Python user data check -

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i have program gets user's input , asks whether information correct or not. however, when user has finished entering information, error code: 

#welcome print("welcome game!\n")   def data():     #age     age = int(input("enter age: "))     #gender     gen = input("enter gender: ")     #email     mail = input("enter email: ")     #username     name = input("enter name: ")     return (age, gen, mail, name)  def datacheck():     print("your information:\n")     print("age: ", age, "\n")     print("gender: ", gen, "\n")     print("email: ", mail, "\n")     print("username: ", name, "\n")     yn = input("is correct? yes or no: ")     if yn == "yes":         print("hello, ", name)     if yn == "no":         data()         #array variables         age = data[0]         gen = data[1]         mail = data[2]         name = data[3]         #datacheck         datacheck()   data = data()   #array variable. age = data[0] gen = data[1] mail = data[2] name = data[3] #datacheck datacheck()

the error is:

traceback (most recent call last): file "/users/joe/documents/test123.py", line 48, in datacheck() file "/users/joe/documents/test123.py", line 20, in datacheck print("age: ", age, "\n") unboundlocalerror: local variable 'age' referenced before assignment

there no error if type re-entering of info doesn't work:

#welcome print("welcome game!\n")   def data():     #age     age = int(input("enter age: "))     #gender     gen = input("enter gender: ")     #email     mail = input("enter email: ")     #username     name = input("enter name: ")     return (age, gen, mail, name)  def datacheck():     print("your information:\n")     print("age: ", age, "\n")     print("gender: ", gen, "\n")     print("email: ", mail, "\n")     print("username: ", name, "\n")     yn = input("is correct? yes or no: ")     if yn == "yes":         print("hello, ", name)     if yn == "no":         data()         #datacheck         datacheck()   data = data()   #array variable. age = data[0] gen = data[1] mail = data[2] name = data[3] #datacheck datacheck()

how user can re-enter information (data function)?

age, gen, mail, name local variables in both data() , datacheck(), variables scope method belong to. have define variables global or pass variables/tuple object 1 method another.

based on logic, need pass tuple object datacheck(), modify datacheck(tuple), tested follows:

hzhang@dell-work ~/pycharmprojects/test $ cat test.py  #welcome print("welcome game!\n")   def data():     #age     age = int(input("enter age: "))     #gender     gen = input("enter gender: ")     #email     mail = input("enter email: ")     #username     name = input("enter name: ")     return (age, gen, mail, name)   def datacheck(data):     age = data[0]     gen = data[1]     mail = data[2]     name = data[3]      print("your information:\n")     print("age: ", age, "\n")     print("gender: ", gen, "\n")     print("email: ", mail, "\n")     print("username: ", name, "\n")     yn = input("is correct? yes or no: ")     if yn == "yes":         print("hello, ", name)     if yn == "no":         values = data()         #datacheck         datacheck(values)   data = data()  #array variable. age = data[0] gen = data[1] mail = data[2] name = data[3] #datacheck datacheck(data)hzhang@dell-work ~/pycharmprojects/test $ python test.py  welcome game!  enter age: 22 enter gender: "male" enter email: "hi@email.com" enter name: "haifzhan" information:  ('age: ', 22, '\n') ('gender: ', 'male', '\n') ('email: ', 'hi@email.com', '\n') ('username: ', 'haifzhan', '\n') correct? yes or no: "yes"  ('hello, ', 'haifzhan')

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