For this system, I am using the window10 system, the version of the python interpreter used: python3.8, it is recommended to write in pycharm
This article will conduct a comprehensive analysis of the student information management system and explain it step by step, hoping to help those in need
Table of contents
Main function program flow chart:
Realize the main function design:
Enter student information (insert function content):
Enter student information program flow chart:
Delete student information (delete function content):
Block diagram of deleting student information:
Modify student information (modify function content):
Modify student information program flow chart:
Find student information (serach function content):
Find Student Information Procedure Flowchart:
Count the total number of students (total function content):
Display student information function (show function content):
Sorting module design (sort function content):
First of all, to make a system, we must first clarify what functions the system should have and what kind of design it needs to carry out.
How to do it for a system:
- demand analysis
- system design
- Necessary for system development
- Main function design
- Student information maintenance module design
- Query/statistics module design
- Sorting module design
- project packaging
Then first conduct a demand analysis on the student information management system:
The functions that the student management system should have:
- Add student and grade information
- Save academic audit information to a file
- Modify and delete student information
- Query student information
- Sort by student grade
- Statistics student total score
After analyzing the needs, sort out the functions that the student information management system should have as above.
Next, the design of the system should be carried out:
system design:
- System function structure
- Seven modules of student information management system
- Enter student information module
- Find Student Information Module
- Delete Student Information Module
- Modify Student Information Module
- Student Achievement Ranking Module
- Statistical Student Headcount Module
- Show all student information modules
Design system flow chart:
Main function design:
Main function program flow chart:
Realize the main function design:
| serial number | Function |
| 0 | Exit system |
| 1 | Enter student information and call the insert() function |
| 2 | Find student information and call the searc() function |
| 3 | To delete student information, call the delete() function |
| 4 | To modify student information, call the modify() function |
| 5 | To rank the students' grades, call the sort() function |
| 6 | To count the total number of students, call the total() function |
| 7 | To display all student information, call the show() function |
code part:
def main():
while True:
menu()
choice=int(input('请选择：'))
if choice in [0,1,2,3,4,5,6,7]:
if choice==0:
answer=input('您确定要退出系统么?y/n')
if answer=='y' or answer=='Y':
print('谢谢您的使用！！！')
break
else:
continue
elif choice==1:
insert()
elif choice==2:
search()
elif choice==3:
delete()
elif choice==4:
modify()
elif choice==5:
sort()
elif choice==6:
total()
else:
show()
def menu():
print('==========================================学生信息管理系统==========================================')
print('-----------------------------------------------功能界面-------------------------------------------')
print('\t\t\t\t\t\t1,录入学生信息')
print('\t\t\t\t\t\t2,查找学生信息')
print('\t\t\t\t\t\t3,删除学生信息')
print('\t\t\t\t\t\t4,修改学生信息')
print('\t\t\t\t\t\t5,排序')
print('\t\t\t\t\t\t6,统计学生总人数')
print('\t\t\t\t\t\t7,显示所有学生信息')
print('\t\t\t\t\t\t0,退出系统')
def insert():
pass
def search():
pass
def delete():
pass
def modify():
pass
def sort():
pass
def total():
pass
def show():
pass
if __name__ == '__main__':
main()Enter student information (insert function content):
Enter student information program flow chart:
code part:
def insert():
student_list=[] #创建学生集合
while True:
id=int(input('请录入学生id（如1001）：'))
if not id:
break
name=input('请输入学生姓名：')
if not name:
break
try:
enligh=int(input('请输入英语成绩：'))
python=int(input('请输入python成绩：'))
java=int(input('请输入Java成绩：'))
except:
print('输入无效，不是整数类型，请重新输入')
continue
#将录入的学生信息保存到字典当中
student={'id':id,'name':name,'enligh':enligh,'python':python,'java':java}
#将学生信息添加到列表当中
student_list.append(student)
answer=input('是否继续添加？y/n\n')
if answer=='y' or answer=='Y':
continue
else:
break
#调用save（）函数
save(student_list)
print('学生信息录入完成！！！！！！！！1')
def save(lst):
try:
stu_txt=open(filename,'a',encoding='utf-8')
except:
stu_txt = open(filename, 'w', encoding='utf-8')
for item in lst:
stu_txt.write(str(item)+'\n')
stu_txt.close()Delete student information (delete function content):
Block diagram of deleting student information:
code part:
def delete():
while True:
student_id=input('请输入要删除的学生id：')
if student_id!='':
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as file:
student_old=file.readlines()
else:
student_old=[]
flag=False #标记是否删除
if student_old:
with open(filename,'w',encoding='utf-8') as wfile:
d={}
for item in student_old:
d=dict(eval(item)) #将字符串转换成字典
if str(d['id'])!=student_id:
wfile.write(str(d)+'\n')
else:
flag=True
if flag:
print(f'id为{student_id}的学生信息已被删除')
else:
print(f'没有找到id为{student_id}')
else:
print('无学生信息')
break
show() # 删除之后显示所有学生信息
answer=input('是否继续删除？y/n\n')
if answer=='y' or answer=='Y':
continue
else:
break
print('删除学生信息完毕！！！')Modify student information (modify function content):
Modify student information program flow chart:
code part:
def modify():
show()
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
stuedent_old=rfile.readlines()
else:
return
student_id=input('请输入修改学生的id：')
with open(filename,'w',encoding='utf-8') as wfile:
for item in stuedent_old:
d=dict(eval(item))
if str(d['id'])==student_id:
print('恭喜找到这名学生的信息，可以修改他的相关信息了！！！')
while True:
try:
d['name']=input('请输入姓名：')
d['english']=input('请输入英语成绩：')
d['python']=input('请输入python成绩：')
d['java']=input('请输入Java成绩')
except:
print('您的输入有误，请重新输入')
else:
break
wfile.write(str(d)+'\n')
print('修改成功')
else:
wfile.write(str(d)+'\n')
answer=input('是否继续修改其他学生的信息？y/n\n')
if answer=='y' or answer=='Y':
modify()Find student information (serach function content):
Find Student Information Procedure Flowchart:
Write the function search() to find student information called in the main function Define the function show_student(query_student) to display the query results
code part:
def search():
student_query=[]
while True:
id=''
name=''
if os.path.exists(filename):
mode=input('按id查找请输入1,按姓名查找请输入2\n')
if mode=='1':
id=input('请输入要查找的id：')
elif mode=='2':
name=input('请输入要查找的姓名：')
else:
print('您的输入有误,请重新输入')
search()
with open(filename,'r',encoding='utf-8') as rfile:
student=rfile.readlines()
for item in student:
d=dict(eval(item))
if id!='':
if d['id']==id:
student_query.append(d)
elif name!='':
if d['name']==name:
student_query.append(d)
#显示查询结果
show_student(student_query)
#清空列表
student_query.clear()
answer=input('是否要继续查询？y/n\n')
if answer=='y' or answer=='Y':
continue
else:
break
else:
print('暂未保存该学生信息')
return
def show_student(lst):
if len(lst)==0:
print('没有查询到学生信息,无数据显示！！！')
return
#定义标题显示格式
format_title='{:^6}\t{:^12}\t{:^8}\t{:^8}\t{:^8}\t{:^8}'
print(format_title.format('id','姓名','英语成绩','python成绩','java成绩','总成绩'))
#定义内容显示格式
format_date='{:^6}\t{:^12}\t{:^8}\t{:^8}\t{:^8}\t{:^8}'
for item in lst:
print(format_date.format(item.get('id'),
item.get('name'),
item.get('english'),
item.get('python'),
item.get('java'),
int(item.get('english'))+int(item.get('python'))+int(item.get('java'))
))Count the total number of students (total function content):
code part:
def total():
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
students=rfile.readlines()
for item in students:
if students:
len(students)
print('一共有{}个学生'.format(len(students)))
else:
print('还没有录入学生信息')
else:
print('暂未保存学生信息')Display student information function (show function content):
code part:
def show():
student_information=[]
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
students=rfile.readlines()
for item in students:
student_information.append(eval(item))
if student_information!=[]:
show_student(student_information)
else:
print('暂未保存学生信息')Sorting module design (sort function content):
code part:
def sort():
show()
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
students=rfile.readlines()
student_new=[]
for item in students:
d=dict(eval(item))
student_new.append(d)
else:
return
asc_or_desc=input('请选择排序方式（0,升序 1,降序）\n')
if asc_or_desc=='0':
asc_or_desc_bool=False
elif asc_or_desc=='1':
asc_or_desc_bool=True
else:
print('您的输入有误，请重新输入')
sort()
mode=input('请选择排序方式（1，按英语成绩排序 2，按python成绩排序 3，按Java成绩排序 0，按总成绩排序）\n')
if mode=='1':
student_new.sort(key=lambda student_new:int(student_new['english']),reverse=asc_or_desc_bool)
elif mode=='2':
student_new.sort(key=lambda student_new: int(student_new['python']), reverse=asc_or_desc_bool)
elif mode=='3':
student_new.sort(key=lambda student_new: int(student_new['java']), reverse=asc_or_desc_bool)
elif mode=='0':
student_new.sort(key=lambda student_new: int(student_new['english'])+int(student_new['python']+int(student_new['java'])), reverse=asc_or_desc_bool)
else:
print('您输入的信息有误，请重新输入')
sort()
show_student(student_new)Full code:
import os
import tarfile
filename='student.txt'
def main():
while True:
menu()
choice=int(input('请选择：'))
if choice in [0,1,2,3,4,5,6,7]:
if choice==0:
answer=input('您确定要退出系统么?y/n\n')
if answer=='y' or answer=='Y':
print('谢谢您的使用！！！')
break
else:
continue
elif choice==1:
insert()
elif choice==2:
search()
elif choice==3:
delete()
elif choice==4:
modify()
elif choice==5:
sort()
elif choice==6:
total()
else:
show()
def menu():
print('==========================================学生信息管理系统==========================================')
print('-----------------------------------------------功能界面-------------------------------------------')
print('\t\t\t\t\t\t1,录入学生信息')
print('\t\t\t\t\t\t2,查找学生信息')
print('\t\t\t\t\t\t3,删除学生信息')
print('\t\t\t\t\t\t4,修改学生信息')
print('\t\t\t\t\t\t5,排序')
print('\t\t\t\t\t\t6,统计学生总人数')
print('\t\t\t\t\t\t7,显示所有学生信息')
print('\t\t\t\t\t\t0,退出系统')
def insert():
student_list=[]
while True:
id=input('请录入学生id（如1001）：')
if not id:
break
name=input('请输入学生姓名：')
if not name:
break
try:
english=int(input('请输入英语成绩：'))
python=int(input('请输入python成绩：'))
java=int(input('请输入Java成绩：'))
except:
print('输入无效，不是整数类型，请重新输入')
continue
#将录入的学生信息保存到字典当中
student={'id':id,'name':name,'english':english,'python':python,'java':java}
#将学生信息添加到列表当中
student_list.append(student)
answer=input('是否继续添加？y/n\n')
if answer=='y' or answer=='Y':
continue
else:
break
#调用save（）函数
save(student_list)
print('学生信息录入完成！！！！！！！！1')
def save(lst):
try:
stu_txt=open(filename,'a',encoding='utf-8')
except:
stu_txt = open(filename, 'w', encoding='utf-8')
for item in lst:
stu_txt.write(str(item)+'\n')
stu_txt.close()
def search():
student_query=[]
while True:
id=''
name=''
if os.path.exists(filename):
mode=input('按id查找请输入1,按姓名查找请输入2\n')
if mode=='1':
id=input('请输入要查找的id：')
elif mode=='2':
name=input('请输入要查找的姓名：')
else:
print('您的输入有误,请重新输入')
search()
with open(filename,'r',encoding='utf-8') as rfile:
student=rfile.readlines()
for item in student:
d=dict(eval(item))
if id!='':
if d['id']==id:
student_query.append(d)
elif name!='':
if d['name']==name:
student_query.append(d)
#显示查询结果
show_student(student_query)
#清空列表
student_query.clear()
answer=input('是否要继续查询？y/n\n')
if answer=='y' or answer=='Y':
continue
else:
break
else:
print('暂未保存该学生信息')
return
def show_student(lst):
if len(lst)==0:
print('没有查询到学生信息,无数据显示！！！')
return
#定义标题显示格式
format_title='{:^6}\t{:^12}\t{:^8}\t{:^8}\t{:^8}\t{:^8}'
print(format_title.format('id','姓名','英语成绩','python成绩','java成绩','总成绩'))
#定义内容显示格式
format_date='{:^6}\t{:^12}\t{:^8}\t{:^8}\t{:^8}\t{:^8}'
for item in lst:
print(format_date.format(item.get('id'),
item.get('name'),
item.get('english'),
item.get('python'),
item.get('java'),
int(item.get('english'))+int(item.get('python'))+int(item.get('java'))
))
def delete():
while True:
student_id=input('请输入要删除的学生id：')
if student_id!='':
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as file:
student_old=file.readlines()
else:
student_old=[]
flag=False #标记是否删除
if student_old:
with open(filename,'w',encoding='utf-8') as wfile:
d={}
for item in student_old:
d=dict(eval(item)) #将字符串转换成字典
if d['id']!=student_id:
wfile.write(str(d)+'\n')
else:
flag=True
if flag:
print(f'id为{student_id}的学生信息已被删除')
else:
print(f'没有找到id为{student_id}')
else:
print('无学生信息')
break
show() # 删除之后显示所有学生信息
answer=input('是否继续删除？y/n\n')
if answer=='y' or answer=='Y':
continue
else:
break
print('删除学生信息完毕！！！')
def modify():
show()
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
stuedent_old=rfile.readlines()
else:
return
student_id=input('请输入修改学生的id：')
with open(filename,'w',encoding='utf-8') as wfile:
for item in stuedent_old:
d=dict(eval(item))
if str(d['id'])==student_id:
print('恭喜找到这名学生的信息，可以修改他的相关信息了！！！')
while True:
try:
d['name']=input('请输入姓名：')
d['english']=input('请输入英语成绩：')
d['python']=input('请输入python成绩：')
d['java']=input('请输入Java成绩')
except:
print('您的输入有误，请重新输入')
else:
break
wfile.write(str(d)+'\n')
print('修改成功')
else:
wfile.write(str(d)+'\n')
answer=input('是否继续修改其他学生的信息？y/n\n')
if answer=='y' or answer=='Y':
modify()
else:
print('修改完毕')
def sort():
show()
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
students=rfile.readlines()
student_new=[]
for item in students:
d=dict(eval(item))
student_new.append(d)
else:
return
asc_or_desc=input('请选择排序方式（0,升序 1,降序）\n')
if asc_or_desc=='0':
asc_or_desc_bool=False
elif asc_or_desc=='1':
asc_or_desc_bool=True
else:
print('您的输入有误，请重新输入')
sort()
mode=input('请选择排序方式（1，按英语成绩排序 2，按python成绩排序 3，按Java成绩排序 0，按总成绩排序）\n')
if mode=='1':
student_new.sort(key=lambda student_new:int(student_new['english']),reverse=asc_or_desc_bool)
elif mode=='2':
student_new.sort(key=lambda student_new: int(student_new['python']), reverse=asc_or_desc_bool)
elif mode=='3':
student_new.sort(key=lambda student_new: int(student_new['java']), reverse=asc_or_desc_bool)
elif mode=='0':
student_new.sort(key=lambda student_new: int(student_new['english'])+int(student_new['python']+int(student_new['java'])), reverse=asc_or_desc_bool)
else:
print('您输入的信息有误，请重新输入')
sort()
show_student(student_new)
def total():
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
students=rfile.readlines()
for item in students:
if students:
print('一共有{}个学生'.format(len(students)))
else:
print('还没有录入学生信息')
else:
print('暂未保存学生信息')
def show():
student_information=[]
if os.path.exists(filename):
with open(filename,'r',encoding='utf-8') as rfile:
students=rfile.readlines()
for item in students:
student_information.append(eval(item))
if student_information!=[]:
show_student(student_information)
else:
print('暂未保存学生信息')
if __name__ == '__main__':
main()Project packaging:
Install third-party modules: 1. Press win+R, enter cmd, open the cmd command interface,
Online installation mode: pip install Pyinstaller
2, perform the packaging operation
pyinstaller -F E:\python基础语法学习\章节十六\system.pyIf you have special needs, please rewrite the code yourself
Seeing this, I believe that you have a deeper understanding of python learning, and I wish you further progress on the road in the future.
I hope it will be helpful for beginners or those in need.
Seeing how hard the editor is working, give me a thumbs up before leaving.