python实验报告代写_programs作业代写、代做data课程作业、代写Python实验作业、Python编程设计作业调试...
programs作业代写、代做data课程作业、代写Python实验作业、Python编程设计作业调试
日期：2020-07-23 10:26
Lab 10
Objectives
? Practice with designing your own types with classes
? Practice with creating and using instances of a class (objects)
Getting started
1. Create a new file called lab10.py and open it in your Wing editor
2. Download the provided starter files: student.py and sample input files provided to the same
directory as lab10.py
3. Add documentation for the methods within student.py where it is missing. (ie. type hints and
docstring with purpose and examples)
4. Design the methods within student.py and functions within lab10.py according to
specifications below.
Submission
1. Upload student.py and lab10.py files in CourseSpaces before the deadline.
Grading…
Marks will be awarded for correctness, considering:
? the function signature matches the description given (has the name and arguments EXACTLY as
specified)
? the function has the expected behaviour
? a zero grade will be given for programs with incorrect filenames
? a zero grade will be given for programs who have errors or cannot run with Python 3
and for quality according to software engineering properties such as:
? program structure
o import statements are at the top of the file
o constants defined after import statements with CAPITAL LETTERS
o no test calls are left within the file (it only contains your function definitions)
? documentation
o type hints
o purpose
o examples
? meaningful variable names
? proper use of constants
? use of code constructs (functions, variables, condition statements) to
o eliminate redundant code and redundant computation
o make complex code easier to read
? testing coverage
o you have added an example to cover each boundary case within your program
Method/Function Specifications
Within student.py:
1. Design a method to compare equality of Student instances in student.py. When your
implementation is complete, when an instance of a Student is compared to another Student
using == it should evaluate to True if the sid values of the two Student instances are the same and
False otherwise. NOTE: the header must be exact for the overriding to work correctly. See lecture
examples for help.
2. Design a method called is_grade_above that takes as arguments a self-reference to the Student
instance (self) and an additional argument as a threshold grade. The method should determine
whether the grade of self is above the given threshold grade.
Within lab10.py:
1. Add the necessary imports to your file for testing, type hints and for you student class
2. Design a function called get_students that takes a name of a file and creates and returns a new
list of Students from data in filename where each line of file has a student id and grade separated by
a comma. If the file does not exist or the file is empty the function should return an empty list.
3. Design a function called get_classlist that takes a list of Student instances and creates and
returns a new list of just the student ids of all Student instances in the list.
4. Design a function called count_above that takes a list of Student instances and an additional
argument as a threshold grade. The function should return a count of the number of Student
instances in the list that have a grade above the given threshold grade.
5. Design a function called get_average_grade that takes a list of Student instances and an
additional argument as a threshold grade. The function should calculate and return the average grade
of all Student instances in the list as a floating point number. Your function should assume that the
list is not empty.
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