Question

我有2个JSON文件。带有学生编号的1个文件和带有学生编号的1个文件。

我有一个词典列表，其中包含姓名，电子邮件和学生人数。

我想做的是，如果有60个学生，我想给他们一个唯一的学生编号。该部分在elif语句中起作用。我不知道如何实现的部分是：

如果有20个学生，我想给2个学生提供相同的学生号（听起来很愚蠢，但我需要）。在这种情况下，学生是关键，而学生号是值。

我现在所拥有的：


# student
[{"Student1":029182,"e-mail":"example@.com"},{"Student2":0591238,"e-mail":"example@.com"},{"Student3":9213189,"e-mail":"example@.com"}]



studentnumbers = [{"studentnumber":"029182","ID":0},{"studentnumber":"0591238","ID":1},{"studentnumber":"9213189","ID":2}]

students = [list(data.values())[0] for data in studentnumbers]


ID = 0
# students is a list of studentnumbers
if len(students) <= 20:
    # studentInfo is my dictionary with the key and values
    for data in studentnumbers:
        try:
            pass

        except IndexError:
            pass



elif len(students) <= 60:
    for data in studentnumbers:
        try:   
            studentnumbers[ID] = students[ID]
            ID += 1
            break
        except IndexError:
            pass
    print("..")
else:
    print("...")

with open('Students.json','w') as instudent:
    json.dump(studentnumbers,instudent,indent=2)

输出我现在所拥有的：

[{"Student1":029182,"e-mail":"example@.com","studentnumber":029182},
{"Student2":0591238,"e-mail":"example@.com","studentnumber":9213189},
{"Student3":9213189,"e-mail":"example@.com","studentnumber":0591238},
{"Student4":9213189,"e-mail":"example@.com","studentnumber":0294832},
{"Student5":9213189,"e-mail":"example@.com","studentnumber":0591823},
{"Student6":9213189,"e-mail":"example@.com","studentnumber":0501852}]

我想要什么：

[{"Student1":029182,"e-mail":"example@.com","studentnumber":029182},
{"Student2":0591238,"e-mail":"example@.com","studentnumber":029182},
{"Student3":9213189,"e-mail":"example@.com","studentnumber":029182},
{"Student4":9213189,"e-mail":"example@.com","studentnumber":9213189},
{"Student5":9213189,"e-mail":"example@.com","studentnumber":9213189},
{"Student6":9213189,"e-mail":"example@.com","studentnumber":9213189}]

Answer 1

您似乎想有条件地更新字典列表。

给出

import random


students = [
    {"Student1": "029182", "e-mail": "ex@mail.com"},
    {"Student2": "0591238", "e-mail": "ex@mail.com"},
    {"Student3": "9213189", "e-mail": "ex@mail.com"},
]

代码

def get_unique_numbers(size=10):
    """Return an a list of unique random values."""
    return random.sample(range(10000, 99999), size)


def update(students):
    """Return a list of updated dicts."""
    n = len(students)

    # Conditionally, generate student numbers
    if n <= 20:
        student_numbers = [students[0]["Student1"]] * n
    elif 20 < n <= 60:
        student_numbers = get_unique_numbers(n)

    # Update dicts w/student numbers
    return [{**d, "student_num": n} for d, n in zip(students, student_numbers)]

演示

一小部分学生（n <= 20）返回具有相同学生编号的字典：

update(students)
# [{'Student1': '029182', 'e-mail': 'ex@mail.com', 'student_num': '029182'},
#  {'Student2': '0591238', 'e-mail': 'ex@mail.com', 'student_num': '029182'},
#  {'Student3': '9213189', 'e-mail': 'ex@mail.com', 'student_num': '029182'}]

更大的列表（n > 20）返回带有随机学生编号的字典*：

update(students * 7)
# {'Student1': '029182', 'e-mail': 'ex@mail.com', 'student_num': 28308},
# {'Student2': '0591238', 'e-mail': 'ex@mail.com', 'student_num': 21986},
# {'Student3': '9213189', 'e-mail': 'ex@mail.com', 'student_num': 36603},
# ...
# {'Student1': '029182', 'e-mail': 'ex@mail.com', 'student_num': 38362},
# {'Student2': '0591238', 'e-mail': 'ex@mail.com', 'student_num': 99305},
# {'Student3': '9213189', 'e-mail': 'ex@mail.com', 'student_num': 78360}

^{**注：随心所欲地实现随机数生成器。这将从样本总体中返回随机整数。}

Answer 2

我个人不喜欢使用字典，我只是认为类对象更方便，尽管在大规模上可能更慢。

我不确定您的问题是什么，我不知道字典中不能有两个相同价值的东西。

这是我要怎么做

import random as r

class student():
    def __init__(self,ID,numb):
        self.number = ID
        self.email = 'example@mail.com'
        self.name = 'student{}'.format(numb)

students = []
for i in range(60):
    x = student(r.randint(10000,99999),i)
    students.append(x)
def test():
    ID = 0
    for i in list(students):
        print(i.name,i.number,i.email)

test()

如果要设置学生编号，只需更改r.randint位

希望它对您必须使用字典有帮助或者如果您有任何问题，请询问：）

Answer 3

下面的代码可能会有所帮助。我必须弄清楚您不能使用像025这样的int数字。所以我将其更改为字符串。

# student numbers
studentNunbers = [{"studentnumber": '029182', "ID": 0}, {"studentnumber": '0591238',"ID": 1},{"studentnumber": '9213189', "ID":2}]
# student
studentInfos = [{"Student1":'029182', "e-mail":'example@.com'}, {"Student2":'0591238',"e-mail":'example@.com'},
                {"Student3":'9213189',"e-mail":'example@.com'}, {"Student3":'92189',"e-mail":'example@.com'},
                {"Student2":'0538',"e-mail":'example@.com'}, {"Student2":'238',"e-mail":'example@.com'},
                {"Student2":'0598',"e-mail":'example@.com'}, {"Student2":'08',"e-mail":'example@.com'},]

students = [list(data.values())[0] for data in studentNunbers]

def merge(numRep=1):
    key = "studentnumber"
    stNumberIndex = 0
    iterInd = numRep
    for i in range(len(studentInfos)):
        value = studentNunbers[stNumberIndex][key]
        studentInfos[i][key] = value

        iterInd -= 1
        if iterInd == 0:
            iterInd = numRep
            stNumberIndex += 1

def test():
    if len(studentNunbers) < 20:
        merge(numRep=3)

    elif len(studentNunbers) < 60:
        merge(numRep=1)
    else:
        pass

test()
print(studentInfos)

如何在字典中的不同键中添加相同的值？

3 个答案: