Solution for given Question in paper.

exam.py

# Dictionary
dic = {"SECP": "Securities and Exchange Commission Pakistan", "SBP": "State Bank of Pakistan", "FBR": "Federal Board of Revenue", "PCB": "Pakistan Cricket Board", "ISPR": "Inter Services Public Relations"}

# Open file in read mode
fp = open("Lab 8/20B - 084 - SE.txt", "r")

# Empty list to store list of lines 
lst_lines = []

# Get each line of file
for line in fp:

    # Store in list removing the new-line character ('\n')
    lst_lines.append(line.rstrip('\n'))

# Open new file with same name in write mode
fp = open("20B - 084 - SE.txt", "w")

# Iterate through whole list
for i in range(len(lst_lines)):

    # Iterate through each keys inside dictionary
    for item in dic:

        # Check if value of that key matches with ith member of list
        if dic[item] == lst_lines[i]:

            # If YES
            # Check if last member of list (don't add '\n')
            if i == len(lst_lines) - 1:
                line = f"{lst_lines[i]}\t({item})"
                fp.write(line)
                break

            # If not last member of list (add '\n')
            else:
                line = f"{lst_lines[i]}\t({item})\n"
                fp.write(line)
                break

    # If not matches, directly write to the file
    else:
        line = f"{lst_lines[i]}\n"
        fp.write(line)

# Close the file
fp.close()