Python代写：COMP1405Files,Functions,andLists

代写Python基础作业，练习Files, Functions, 和Lists的基础用法。

Problem 1 (Student Grades)

For this problem, you will create a grade analysis program in a file called
a3p1.py. When this program runs, it should prompt the user for a specific
filename (you can assume the user input is valid). The program must then read
the specified file and produce a summary of the grades, including: the number
of people who passed the class, the number of people who did not pass the
class, the average of all the final grades within the class and the name/grade
of the students with the highest/lowest grades in the class. The final grade
can be calculated with the following weights: assignment=25%, midterm=25%,
exam=50%. To pass the course, a student must have received a final grade of
50% or greater and a final exam grade of 50% or higher. Several example input
files have been included on the assignment page, along with files summarizing
the expected output.
All files used for this problem will have the following line-by-line
structure:
Student1_first_name
Student1_last_name
Student1_student_number
Student1_assignment_grade
Student1_midterm_grade
Student1_exam_grade
Student2_first_name
Student2_last_name
Student2_student_number
Student2_assignment_grade
Student2_midterm_grade
Student2_exam_grade
…etc…

Problem 2 (Common Multiples)

Write a function called ismultiple which takes 2 integer arguments (a and b).
This function must return True if b is a multiple of a (i.e., a divides into b
evenly) and False otherwise. Write a second function called commonmultiple
which takes 3 integer arguments (a, b, and c). This function must return True
if c is a multiple of both a and b, and False otherwise. Additionally, the
commonmultiple function must use two calls to the ismultiple function to
compute its return value. Once you have implemented both functions, include
testing code that asks the user to enter two numbers (a and b) and prints out
all numbers between 1 and 100 (inclusive) that are common multiples of a and
b. Save your functions and testing code in a file called a3p2.py and add it to
your submission zip file.

Problem 3 (List Slicing Function)

Python provides slicing functionality for lists, but for this question, you
will implement your own function capable of producing list slices (note: you
cannot use the slicing operator in your solution). The function should be
called slice and take the following three arguments in this specific order:

1. A list, source, which the slice will be created from. This list cannot be modified by your function.
2. A positive integer, start, representing the starting index of the slice you will create. If this value is not in the range [0, len(list)-1], your function should return an empty list.
3. A positive integer, end, representing the ending index of the slice you will create. If this value is not in the range [start, len(list)-1], your function should return an empty list.
   If the parameter values are acceptable, your function will return a list that
   contains the items from source beginning at the index start and ending at the
   index end (inclusive). This is different from the Python slice operator, as
   the item at the index end is also included in the new list. Examples:
   mylist = [“A”, “B”, “C”, “D”, “E”, “F”, “G”, “H”, “I”, “J”]
   slice(mylist, 0, 9) should be [“A”, “B”, “C”, “D”, “E”, “F”, “G”, “H”, “I”, “J”]
   slice(mylist, 3, 4) should be [“D”, “E”]
   slice(mylist, 4, 3) should be [ ]
   slice(mylist, 3, 8) should be [“D”, “E”, “F”, “G”, “H”, “I”]
   slice(mylist, 4, 4) should be [“E”]
   —|—
   Save your code is a file called a3p3.py and add it to your submission zip.

Recap

Your zip file should contain your a3p1.py, a3p2.py, and a3p3.py files.
Submit your assignment3.zip file to cuLearn.
Make sure you download the zip after submitting and verify the file contents.