I need a better understanding on how to answer this question 1 def readfile(filename):234567891011'''Reads the entire contents of a file into a list using the readline:13141516171819202122 if2324252627Args:Returns:list: Each element of this list is a line from the text in the filpassfilename (str): The name of the file to read.def print_list(list_to_print):"''Prints the contents of a list.Args:list to print (list): The list to print.for i, item in enumerate(list_to_print):print(i,':', item, sep="")name'__main__':''Reads and prints a file's contents.pass 9.21 City Search (Part A, Reading a file)In this part, we are going to read data from a file and print its contents. In later parts, we will search through this data.A code template and some text files to test your code is already provided to you. Take a moment to look over them and download the textfiles.Investigate print_listThe function print_list, is given to you. This function prints the contents of a list. It uses the enumerate function that you may not haveseen before: experiment with it in PythonTutor using this starter code. Ask for help with any questions.Implement readfileWrite the function readfile according the specification in its docstring. For example: using the file cities-small.txt, the functionreadfile('cities-small.txt') returns the list['Santa Rosa\n', 'Petaluma\n', 'Rohnert Park\n', 'Windsor\n', 'Healdsburg\n']Note: Notice the trailing newline characters '\n' after each element in the list. We will remove them in the main function later. You do notneed to do anything to strip these out yet.Complete mainFor the main logic, replace pass with logic implementing the following:• Prompt the user for the name of a file to read.• Call the readfile function to retrieve the contents of that file, saving its return value (a list) in some variable (lets call it YourList).• Remove the trailing newline characters from elements of your list by adapting the code belowYourList = [line.rstrip () for line in YourList]• Where rstrip strips whitespace characters from the end of each line.• This code employs a "list comprehension" pattern, discussed elsewhere in our book textbook.Prints the number of lines in the fileCalls the print_list function to print the list (after you removed the trailing newline characters)Sample output when the file provided is cities-small.txtNumber of lines in file: 50: Santa Rosa1: Petaluma2: Rohnert Park.3: Windsor4: Healdsburg

The readfile function is defined to read the entire contents of a file and return a list of…

9.21 City Search (Part A, Reading a file) In this part, we are going to read data from a file and print its contents. In later parts, we will search through this data. A code template and some text files to test your code is already provided to you. Take a moment to look over them and download the text files. Investigate print_list The function print_list, is given to you. This function prints the contents of a list. It uses the enumerate function that you may not have seen before: experiment with it in Python Tutor using this starter code. Ask for help with any questions.

9.21 City Search (Part A, Reading a file) In this part, we are going to read data from a file and print its contents. In later parts, we will search through this data. A code template and some text files to test your code is already provided to you. Take a moment to look over them and download the text files. Investigate print_list The function print_list, is given to you. This function prints the contents of a list. It uses the enumerate function that you may not have seen before: experiment with it in Python Tutor using this starter code. Ask for help with any questions.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

I need a better understanding on how to answer this question

1 def readfile(filename):
2
3
4
5
6
7
8
9
10
11
'''Reads the entire contents of a file into a list using the readline:
13
14
15
16
17
18
19
20
21
22 if
23
24
25
26
27
Args:
Returns:
list: Each element of this list is a line from the text in the fil
pass
filename (str): The name of the file to read.
def print_list(list_to_print):
"''Prints the contents of a list.
Args:
list to print (list): The list to print.
for i, item in enumerate(list_to_print):
print(i,':', item, sep="")
name
'__main__':
''Reads and prints a file's contents.
pass

9.21 City Search (Part A, Reading a file)
In this part, we are going to read data from a file and print its contents. In later parts, we will search through this data.
A code template and some text files to test your code is already provided to you. Take a moment to look over them and download the text
files.
Investigate print_list
The function print_list, is given to you. This function prints the contents of a list. It uses the enumerate function that you may not have
seen before: experiment with it in PythonTutor using this starter code. Ask for help with any questions.
Implement readfile
Write the function readfile according the specification in its docstring. For example: using the file cities-small.txt, the function
readfile('cities-small.txt') returns the list
['Santa Rosa\n', 'Petaluma\n', 'Rohnert Park\n', 'Windsor\n', 'Healdsburg\n']
Note: Notice the trailing newline characters '\n' after each element in the list. We will remove them in the main function later. You do not
need to do anything to strip these out yet.
Complete main
For the main logic, replace pass with logic implementing the following:
• Prompt the user for the name of a file to read.
• Call the readfile function to retrieve the contents of that file, saving its return value (a list) in some variable (lets call it YourList).
• Remove the trailing newline characters from elements of your list by adapting the code below
YourList = [line.rstrip () for line in YourList]
• Where rstrip strips whitespace characters from the end of each line.
• This code employs a "list comprehension" pattern, discussed elsewhere in our book textbook.
Prints the number of lines in the file
Calls the print_list function to print the list (after you removed the trailing newline characters)
Sample output when the file provided is cities-small.txt
Number of lines in file: 5
0: Santa Rosa
1: Petaluma
2: Rohnert Park.
3: Windsor
4: Healdsburg

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