Python 生成一个包含一个键和多个值的字典。值应该是一个列表

输出如下：

def gen_stu():
    students_names=['venkatesh','kiran','ravi'] # assigning the names of students
    student_marks=[]
    student_names_marks={}
    for i in students_names:
        for m in range(1,3): # asking user for marks for respective students
            student_names_marks[i]=int(input(f'enter the marks of {i} for subject {m}: '))
            student_marks.append(student_names_marks[i])
            student_names_marks[i]=student_marks
    return student_names_marks
print(gen_stu())

我得到的输出是：

enter the marks of venkatesh for subject 1: 1
enter the marks of venkatesh for subject 2: 2
enter the marks of kiran for subject 1: 3
enter the marks of kiran for subject 2: 4
enter the marks of ravi for subject 1: 5
enter the marks of ravi for subject 2: 6

但我需要输出为：

{'venkatesh': [1, 2, 3, 4, 5, 6], 'kiran': [1, 2, 3, 4, 5, 6], 'ravi': [1, 2, 3, 4, 5, 6]}

---

带回向字典添加键的缩进：

{'venkatesh': [1, 2], 'kiran': [3, 4], 'ravi': [5, 6]}

def gen_stu（）：
学生名称=['venkatesh'、'kiran'、'ravi']#指定学生名称
学生分数=[]
学生姓名分数={}
以学生姓名填写的i：
对于范围（1,3）内的m:#向用户询问各自学生的分数
学生姓名分数[i]=int（输入（f'输入科目{m}:'的{i}分数）
学生分数。追加（学生姓名分数[i]）
学生姓名标记[i]=学生标记#返回向字典添加键的缩进：

{'venkatesh': [1, 2], 'kiran': [3, 4], 'ravi': [5, 6]}

def gen_stu（）：
学生名称=['venkatesh'、'kiran'、'ravi']#指定学生名称
学生分数=[]
学生姓名分数={}
以学生姓名填写的i：
对于范围（1,3）内的m:#向用户询问各自学生的分数
学生姓名分数[i]=int（输入（f'输入科目{m}:'的{i}分数）
学生分数。追加（学生姓名分数[i]）
学生姓名分数[i]=学生分数使用
dict.setdefault

Ex:

def gen_stu():
    students_names=['venkatesh','kiran','ravi'] # assigning the names of students
    student_marks=[]
    student_names_marks={}
    for i in students_names:
        for m in range(1,3): # asking user for marks for respective students
            student_names_marks[i]=int(input(f'enter the marks of {i} for subject {m}: '))
            student_marks.append(student_names_marks[i])
        student_names_marks[i]=student_marks  # <------
    return student_names_marks
print(gen_stu())

使用
dict.setdefault

Ex:

def gen_stu():
    students_names=['venkatesh','kiran','ravi'] # assigning the names of students
    student_marks=[]
    student_names_marks={}
    for i in students_names:
        for m in range(1,3): # asking user for marks for respective students
            student_names_marks[i]=int(input(f'enter the marks of {i} for subject {m}: '))
            student_marks.append(student_names_marks[i])
        student_names_marks[i]=student_marks  # <------
    return student_names_marks
print(gen_stu())