UnboundLocalError: local variable 'input' referenced before assignment,Python交流,技术交流,鱼C论坛

swanseabrian 发表于 2022-2-15 20:04:00

UnboundLocalError: local variable 'input' referenced before assignment

不知道哪里的问题
下面是错误代码

Traceback (most recent call last):
File "C:/Users/Administrator/PycharmProjects/pythonProject/osfolderfile/112343455.py", line 100, in <module>
main()
File "C:/Users/Administrator/PycharmProjects/pythonProject/osfolderfile/112343455.py", line 25, in main
insert()                                  #录入学生信息
File "C:/Users/Administrator/PycharmProjects/pythonProject/osfolderfile/112343455.py", line 53, in insert
ffff =input('请输入mtm(如1001):')
UnboundLocalError: local variable 'input' referenced before assignment
"""
---------------------------------
test: rzbbzr
test1: PyCharm
test2: 112343455.py
test3: 2022-02-15 19:49
Pyinstaller -F112343455.py
py转jupyter %load xxxx.py
pip install -i https://pypi.doubanio.com/simple/ 包名
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple +包名
"""
filename='student.txt'
def main():
while True:
   menm()
   choice=int(input("请选择"))
   if choice==0:
         answer=input("您确定要退出系统吗？y/n")
         if answer=='y' or answer=='Y':
            print("谢谢您的使用!!!")
            break                               #退出系统
         else:
            continue
   elif choice==1:
         insert()                                  #录入学生信息
   elif choice==2:
         search()
   elif choice==3:
         delete()
   elif choice==4:
         modify()
   elif choice==5:
         sort()
   elif choice==6:
         total()
   elif choice==7:
         show()
def menm():
print("============学生信息管理系统================")
print("------------功能菜单----------------------")
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.显示所以学生信息------------")
print("\t\t\t\t\t\t0.退出--------------------")
print('-------------------------------------------------------')
def insert():
student_list=[]
while True:
   ffff =input('请输入mtm(如1001):')
   if not ffff:
         break1
   name=input('请输入姓名:')
   if not name:
         break

   try:
         englist=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中
   student={'id':id,'name':name,'english':english,'python':python,'java':java,}
   #将学生信息添加到列表中
   student_list.append(student)
   answer=input=('是否继续添加？y/n\n')
   if answer=='y':
         continue
   else:
         break
   #调用save()函数
   save(student_list)
   print('学生信息录入完毕!!!')
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():
pass
def delete():
pass
def modify():
pass
def sort():
pass
def total():
pass
def show():
pass
if __name__ == '__main__':
main()

isdkz 发表于 2022-2-15 20:06:53

本帖最后由 isdkz 于 2022-2-15 21:00 编辑

第71行input后面多了一个等号

=是赋值，导致input成为了一个局部变量，而非内置函数input了，所以你前面用到input函数的时候，解释器就把它当成了局部变量input，局部变量在定义之前使用，自然就报错了

"""
---------------------------------
test: rzbbzr
test1: PyCharm
test2: 112343455.py
test3: 2022-02-15 19:49
Pyinstaller -F112343455.py
py转jupyter %load xxxx.py
pip install -i https://pypi.doubanio.com/simple/ 包名
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple +包名
"""
filename='student.txt'
def main():
while True:
   menm()
   choice=int(input("请选择"))
   if choice==0:
         answer=input("您确定要退出系统吗？y/n")
         if answer=='y' or answer=='Y':
            print("谢谢您的使用!!!")
            break                               #退出系统
         else:
            continue
   elif choice==1:
         insert()                                  #录入学生信息
   elif choice==2:
         search()
   elif choice==3:
         delete()
   elif choice==4:
         modify()
   elif choice==5:
         sort()
   elif choice==6:
         total()
   elif choice==7:
         show()
def menm():
print("============学生信息管理系统================")
print("------------功能菜单----------------------")
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.显示所以学生信息------------")
print("\t\t\t\t\t\t0.退出--------------------")
print('-------------------------------------------------------')
def insert():
student_list=[]
while True:
   ffff =input('请输入mtm(如1001):')
   if not ffff:
         break                                                                                                 # 这里break多了一个1
   name=input('请输入姓名:')
   if not name:
         break

   try:
         english=int(input('请输入英语成绩:'))                                                    # 这里把english写成了englist
         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中
   student={'id':ffff,'name':name,'english':english,'python':python,'java':java,}                # 这里id改成ffff，因为你前面定义的变量名是ffff，你这里的id会被当成内置函数id()
   #将学生信息添加到列表中
   student_list.append(student)
   answer=input('是否继续添加？y/n\n')                      # 这里把=去掉
   if answer=='y':
         continue
   else:
         save(student_list)
         print('学生信息录入完毕!!!')
         break
   #调用save()函数
   # save(student_list)                # 把这两句放到else语句块里面，因为else里面break了，如果不放到else语句块里，这两句将没有执行的机会
   # print('学生信息录入完毕!!!')
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():
pass
def delete():
pass
def modify():
pass
def sort():
pass
def total():
pass
def show():
pass
if __name__ == '__main__':
main()

ckblt 发表于 2022-2-15 20:11:08

本帖最后由 ckblt 于 2022-2-15 20:16 编辑

"""
---------------------------------
test: rzbbzr
test1: PyCharm
test2: 112343455.py
test3: 2022-02-15 19:49
Pyinstaller -F112343455.py
py转jupyter %load xxxx.py
pip install -i https://pypi.doubanio.com/simple/ 包名
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple +包名
"""
filename = "student.txt"

def main():
while True:
   menm()
   choice = int(input("请选择"))
   if choice == 0:
         answer = input("您确定要退出系统吗？y/n")
         if answer == "y" or answer == "Y":
            print("谢谢您的使用!!!")
            break# 退出系统
         else:
            continue
   elif choice == 1:
         insert()# 录入学生信息
   elif choice == 2:
         search()
   elif choice == 3:
         delete()
   elif choice == 4:
         modify()
   elif choice == 5:
         sort()
   elif choice == 6:
         total()
   elif choice == 7:
         show()

def menm():
print("============学生信息管理系统================")
print("------------功能菜单----------------------")
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.显示所以学生信息------------")
print("\t\t\t\t\t\t0.退出--------------------")
print("-------------------------------------------------------")

def insert():
student_list = []
while True:
   ffff = input("请输入mtm(如1001):")
   if not ffff:
         break
   name = input("请输入姓名:")
   if not name:
         break

   try:
         english = int(input("请输入英语成绩:"))# 单词拼写要正确
         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中
   student = {
         "id": id,
         "name": name,
         "english": english,
         "python": python,
         "java": java,
   }
   # 将学生信息添加到列表中
   student_list.append(student)
   answer = input("是否继续添加？y/n\n")
   if answer == "y":
         continue
   else:
         break
   # 调用save()函数
   save(student_list)
   print("学生信息录入完毕!!!")

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():
pass

def delete():
pass

def modify():
pass

def sort():
pass

def total():
pass

def show():
pass

if __name__ == "__main__":
main()

swanseabrian 发表于 2022-2-15 20:48:19

isdkz 发表于 2022-2-15 20:06
第71行input后面多了一个等号

=是赋值，导致input成为了一个局部变量，而非内置函数input了，所以你前面 ...

为啥提示53行,我去,找半天

isdkz 发表于 2022-2-15 20:53:00

本帖最后由 isdkz 于 2022-2-15 20:57 编辑

swanseabrian 发表于 2022-2-15 20:48
为啥提示53行,我去,找半天

因为你第71行并不会引发错误，但是你第71行会导致第53行出现错误

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UnboundLocalError: local variable 'input' referenced before assignment