Answer:
#section 1
text = input('Enter file name: ')
with open(text,'r') as file:
data = []
for line in file:
data.append(line.strip())
print('The number of lines in the file is:', len(data))
#section 2
while True:
lnum = int(input('Enter line number: '))
if lnum == 0:
break
else:
num = lnum - 1
print(data[num])
Explanation:
The programming language used is python
# section 1
In this section, the program prompts the user to enter the name of the text file, it then takes the file and opens it with a WITH statement, that allows files to be automatically closed, when they are no longer in use.
An empty list is initialized to hold the lines contained in the text file.
A FOR loop is used with an append method to scan through the file and append its contents to the empty list. The .strip() method is used to eliminate special characters line \t and \n, that may appear when reading the items of the file to the list.
Lastly, in this section number of lines is printed using the len() method.
#section 2
In this section, a WHILE loop is created that will continue to run untill the user inputs 0. The loop prompts the user to enter a line number and prints that number to the screen.
I have attached the result as an image.
This program illustrates the use of files and file manipulations in Python.
File manipulations include reading and writing from a file.
The program in Python, where comments are used to explain each line is as follows:
#This gets input for the file name
fname = input("Filename: ")
#This opens the file for read operations
with open(fname,'r') as file:
#This initializes a list
content = []
#The following for loop reads each line of the file
for line in file:
#This appends each line of the file to the content list
content.append(line.strip())
#This prints the number of lines in the file
print("There are",len(content),"lines in this file")
#The following loop is repeated until the user inputs 0, or less as line number
while True:
#This gets input for the line number
lineNum = int(input('Line number: '))
#If input is 0 or less, this terminates the program
if lineNum <= 0:
break
#If otherwise, the content on that line is printed
else:
print(data[lineNum-1])
As an illustration
Read more about similar programs at:
https://brainly.com/question/15684819
