简明 Python 基础学习教程

  • Post category:Python

作为《简明Python基础学习教程》的作者,我很高兴为您提供完整攻略。

第一步:了解Python编程语言

Python是一种常用的编程语言,有着易于入门、简洁优美和丰富的库等特点。学习Python需先了解一些基本概念,如变量、数据类型、运算符、条件语句、循环语句等。

第二步:安装Python环境

为了开始Python编程,您需要在自己的电脑上安装Python环境。可以从官方网站下载Python安装包,根据提示进行安装。

第三步:学习Python基本语法

Python的基本语法包括变量、数据类型、运算符、条件判断、循环等。其中,数据类型包括字符串、数字、列表、元组、集合、字典等。条件判断包括if语句和else语句,循环包括for循环和while循环。学习Python语法可以通过阅读教程、练习题、编写程序等方式来掌握。

第四步:学习Python常用库

Python有丰富的库可以进行程序开发,如NumPy、Pandas、Matplotlib、Requests等。通过学习这些库,能够更加高效地开发Python程序。

示例1:Python程序实现五子棋游戏

# 定义棋盘
board = [['+' for x in range(15)] for y in range(15)]

# 判断是否胜利
def check_win(board, row, col, chess):
    n = 0
    '''判断横向五子棋'''
    for i in range(5):
        if (col - i) >= 0 and (col - i + 4) <= 14:
            if board[row][col - i] == chess and board[row][col - i + 1] == chess and board[row][col - i + 2] == chess and board[row][col - i + 3] == chess and board[row][col - i + 4] == chess:
                n += 1

    '''判断纵向五子棋'''
    for i in range(5):
        if (row - i) >= 0 and (row - i + 4) <= 14:
            if board[row - i][col] == chess and board[row - i + 1][col] == chess and board[row - i + 2][col] == chess and board[row - i + 3][col] == chess and board[row - i + 4][col] == chess:
                n += 1

    '''判断左斜向五子棋'''
    for i in range(5):
        if (row - i) >= 0 and (row - i + 4) <= 14 and (col - i) >= 0 and (col - i + 4) <= 14:
            if board[row - i][col - i] == chess and board[row - i + 1][col - i + 1] == chess and board[row - i + 2][col - i + 2] == chess and board[row - i + 3][col - i + 3] == chess and board[row - i + 4][col - i + 4] == chess:
                n += 1

    '''判断右斜向五子棋'''
    for i in range(5):
        if (row - i) >= 0 and (row - i + 4) <= 14 and (col + i) <= 14 and (col + i - 4) >= 0:
            if board[row - i][col + i] == chess and board[row - i + 1][col + i - 1] == chess and board[row - i + 2][col + i - 2] == chess and board[row - i + 3][col + i - 3] == chess and board[row - i + 4][col + i - 4] == chess:
                n += 1
    if n > 0:
        return True
    else:
        return False

# 让用户下棋
def play():
    turn = 'black'
    while True:
        print('轮到%s下棋,请输入坐标(x,y):' % turn)
        col, row = map(int, input().strip().split(','))

        # 判断此位置是否为空
        if board[row - 1][col - 1] != '+':
            print('此位置已有棋子,请重新输入:')
            continue

        if turn == 'black':
            board[row - 1][col - 1] = 'X'
            # 判断是否胜利
            if check_win(board, row - 1, col - 1, 'X'):
                print('X获胜!')
                break
            turn = 'white'
        else:
            board[row - 1][col - 1] = 'O'
            # 判断是否胜利
            if check_win(board, row - 1, col - 1, 'O'):
                print('O获胜!')
                break
            turn = 'black'

        # 打印棋盘
        for i in range(len(board)):
            for j in range(len(board[i])):
                print(board[i][j], end=' ')
            print()

if __name__ == '__main__':
    play()

示例2:使用Requests库获取天气信息

import requests
from bs4 import BeautifulSoup

url = 'https://tianqi.so.com/weather/101010100'

# 发送请求
response = requests.get(url)

# 解析html
soup = BeautifulSoup(response.text, 'html.parser')

# 提取天气信息
temperature = soup.find('div', {'class': 'temperature'}).string
weather = soup.find('div', {'class': 'weather'}).string

# 打印天气信息
print('北京天气:', temperature, weather)