根据要求编写而成的学生信息管理系统
- 基本功能包含（可依据自己情况增删）：
- 可以将完成过的实验融如本系统，统字符串进度条显示当前的录取进度等
- ｜ １）添加学生信息 ｜
- ｜ ２）显示所有学生的信息 ｜
- ｜ ３）删除学生信息 ｜
- ｜ ４）修改学生信息 ｜
- ｜ ５）按学生外出次数高－低显示学生信息 ｜
- ｜ ６）按学生外出次数低－高显示学生信息 ｜
- ｜ ７）按学生所在地确诊人员数高－低显示学生信息 ｜
- ｜ ８）按学生所在地确诊人员数低－高显示学生信息 ｜
- ｜ ９）保存学生信息到文件（students.txt) ｜
- ｜ 10）从文件中读取数据（students.txt) ｜
- ｜ 退出：其他任意按键＜回车＞ ｜
- 学生信息包含但不限与：学号，姓名，外出次数，当地确诊数，录入时间等
student_info.py
import time
def meun():
menu_info = '''＋－－－－－－－－－－－－－－－－－－－－－－＋
｜ １）添加学生信息 ｜
｜ ２）显示所有学生的信息 ｜
｜ ３）删除学生信息 ｜
｜ ４）修改学生信息 ｜
｜ ５）按学生外出次数高－低显示学生信息 ｜
｜ ６）按学生外出次数低－高显示学生信息 ｜
｜ ７）按学生所在地确诊人数高－低显示学生信息 ｜
｜ ８）按学生所在地确诊人数低－高显示学生信息 ｜
｜ ９）保存学生信息到文件（students.txt) ｜
｜ １０）从文件中读取数据（students.txt) ｜
｜ 退出：其他任意按键＜回车＞ ｜
＋－－－－－－－－－－－－－－－－－－－－－－＋
'''
print(menu_info)
#以下二个函数用于sorted排序， key的表达式函数
def wbjd():
scale = 50
print("执行开始".center(scale//2,"-"))
start = time.perf_counter()
for i in range(scale +1):
a = '*' * i;
b= '.'*(scale - i)
c = (i/scale)*100
dur = time.perf_counter() - start
print("\r{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,dur),end="")
time.sleep(0.1)
print("\n"+"执行结束".center(scale//2,'-'))
def get_outgotimes(*a):
for i in a:
return i.get("outgotimes")
def get_people(*a):
for i in a:
return i.get("people")
# 1)添加学生信息
def add_student_info():
L = []
while True:
sid = input("请输入学号:")
if not sid: #学号为空跳出循环
break
n = input("请输入姓名:")
if not n: #名字为空，跳出循环
break
try:
a = int(input("请输入外出次数:"))
s = int(input("请输入所在地确诊人数:"))
except:
print("输入无效，请输入整数....重新录入信息")
continue
t = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
info = {"id":sid,"name":n,"outgotimes":a,"people":s,"intimes":t}
L.append(info)
print("学生信息录入完毕！！！")
return L
# 2)显示所有学生的信息
def show_student_info(student_info):
if not student_info:
print("无数据信息......")
return
print("学号".center(12),"姓名".center(8),"外出次数".center(8),"确诊人数".center(8),"录入时间".center(30))
for info in student_info:
print(info.get("id").center(12),info.get("name").center(8),str(info.get("outgotimes")).center(8),str(info.get("people")).center(8),info.get("intimes").center(30))
# 3) 删除学生信息
def del_student_info(student_info,del_name = ''):
if not del_name:
del_name = input("请输入删除的学生姓名：")
for info in student_info:
if del_name == info.get("name"):
print("学生信息即将被删除或更新")
return info
raise IndexError("学生信息不匹配,没有找到%s" %del_name)
# 4) 修改学生信息
def mod_student_info(student_info):
mod_name = input("请输入修改的学生姓名:")
for info in student_info:
if mod_name == info.get("name"):
m = input("请输入学号:")
if not m:
break
a = int(input("请输入外出次数:"))
s = int(input("请输入所在地确诊人数:"))
t = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
info = {"id":m,"name":mod_name,"outgotimes":a,"people":s,"intimes":t}
return info
raise IndexError("学生信息不匹配，没有找到%s"%mod_name)
# 5) 按学生外出次数高—低显示学生信息
def outgotimes_reduce(student_info):
print("按学生外出次数高—低显示:")
mit = sorted(student_info,key = get_outgotimes,reverse = True)
show_student_info(mit)
# 6) 按学生外出次数低—高显示学生信息
def outgotimes_rise(student_info):
print("按学生外出次数低—高显示:")
mit = sorted(student_info,key = get_outgotimes)
show_student_info(mit)
# 7) 按照学生所在地确诊人数高—低显示学生信息
def people_reduce(student_info):
print("按学生所在地确诊人数高－低显示学生信息：")
mit = sorted(student_info ,key = get_people,reverse = True)
show_student_info(mit)
# ８）按学生所在地确诊人数低—高显示学生信息
def people_rise(student_info):
print("按学生所在地确诊人数低—高显示学生信息")
mit = sorted(student_info ,key = get_people)
show_student_info(mit)
# ９）保存学生信息到文件（students.txt)
def save_info(student_info):
try:
students_txt = open("students.txt","w") # 以写模式打开，并清空文件内容
except Exception as e:
students_txt = open("students.txt", "x") # 文件不存在，创建文件并打开
for info in student_info:
students_txt.write(str(info)+"\n") # 按行存储，添加换行符
students_txt.close()
# １０）从文件中读取数据（students.txt)
def read_info():
old_info = []
try:
students_txt = open("students.txt")
except:
print("暂未保存数据信息") # 打开失败，文件不存在说明没有数据保存
return
while True:
info = students_txt.readline()
if not info:
break
#print(info)
info = info.rstrip() # 去掉换行符
# print(info)
info = info[1:-1] # 去掉｛｝
# print(info)
student_dict = {} # 单个学生字典信息
for x in info.split(","): # 以，为间隔拆分
# print(x)
key_value = [] # 开辟空间，key_value[0]存key,key_value[0]存value
for k in x.split(":"): # 以：为间隔拆分
k = k.strip() # 去掉首尾空字符
# print(k)
if k[0] == k[-1] and len(k) > 2: # 判断是字符串还是整数
key_value.append(k[1:-1]) # 去掉 首尾的＇
else:
key_value.append(str(k))
# print(key_value)
student_dict[key_value[0]] = key_value[1] # 学生信息添加
# print(student_dict)
old_info.append(student_dict) # 所有学生信息汇总
students_txt.close()
return old_info
def main():
student_info = []
while True:
wbjd()
# print(student_info)
meun()
number = input("请输入选项：")
if number == '1':
student_info = add_student_info()
elif number == '2':
show_student_info(student_info)
elif number == '3':
try:
student_info.remove(del_student_info(student_info))
except Exception as e:
# 学生学号不匹配
print(e)
elif number == '4':
try:
student = mod_student_info(student_info)
except Exception as e:
# 学生学号不匹配
print(e)
else:
# 首先按照根据输入信息的名字，从列表中删除该生信息，然后重新添加该学生最新信息
student_info.remove(del_student_info(student_info,del_name = student.get("name")))
student_info.append(student)
elif number == '5':
outgotimes_reduce(student_info)
elif number == '6':
outgotimes_rise(student_info)
elif number == '7':
people_reduce(student_info)
elif number == '8':
people_rise(student_info)
elif number == '9':
save_info(student_info)
elif number == '10':
student_info = read_info()
else:
break
input("回车显示菜单")
main()
