基于python实现图书管理系统
本文实例为大家分享了python实现图书管理系统的具体代码，供大家参考，具体内容如下
添加新书
查询
借阅
二次添加新书(读取已有的.xls并修改)
代码：
import xlwt
import xlrd
def read_old_data(row0_len):
try:
filename=".\图书.xls"
old_data = []#读取表格已有内容
data = xlrd.open_workbook(filename)
sheet0 = data.sheet_by_index(0)
nrows = sheet0.nrows #获取该sheet中的有效行数
print("Info:读取到已有数据表格")
print("有效行数：",nrows)
for i in range(nrows):
for j in range(row0_len):
old_data.append(sheet0.cell(i,j).value)
print("共有旧的数据：",len(old_data))
except IOError:
print("Info: 没有找到文件或读取文件失败/n1 =>新建图书.xls文件")
nrows=0
return old_data,nrows
def new_book():
book = []
print_value=("书名","作者","编号","位置","数量")
row0_len=len(print_value)#列数
input_value=''
'''
try:
'''
(old_data,nrows)=read_old_data(row0_len)
#打开存储
book_excel = xlwt.Workbook()
sheet1 = book_excel.add_sheet("books",cell_overwrite_ok=0)
#写入旧数据：
for i in range(nrows):
for j in range(row0_len):
sheet1.write(i,j,old_data[(i*row0_len)+j])
while(1):
print("添加新书")
#输入
for i in range(row0_len):
print("请输入："+print_value[i])
input_value = input()
#判断是否输出
if(input_value == 'q'):
book_excel.save("图书.xls")
return
book.append(input_value)
#保存到硬盘
for i in range(row0_len):
sheet1.write(nrows,i,book[i])
nrows=nrows+1
book=[]#清空book缓存
return
def search():
#打开excel
book_excel = xlrd.open_workbook("图书.xls")
sheet1 = book_excel.sheets()[0]
book_num =sheet1.nrows
#while(1):
#输入书名
bookname = input("请输入书名：")
find_flag=0
#查找
for i in range(book_num):
if(bookname == sheet1.cell_value(i,0)):
if(int(sheet1.cell_value(i,4))>0):
find_flag=1
print("书名：",sheet1.cell_value(i,0))
print("作者：",sheet1.cell_value(i,1))
print("位置：",sheet1.cell_value(i,3))
print("库存（本）：",sheet1.cell_value(i,4))
return
if(find_flag==1):
print("查无此书。")
return
def borrow():
#打开excel
book_excel =xlrd.open_workbook("图书.xls")
sheet1 = book_excel.sheets()[0]
book_num = sheet1.nrows
row0_len=5#5列
while(1):
#输入书名
bookname = input("请输入书名：")
if(bookname == 'q'):
return
#查找
for i in range(0,book_num):
if(bookname == sheet1.cell(i,0).value):
kucun=int(sheet1.cell_value(i,4))
if(kucun>0):
(old_data,nrows)=read_old_data(row0_len)#5列
book_excel_w = xlwt.Workbook("图书.xls")
sheet2 = book_excel_w.add_sheet("books",cell_overwrite_ok=True)
#写入旧数据：
for n in range(nrows):
for j in range(row0_len):
sheet2.write(n,j,old_data[(n*row0_len)+j])
print("借到了！")
sheet2.write(i,4,str(kucun-1))
print("剩余库存：",kucun-1)
book_excel_w.save("图书.xls")
break
return
def main_window():
while(1):
print("\n====图书管理系统====")
print("1.新书加入")
print("2.书籍查询")
print("3.图书借阅")
print("========4退出=======")
x= (input("请输入你的操作"))
print('\n')
if(x == '1'):
new_book()
elif(x=='2'):
search()
elif(x=='3'):
borrow()
elif(x=='4'):
break
else:
print("输入无效")
return
main_window()
