Python初学者-TypeError：“ str”对象不可调用

Question

Total beginner question, from what I can gather I've managed to assign a string incorrectly, but I can't see where I've gone wrong.

Any help would be appreciated, code below:

students = []

def add_student(name, student_id):
    student = {"name": name, "student_id": student_id}
    students.append(student)

while 1 == 1:
try:
    add_student = input("Do you wish to enter the name of a Student (Yes/No)?")
    if add_student == "Yes":
        student_name = input("Enter student name: ")
        print(student_name)
        student_id = input("Enter student ID: ")
        print(student_id)
        print(student_name + ' ' + student_id)
        add_student(student_name, student_id)
        print(student_name+' '+student_id)
        print(*students)
    elif add_student == "No":
        break
    else:
        print("Invalid answer 1")
except KeyError:
    print("Invalid answer 2")

print(*students)

Answer 1

You've called the function def add_student(...) and the variable add_student = ... . How is the interpreter supposed to know you want the function when the variable is called that?

In fact, you've overwitten the function. By the time you call it, it no longer exists. Rename the variable or function to something else. I'll let the comments help you with certain other issues (global lists...) in your code.

Answer 2

your function and local variable name same

students = []

def add_student_data(name, student_id):
    student = {"name": name, "student_id": student_id}
    students.append(student)

while 1 == 1:
try:
    add_student = input("Do you wish to enter the name of a Student (Yes/No)?")
    if add_student == "Yes":
        student_name = input("Enter student name: ")
        print(student_name)
        student_id = input("Enter student ID: ")
        print(student_id)
        print(student_name + ' ' + student_id)
        add_student_data(student_name, student_id)
        print(student_name+' '+student_id)
        print(*students)
    elif add_student == "No":
        break
    else:
        print("Invalid answer 1")
except KeyError:
    print("Invalid answer 2")

print(*students)

Answer 3

The name of the method def add_student(name, student_id) and the name of the variable add_student = input("Do you wish to enter the name of a Student (Yes/No)?") is the same.

It exist a similar question here .

You have to change the name of one of then.

students = []


def add_student(name, student_id):
    student = {"name": name, "student_id": student_id}
    students.append(student)


while 1 == 1:
    try:
        user_respond = raw_input("Do you wish to enter the name of a Student (Yes/No)?")
        if user_respond == "Yes":
            student_name = raw_input("Enter student name: ")
            print(student_name)
            student_id = raw_input("Enter student ID: ")
            print(student_id)
            print(student_name + ' ' + student_id)
            add_student(student_name, student_id)
            print(student_name + ' ' + student_id)
            print(students)
        elif user_respond == "No":
            break
        else:
            print("Invalid answer 1")
    except KeyError:
        print("Invalid answer 2")

print(students)