Python 3.x Break语句不'；不要打断for循环

我需要从一个文本文件创建一个嵌套字典，问题是当我需要它只获取内联断点时，内部循环获取了文件中的所有断点，因此我 如果正在读取新行但未中断循环，则添加了break语句。 我在文本文件中尝试了许多其他格式，但问题仍然存在。 python代码：

def create_dictionary(filename):
    units_dict = {}
    courses_dict = {}
    with open(filename) as f:
        for units in f:
            (unit_key, unit_name) = units.split(" : ")
            for course in unit_name.split(", "):
                (course_key, course_name) = course.split(": ")
                courses_dict[course_key] = course_name

                if '\n' in course:
                    break

            units_dict[unit_key] = courses_dict
    return units_dict

文本文件格式：

first : initial1: course name1, initial2: course name2
second : initial3: course name3, initial4: course name4

预期产出：

{first:{initial1: course name1, initial2: course name2},
second:{intial3: course name3, initial4: course name4}}

实际产量：

{first:{initial1: course name1, initial2: course name2, intial3: course name3, initial4: course name4},
second:{initial1: course name1, initial2: course name2, intial3: course name3, initial4: course name4}}

我对python很陌生，所以可能我犯了一个愚蠢的错误，不管怎样，如果你能帮助我，我会非常感激。

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（我在不同的上下文中发布代码有类似的问题）

courses\u dict

将所有内容聚合在一起，最后每个条目都在

units\u dict

中引用同一本词典。试试这个

def create_dictionary(filename):
    units_dict = {}
    with open(filename) as f:
        for units in f:
            (unit_key, unit_name) = units.split(" : ")
            # each entry should have a new dict
            courses_dict = {}
            for course in unit_name.split(", "):
                (course_key, course_name) = course.split(": ")
                courses_dict[course_key] = course_name

                if '\n' in course:
                    break

            units_dict[unit_key] = courses_dict
    return units_dict

---

courses\u dict

将所有内容聚合在一起，最后每个条目都在

units\u dict

中引用同一个词典。试试这个

def create_dictionary(filename):
    units_dict = {}
    with open(filename) as f:
        for units in f:
            (unit_key, unit_name) = units.split(" : ")
            # each entry should have a new dict
            courses_dict = {}
            for course in unit_name.split(", "):
                (course_key, course_name) = course.split(": ")
                courses_dict[course_key] = course_name

                if '\n' in course:
                    break

            units_dict[unit_key] = courses_dict
    return units_dict