1)
50 print(sys.getsizeof(list1))
51
52 #元组
53 import sys
54 list1 = ('cmd',5,'贵州遵义')
55 print(list1,sys.getsizeof(list1))
56
57 #集合不存在重复性
58 set1 = {1, 4, 23, 55, 43,4}
59 print(set1)
60 print('lenth:', len(set1))
61 set1.add(88)
62 set1.update([5,7])
63 set1.discard(4)
64 set1.remove(1)
65 print(set1)
66 set2 = set(range(0,5))
67 print(set2)
68 print(set1 & set2)
69 print(set1 | set2)
70 print(set1 - set2)
71 print(set1 <= set2)
72 print(set1 ^ set2)
73
74 #字典
75 scores = dict(a = 1, b = 3, c = 6)
76 scores1 = {'gz':20,'sc':66,'zy':3}
77 print(scores)
78 print(scores1)
79 cs = scores1['gz']
80 print(cs)
81 for key in scores:
82 print(key,scores[key])
83
84 #类
85 class studengt(object):
86 def __init__(self, name,age):
87 self.name = name
88 self.age = age
89 def study(self, discipline):
90 print('%s正在学习%s。'%(self.name, discipline))
91 def whatch(self):
92 if self.age < 18:
93 print('%s正在看 熊出没' %self.name)
94 else:
95 print('%s正在看 迪迦.'%self.name)
96 def studengt1():
97 stu1 = studengt('wgy', 23)
98 stu1.whatch()
99 stu1.study('zgggS')
100
101 print(studengt1())
102
103 from time import sleep
104 class day():
105 def __init__(self, hour = 0, minute = 0, second = 0):
106 self.hour = hour
107 self.minute = minute
108 self.second = second
109 def cycle(self):
110 self.second += 1
111 if self.second == 60:
112 self.second = 0
113 self.minute += 1
114 if self.minute == 60:
115 self.minute = 1
116 self.hour += 0
117 if self.hour == 24:
118 self.hour = 0
119 def disply (self):
120 print('%02d : %02d : %02d' %(self.hour, self.minute, self.second))
121
122 def main():
123 time = day(12,33,44)
124 while True:
125 day.disply( time)
126 sleep(1)
127 day.cycle(time)
128 if __name__ == '__main__':
129 main()
130
131 #正则表达式(qq，用户名)
132 import re
133 #调用正则表达式模块re
134 def main():
135 user_name = input('请输入用户名：')
136 qq_number = input('请输入qq号：')
137 m1 = re.match(r'^[0-9a-zA-Z]{6,20}$', user_name) #判断格式是否符合
138 m2 = re.match(r'^[1-9]\d{4,11}', qq_number)
139 if not m1:
140 print('用户名不存在')
141 if not m2:
142 print('qq不存在')
143 if m1 and m2:
144 print('格式正确')
145
146 print(main())
147
148 #多进程实现文件下载
149 from multiprocessing import Process
150 #linux用os模块fork()函数创建进程
151 #Windows用multiprocessing模块中的Process类创建进程
152 from os import getpid
153 #返回进程号
154 from random import randint
155 from time import time, sleep
156 def downlode(filename):
157 print('启动下载程序，进程号%s' % getpid)
158 print('开始下载%s...' %filename)
159 downlode_time = randint(5,10)
160 sleep(downlode_time)
161 print('%s下载完成！耗费%d秒' %(filename, downlode_time))
162
163 def main():
164 start = time() #开始计时
165 m1 = Process(target = downlode, args = ('python从零开始.ptf', ))
166 #Process类创建了进程对象，通过target参数我们传入一个函数来表示进程启动后要执行的代码，后面的args是一个元组，它代表了传递给函数的参数。
167 m1.start()
168 m2 = Process(target= downlode, args = ('python的多进程.ptf', ))
169 m2.start()
170 #start方法用来启动进程
171 m1.join()
172 #join方法表示等待进程执行结束
173 m2.join()
174 end = time() #结束计时
175 print('总共耗费了%.2f秒' %(end - start))
176
177 if __name__ == '__main__':
178 main()
179
180 #多进程实现文件下载
181 from threading import Thread
182 from random import randint
183 from time import time, sleep
184 def download(filename):
185 print('%s文件开始下载....' %filename)
186 time_filename = randint(5, 12)
187 sleep(time_filename)
188 print('%s下载结束，下载花费%d秒' %(filename, time_filename))
189 def main():
190 start = time()
191 m1 = Thread(target = download, args = ('python从零开始.ptf', ))
192 m1.start()
193 m2 = Thread(target = download, args=('pytn的多线程应用.pdf', ))
194 m2.start()
195 m1.join()
196 m2.join()
197 end = time()
198 print('总耗费%d秒.' %(start - end))
199 if __name__ == '__main__':
200 main()
201
202 #API的调用
203 from time import time
204 from threading import Thread
205 import requests
206 class daygas():
207 def __init__(self, url):
208 self.url = url
209
210 def run(self):
211 resp = requests.get(self.url)
212 with open(daygas.json,'w') as f:
213 f.write(resp)
214 def main():
215 resp = requests.get('http://api.tianapi.com/txapi/tianqi/index')
216 for x in resp:
217 url = x
218 daygas(url)
219
220 if __name__ == '__main__':
221 main()
222
223 #操作图像
224 from PIL import Image
225 image = Image.open('C:/Users/ASUS/Pictures/Saved Pictures/1.jpg')
226 print(image.format, image.size, image.mode)
227 image.show()
228 rect = 60, 30, 330, 340
229 image.crop(rect).show()
