Write a program in c++/python to analyze EMAIL HEADER

#!/usr/bin/env python

import re

emails = open("input.txt","r") #opens the file to analyze
results = open("op.txt","w") #creates new file for search results

resultsList = [ ]

for line in emails:
    if "From - " in line: #recgonizes the beginning of a email message and adds a linebreak
        newMessage = re.findall(r'\w\w\w\s\w\w\w.*', line)
        if newMessage:
            resultsList.append("\n\t*** EMAIL HEADER DETAILS ***\n")
               
    if "From: " in line:
        address = re.findall(r'[\w.-]+@[\w.-]+', line)
        if address:
            resultsList.append("\n\nFrom : ")
            resultsList.append(address)
            resultsList.append(";")
       
    if "To: " in line:
        if "Delivered-To:" not in line: #avoids confusion with 'Delivered-To:' tag
            address = re.findall(r'[\w.-]+@[\w.-]+', line)
            if address:
                resultsList.append("\n\nTo : ")
               
                for person in address:
                    resultsList.append(person)
                    resultsList.append("; ")
               
    if "Bcc: " in line:
        address = re.findall(r'[\w.-]+@[\w.-]+', line)
        if address:
            resultsList.append("\n\nBcc : ")
            resultsList.append(address)
            resultsList.append(";")
       
    if "Date: " in line:
        address = re.findall(r'\w\w\w\,.*', line)
        if address:    
            resultsList.append("\n\nDate : ")
            resultsList.append(address)
            resultsList.append(";")
       
    if "Subject: " in line:
        address = re.findall(r'[\w\s.-]+[\w.-]+', line)
        if address:
            resultsList.append("\n\nSub : ")
            resultsList.append(address)
       
for result in resultsList:
    results.writelines(result)


emails.close()
results.close()