Python程序报错：'int' object does not support item assignment 求助

Hey there! Let's fix that TypeError you're running into. The root cause here is variable name collision—you're using the same name m for two completely different things: your student dictionary and the math marks input, which breaks the code later on.

What's going wrong exactly: #

1. You start by defining m = {} (an empty dictionary meant to store student names and their total marks).
2. Later, you run m = int(input('enter students marks in maths:'))—this overwrites the dictionary m with an integer value (the math score you just input).
3. When you try to do m[a] = t afterward, Python throws an error because you're trying to treat an integer like a dictionary. Integers can't have key-value pairs assigned to them, which is why you see the TypeError: 'int' object does not support item assignment message.

Fixed & Cleaned-up Code #

Here's the corrected version with a unique variable name for math marks, plus some tweaks for readability and proper syntax (your original print statements had broken line breaks that could cause issues):

print('Welcome to the student marklist program')

def display_student_results(student_dict):
    for name, total_marks in student_dict.items():
        if total_marks > 60:
            print(f'Student {name} has got a total of {total_marks} marks and passed with distinction.')
        elif total_marks > 40:
            print(f'Student {name} has got a total of {total_marks} marks and passed with first class.')
        elif total_marks > 20:
            print(f'Student {name} has got a total of {total_marks} marks and passed with second class.')
        else:
            print(f'Student {name} has got a total of {total_marks} marks and failed the exam.')

student_records = {}
while True:
    student_name = input("Enter student's name: ")
    # Use a unique variable name for math marks to avoid overwriting the dictionary
    math_marks = int(input("Enter student's marks in maths: "))
    chem_marks = int(input("Enter student's marks in chemistry: "))
    phys_marks = int(input("Enter student's marks in physics: "))
    cs_marks = int(input("Enter student's marks in computer science: "))
    
    total = math_marks + chem_marks + phys_marks + cs_marks
    student_records[student_name] = total
    
    add_another = input('Want to add another student? Enter yes or no: ').lower()
    if add_another != "yes":
        break

display_student_results(student_records)

Quick Tips for Your Future Coding: #

• Use descriptive variable names (like student_records instead of m, math_marks instead of m)—this makes your code easier to read and avoids silly name collision mistakes.
• Add input validation (e.g., check if the user enters a valid number for marks) to handle invalid inputs gracefully instead of crashing.
• Keep lines of code concise to avoid accidental line-break syntax errors.

内容的提问来源于stack exchange，提问作者Ram Pandey