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COMP1012 Assignment 2

Tips:

1.You can open this "ipynb"file using VSCode.You may need to download Jupyter extension.

2.You should read the requirements carefully and complete the codes in specific parts.You should not modify any other content except your codes.

3.Assignment2's deadline is October 20.Please submit your codes in time.No delay is allowed.

AutoGrading:

1.YOU MUST NAME YOUR NOTEBOOK USING ONLY YOUR  STUDENT  NUMBER(e.g., 24018121r.ipynb).OTHERWISE AUTOGRADING WILL NOT WORK.

2.You can only write your codes in the specific code cells and within a certain range.Write all the codes in a single function and return the final result.

3.You can not modify the function names and parameters.

4.You better not modify anything related to otter and grader.check(...).

5.You can test and print the results in the test cell when writing your assignment,but make sure that the solution code in the specific code cells does not contain any print statements.

6.Violating the above rules may lead to unpredictable results,such as a 0 mark.

Question 1(25pts)

Create a program with a function called compare_digit_sums(s).This function takes a string  s as its parameter.If s can be converted to a floating-point number,the function returns the integer part (int)of the number if the sum of the digits in the integer part is less than or equal to the sum of the digits in the fractional part.If the sum of the digits in the integer part is greater,it returns the fractional part.If s cannot be converted to a floating-point number,it returns "Invalid input".

Requirements

1.The functionality of the program and function should be correct.

2.You should implement the function compare_digit_sums.

Assumptions

1.We  assume that the input string consists solely of eleven specific characters:0,1,2, 3,4,5,6,7,8,9 and  .when calling the function.Situations involving other characters  in  s,such as a6 or le5,are not considered.

Question2(25pts)

Design a function get_passenger_list.This function has three parameters:

• existing_passengers   :it  is  a  list  representing  the  names  of  passengers  currently  on board.
• boarding_passengers  :it  is  a  list  representing  the  names  of passengers  boarding  at  this station.
• alighting_passengers  :it  is  a  list  representing  the  names  of  passengers  alighting  at  this station.

It is used to predict the list of passengers on the train after it has passed through a station. Importantly,the function can be invoked without specifying values for the boarding_passengers(or alighting_passengers  )parameters  when  no passengers board (or alight)at a station.If a passenger in the alighting_passengers is not found in the existing_passengers  ,the  function  returns  the string 'Invalid  input'.Otherwise,it  returns  a list of passenger names on board,sorted in ascending order.Question3(25pts)

Create a function called  find_longest_word_length . This function takes a paragraph as input  and  calculates  the length  of  the longest  word   in  the   paragraph.The  paragraph will contain only letters(both   uppercase  and lowercase)and four  non-letter   characters:newline (\n),period(.),comma(,),and space().These  characters separate words.The  function returns  the  length  of  the  longest  word.

Question4 (25pts)

It is used to predict the list of passengers on the train after it has passed through a station. Importantly,the function can be invoked without specifying values for the boarding_passengers(or    alighting_passengers    )parameters     when    no    passengers board (or alight)at a station.If a passenger in the alighting_passengers is not found in the existing_passengers  ,the  function  returns   the  string  'Invalid  input'.Otherwise,it  returns   a list of passenger names on board,sorted in ascending order.