Question

Python program

Answer 1

Answer:

The function in Python is as follows:

def search_file(filename,mystring):

my_dict = {}

count = 0

file = open(filename)

lines = file.readlines()

for line in lines:

 count+=1

 if mystring.lower() in line.lower():

  my_dict[count] = line.rstrip('\n')

return my_dict

Explanation:

This defines the function

def search_file(filename,mystring):

This initializes an empty dictionary

my_dict = {}

This initializes the number of lines to 0

count = 0

This opens the file

file = open(filename)

This reads the lines of the file

lines = file.readlines()

This iterates through the lines

for line in lines:

This increments the number line

 count+=1

This checks if the string exists in the line

 if mystring.lower() in line.lower():

If yes, the line number and the string are added to the dictionary

  my_dict[count] = line.rstrip('\n')

This returns the dictionary

return my_dict