（調用類）從學生導入學生得到沒有名為學生的模塊的錯誤

Question

讓模塊 Student 工作時遇到問題。

def read_file():

    try:

    """Open file for reading"""

    f = open('StudentData.txt', 'r')

    """Read file line by line in a list: readlines()"""

    contents = f.readlines()
    print(contents)

    """Calculate and print number of lines"""

    numOfLInes = len(contents)

    print("Number of lines in the file: {}".format(numOfLInes))

"""Close 
    File"""

    f.close()

except IOError:

    print("File could not be opened")
read_file()


class Student(object):
      def init(self):
            self.name = 'NoName'
            self.exam1 = 0.0
            self.exam2 = 0.0
            self.finalexam = 0.0
            self.totalScore = 0.0
      def setData(self, name, exam1, exam2, finalexam, totalScore = 0.0):
            self.name = name
            self.exam1 = exam1
            self.exam2 = exam2
            self.finalexam = finalexam
            self.totalScore = totalScore
      def calcFinalScore(self):
            self.totalScore = (self.exam1 + self.exam2 + self.finalexam) / 3
            return self.totalScore

from Student import Student # This line appears to me to be the problem
def write_file():
        try:
               file= open("new.txt", "a")

           print("Enter student name")
           name = input()
           print("Enter score for exam 1 (out of 100)")
           e1 = float(input())
           print("Enter score for exam 2 (out of 100)")
           e2 = float(input())
           print("Enter score for final exam (out of 100)")
           final = float(input())
           student1 = Student()
           student1.setData(name,e1,e2,final)

           score = student1.calcFinalScore()

           file.write(name + " " + str(score))

           file.close()
    except:
           print("File could not be opened")


write_file()
def read_file():

    try:

        """Open file for reading"""

        f = open('StudentData.txt', 'r')

        """Read file line by line in a list: readlines()"""

        contents = f.readlines()
        print(contents)

        """Calculate and print number of lines"""

        numOfLInes = len(contents)

        print("Number of lines in the file: {}".format(numOfLInes))

        """Close File"""

        f.close()

    except IOError:

        print("File could not be opened")
read_file()

Answer 1

您不必導入模塊中已有的實體。 import從不同的模塊或包中導入一些東西。 想象一下這種情況：

-root_directory
--module1 # contains class Student
--module2 # makes use of class Student 

要使其工作，您必須在module2 from module1 import Student中編寫或僅import module1並像這樣使用它： module1.Student 。 但是，當您的代碼在一個模塊中時，您不必費心。 只需刪除該行。

Answer 2

如果您的Student() class 在同一個模塊（文件）中，則無需導入。

如果您的Student() class 位於另一個模塊中，則需要將其保存在與您的write_file() function 模塊相同的目錄中。 需要將其命名為Student.py

如果是這種情況，請在命名模塊時考慮使用小寫名稱。