Happy journey of simple Python: general application of Python basic syntax

Defonds 2020-11-13 04:49:23
happy journey simple python general


1. Addition of two numbers

stay Python in , You can use the arithmetic addition operator + Add two numbers . This operator takes two operands and returns the result of the addition .Python The number in can be intfloat or complex And so on . You can use the same data type or Python Supported data types intfloat or complex To carry the additive value .

1.1. grammar

The operation syntax of arithmetic addition is as follows :

result = operand1 + operand2

+ Operators for numbers operand1 and operand2 Add and return the result . In the example above , We store the results in a file called result Variables in .
To quickly demonstrate the operator , You can open it Python Shell Then run the following operation :

>>> 25 + 63
88
>>> a = 32
>>> b = 87
>>> a + b
119

Before you add, you need to make sure that the variables you pass in are numbers , such as ,intfloat or complex.

1.2. Add two integers

In the next example , We're going to add two integers , And print the results to the standard console output .

a = 1
b = 6
# add two integer numbers
sum = a + b
# display the sum
print(sum)

Execution and output :
 Add two integers .png
a and b The data types of are all integers , So the result of addition is also an integer .

1.3. Add two floating-point numbers

In the next example , We're going to add two floating-point data , And print the results to the standard console output .

a = 1.5
b = 6.3
# add two float numbers
sum = a + b
# display the sum
print(sum)

Execution and output :
 Add two floating-point numbers .png
so , The result of adding two floating-point types is also floating-point type .

1.4. Add integers and floats

In the next example , We created a floating-point variable and an integer variable , And then use + The operator adds it , And then print the results .

a = 1.5
b = 6
# add a float and an int
sum = a + b
# display the sum
print(sum)

Execution and output :
 Add integers and floats .png
In the example above ,a For floating point b Is an integer . When you add two different data types , The data of the lower type will be promoted to the type of the data of the higher type . So here , When you add integers and floats , Integers are promoted to floating point types , The data type of the operands with the higher data type becomes the data type of the result .

1.5. Add two complex numbers

Python Support complex number . In this example, we add two complex numbers and see the result .

a = (1 + 8j)
b = (6 + 4j)
# add two complex numbers
sum = a + b
# display the sum
print(sum)

Execution and output :
 Add two complex numbers .png
In the addition of complex numbers , Add the real parts of two numbers , Then add the imaginary parts of the two numbers .

1.6. Summary

In this article, we learned how to add two different types of data .

2. Randomly generate a positive or negative number

2.1. Generate a random number

Random numbers are used in such things as signal processing 、 Data analysis 、 Statistics and other applications have attracted attention . stay Python You can introduce modules in random And use the function randInt() To generate a random number .

2.2. randInt() The grammar of

Before you call randInt() You have to introduce random package :

import random

randInt() The grammar is as follows :

randomnumber = random.randint(minimum, maximum)

among

  • [minimum, maximum] Is the range of random numbers
  • randint() Returns an integer
    Generating random numbers can be used to simulate uniform probability events 、 gambling 、 Statistical sampling and so on .

2.3. Python Example of generating random numbers in

In the next example , We will be in the range of [10, 152] To generate a random number .

import random
randomnumber = random.randint(10, 152)
print(randomnumber)

Execution and output :
Python Example of generating random numbers in .png
so ,randint() Each execution of the function returns a different random number .

2.4. Generate random negative numbers

You can also provide a negative range for generating random numbers . In the next example , We will be in the range of [-100, -21] To generate a random number .

import random
randomnumber = random.randint(-100, -21)
print(randomnumber)

Execution and output :
 Generate random negative numbers .png

2.5. Summary

In this paper , We've learned how to do this through detailed examples Python To generate a random number .

Reference material

版权声明
本文为[Defonds]所创,转载请带上原文链接,感谢

  1. 利用Python爬虫获取招聘网站职位信息
  2. Using Python crawler to obtain job information of recruitment website
  3. Several highly rated Python libraries arrow, jsonpath, psutil and tenacity are recommended
  4. Python装饰器
  5. Python实现LDAP认证
  6. Python decorator
  7. Implementing LDAP authentication with Python
  8. Vscode configures Python development environment!
  9. In Python, how dare you say you can't log module? ️
  10. 我收藏的有关Python的电子书和资料
  11. python 中 lambda的一些tips
  12. python中字典的一些tips
  13. python 用生成器生成斐波那契数列
  14. python脚本转pyc踩了个坑。。。
  15. My collection of e-books and materials about Python
  16. Some tips of lambda in Python
  17. Some tips of dictionary in Python
  18. Using Python generator to generate Fibonacci sequence
  19. The conversion of Python script to PyC stepped on a pit...
  20. Python游戏开发,pygame模块,Python实现扫雷小游戏
  21. Python game development, pyGame module, python implementation of minesweeping games
  22. Python实用工具,email模块,Python实现邮件远程控制自己电脑
  23. Python utility, email module, python realizes mail remote control of its own computer
  24. 毫无头绪的自学Python,你可能连门槛都摸不到!【最佳学习路线】
  25. Python读取二进制文件代码方法解析
  26. Python字典的实现原理
  27. Without a clue, you may not even touch the threshold【 Best learning route]
  28. Parsing method of Python reading binary file code
  29. Implementation principle of Python dictionary
  30. You must know the function of pandas to parse JSON data - JSON_ normalize()
  31. Python实用案例,私人定制,Python自动化生成爱豆专属2021日历
  32. Python practical case, private customization, python automatic generation of Adu exclusive 2021 calendar
  33. 《Python实例》震惊了,用Python这么简单实现了聊天系统的脏话,广告检测
  34. "Python instance" was shocked and realized the dirty words and advertisement detection of the chat system in Python
  35. Convolutional neural network processing sequence for Python deep learning
  36. Python data structure and algorithm (1) -- enum type enum
  37. 超全大厂算法岗百问百答(推荐系统/机器学习/深度学习/C++/Spark/python)
  38. 【Python进阶】你真的明白NumPy中的ndarray吗?
  39. All questions and answers for algorithm posts of super large factories (recommended system / machine learning / deep learning / C + + / spark / Python)
  40. [advanced Python] do you really understand ndarray in numpy?
  41. 【Python进阶】Python进阶专栏栏主自述:不忘初心,砥砺前行
  42. [advanced Python] Python advanced column main readme: never forget the original intention and forge ahead
  43. python垃圾回收和缓存管理
  44. java调用Python程序
  45. java调用Python程序
  46. Python常用函数有哪些?Python基础入门课程
  47. Python garbage collection and cache management
  48. Java calling Python program
  49. Java calling Python program
  50. What functions are commonly used in Python? Introduction to Python Basics
  51. Python basic knowledge
  52. Anaconda5.2 安装 Python 库(MySQLdb)的方法
  53. Python实现对脑电数据情绪分析
  54. Anaconda 5.2 method of installing Python Library (mysqldb)
  55. Python implements emotion analysis of EEG data
  56. Master some advanced usage of Python in 30 seconds, which makes others envy it
  57. python爬取百度图片并对图片做一系列处理
  58. Python crawls Baidu pictures and does a series of processing on them
  59. python链接mysql数据库
  60. Python link MySQL database