118 lines
3.7 KiB
Python
118 lines
3.7 KiB
Python
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# 第十周
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# 例题
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# SQLite连接方式
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# import sqlite3
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# conn = sqlite3.connect("数据库.db")
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# mysql连接方式
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# pip install pymysql --trusted-host mirrors.aliyun.com
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# import pymysql
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# conn = pymysql.connect(host='localhost',
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# port=3306,
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# user='username',
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# password='password',
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# db='database',
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# charset='utf8')
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# sql server连接方式
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# pip install pymssql --trusted-host mirrors.aliyun.com
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# import pymssql
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# conn = pymssql.connect(server='localhost',
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# user='username',
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# password='password',
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# database='database')
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# import xlrd
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# import pymysql
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# def read_excel(file_name):
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# wb = xlrd.open_workbook(file_name)
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# sheet = wb.sheet_by_index(0)
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# schools = []
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# for row in range(1, sheet.nrows):
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# school = []
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# for col in range(sheet.ncols):
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# school.append(sheet.cell_value(row,col))
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# schools.append(school)
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# return schools
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# def insert_data(schools):
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# conn = pymysql.connect(host='localhost',
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# port=3306,
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# user='root',
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# password='123456',
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# database='test',
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# charset='utf8')
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# cursor = conn.cursor()
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# insert_sql = """
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# insert into school(school_code, school_name, province, is_985, is_211, is_self_marking, school_type)
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# values (%s, %s, %s, %s, %s, %s, %s)
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# """
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# for school in schools:
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# cursor.execute(insert_sql, school)
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# conn.commit()
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# cursor.close()
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# conn.close()
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#
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# school_datas = read_excel("school.xls")
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# insert_data(school_datas)
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# # 课后练习
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# 已知某个班级的某次考试成绩信息包括学号、语文、数学、英语、总分，
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# 该成绩信息保存在一张Excel表中，部分信息如图所示，现在要求将其读入到数据库中去。同时实现以下功能：
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# # 创建数据表score, 读取excel中数据到数据库表中
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# import xlrd
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# import sqlite3
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# def read_excels(file_name): #读取Excel文件
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# wb = xlrd.open_workbook(file_name) #打开Excel文件，返回的是一个工作簿
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# sheet = wb.sheet_by_index(0) #由工作簿得到表单
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# students = [] #由行和列来获取文件中的信息，用列表students保存
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# for row in range(1, sheet.nrows):
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# student = []
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# for col in range(sheet.ncols):
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# student.append(transform(sheet.cell_value(row, col)))
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# students.append(student)
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# return students
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# #
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# def transform(data): # 返回的成绩是浮点数，尝试转换成整型
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# try:
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# return int(data)
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# except: # 不能转换原样返回
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# return data
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# #
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# def init_db(): # 新建数据库
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# pass
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# def insert(students): # 插入数据
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# pass
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# init_db() # 调用函数新建数据库
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# students = read_excels("学生成绩表.xls") # 调用函数插入数据
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# insert(students)
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#
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# 格式化输出
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# def print_data(datas): # 打印结果
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# print("{:^8}{:^8}{:^8}{:^8}{:^8}".format("num", "chinese", "math", "english", "total"))
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# for data in datas:
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# print("{:^8}{:^8}{:^8}{:^8}{:^8}".format(data[0], data[1], data[2], data[3], data[4]))
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#
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# # 1.按照总分排序
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# # 2.获取所有存在不及格科目的学生记录
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# # 3.获取指定科目的最高分、最低分以及平均分
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# # 4.查询三科都及格的学生信息
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# # 5.将所有学生的数学成绩都加5分
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# # 6.删除语文不及格的学生记录，并打印删除了多少条记录
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