发布时间：2025-06-24 19:57:51  作者：北方职教升学中心  阅读量：401

希望这篇博客能够帮助你提升Python技能，成为一名出色的架构师！

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1. Hello World

print("Hello, World!")

2. 交换两个变量的值

a,b =1,2a,b =b,a

3. 计算列表的平均值

numbers =[1,2,3,4,5]average =sum(numbers)/len(numbers)print(average)

4. 生成一个范围内的随机数

importrandomrandom_number =random.randint(1,100)print(random_number)

5. 检查一个数是否为素数

defis_prime(n):ifn <=1:returnFalsefori inrange(2,int(n**0.5)+1):ifn %i ==0:returnFalsereturnTrue

6. 斐波那契数列

deffibonacci(n):a,b =0,1for_ inrange(n):print(a,end=' ')a,b =b,a +bfibonacci(10)

7. 反转字符串

s ="Hello, World!"reversed_s =s[::-1]print(reversed_s)

8. 检查回文

defis_palindrome(s):returns ==s[::-1]print(is_palindrome("racecar"))

9. 计算阶乘

deffactorial(n):ifn ==0:return1returnn *factorial(n -1)print(factorial(5))

10. 找到列表中的最大值和最小值

numbers =[1,2,3,4,5]max_value =max(numbers)min_value =min(numbers)print(max_value,min_value)

11. 列表去重

numbers =[1,2,2,3,4,4,5]unique_numbers =list(set(numbers))print(unique_numbers)

12. 字符串中单词计数

s ="hello world hello"word_count ={}forword ins.split():word_count[word]=word_count.get(word,0)+1print(word_count)

13. 合并两个字典

dict1 ={'a':1,'b':2}dict2 ={'b':3,'c':4}merged_dict ={**dict1,**dict2}print(merged_dict)

14. 计算两个日期之间的天数

fromdatetime importdatetimedate1 =datetime(2022,1,1)date2 =datetime(2022,12,31)days_difference =(date2 -date1).daysprint(days_difference)

15. 生成列表的所有排列

importitertoolsnumbers =[1,2,3]permutations =list(itertools.permutations(numbers))print(permutations)

16. 读取文件内容

withopen('file.txt','r')asfile:content =file.read()print(content)

17. 写入文件

withopen('file.txt','w')asfile:file.write("Hello, World!")

18. 发送HTTP请求

importrequestsresponse =requests.get('https://api.github.com')print(response.json())

19. 创建一个类和对象

classDog:def__init__(self,name):self.name =name    defbark(self):print(f'{self.name}says woof!')my_dog =Dog('Rex')my_dog.bark()

20. 异常处理

try:result =10/0exceptZeroDivisionError:print("Cannot divide by zero")

21. Lambda函数

add =lambdax,y:x +yprint(add(2,3))

22. 列表推导式

squares =[x**2forx inrange(10)]print(squares)

23. 字典推导式

squares ={x:x**2forx inrange(10)}print(squares)

24. 过滤列表中的偶数

numbers =[1,2,3,4,5,6]even_numbers =[x forx innumbers ifx %2==0]print(even_numbers)

25. 计算字符串的长度

s ="Hello, World!"length =len(s)print(length)

26. 使用装饰器

defmy_decorator(func):defwrapper():print("Something is happening before the function is called.")func()print("Something is happening after the function is called.")returnwrapper@my_decoratordefsay_hello():print("Hello!")say_hello()

27. 生成随机密码

importstringimportrandomdefgenerate_password(length):characters =string.ascii_letters +string.digits +string.punctuation    return''.join(random.choice(characters)fori inrange(length))print(generate_password(12))

28. 使用Counter统计元素频率

fromcollections importCounterdata =['a','b','c','a','b','b']counter =Counter(data)print(counter)

29. 合并多个列表

list1 =[1,2,3]list2 =[4,5,6]merged_list =list1 +list2print(merged_list)

30. 获取当前日期和时间

fromdatetime importdatetimenow =datetime.now()print(now)

31. 将字符串转换为日期

fromdatetime importdatetimedate_string ="2023-01-01"date_object =datetime.strptime(date_string,'%Y-%m-%d')print(date_object)

32. 计算两点之间的距离

importmathdefdistance(x1,y1,x2,y2):returnmath.sqrt((x2 -x1)**2+(y2 -y1)**2)print(distance(0,0,3,4))

33. 检查文件是否存在

importosfile_exists =os.path.exists('file.txt')print(file_exists)

34. 获取文件大小

file_size =os.path.getsize('file.txt')print(file_size)

35. 压缩文件

importzipfilewithzipfile.ZipFile('archive.zip','w')aszipf:zipf.write('file.txt')

36. 解压文件

withzipfile.ZipFile('archive.zip','r')aszipf:zipf.extractall('extracted')

37. 计时器

importtimestart_time =time.time()# Some code to timeend_time =time.time()print(f"Execution time: {end_time -start_time}seconds")

38. 多线程

importthreadingdefprint_numbers():fori inrange(5):print(i)thread =threading.Thread(target=print_numbers)thread.start()thread.join()

39. 读取JSON文件

importjsonwithopen('data.json','r')asfile:data =json.load(file)print(data)

40. 写入JSON文件

data ={'name':'John','age':30}withopen('data.json','w')asfile:json.dump(data,file)

41. 计算字符串的哈希值

importhashlibs ="Hello, World!"hash_object =hashlib.sha256(s.encode())hash_hex =hash_object.hexdigest()print(hash_hex)

42. 检查列表是否为空

numbers =[]is_empty =notnumbersprint(is_empty)

43. 生成当前时间的时间戳

importtimetimestamp =time.time()print(timestamp)

44. 延迟执行

importtime```pythontime.sleep(5)# 延迟5秒print("5 seconds have passed")

45. 使用正则表达式匹配字符串

importrepattern =r'\d+'s ="The number is 12345"matches =re.findall(pattern,s)print(matches)

46. 检查字符串是否包含子字符串

s ="Hello, World!"contains ="World"insprint(contains)

47. 列出目录中的所有文件

importosfiles =os.listdir('.')print(files)

48. 获取环境变量

importoshome_directory =os.getenv('HOME')print(home_directory)

49. 执行外部命令

importsubprocessresult =subprocess.run(['ls','-l'],stdout=subprocess.PIPE)print(result.stdout.decode())

50. 将数据写入CSV文件

importcsvdata =[['Name','Age','City'],['Alice',30,'New York'],['Bob',25,'San Francisco']]withopen('people.csv','w',newline='')asfile:writer =csv.writer(file)writer.writerows(data)

总结

以上是50个常见的Python代码段，涵盖了从基本操作到高级用法的方方面面。无论你是初学者还是经验丰富的开发者，掌握一些常见的代码段都能帮助你提升编程技能。在这篇博客中，我们将分享50个常见的Python代码段，助你从Python小白成长为架构师。Happy coding!