This is the link to the word list txt file httpsdrivegooglec

This is the link to the word list txt file.
https://drive.google.com/file/d/0B4akmIRkT2AaTDlpY2g5V2doR2c/view?usp=sharing

Your task for this assignment is to write a simple program in Python 2.7 that will extract the words matching the certain patterns defined by the following regular expressions All alphanumeric words with no symbols. (0...9+ | A...Z+ | a...z+)+ Example valid words: hotel\'. laTechl928\' 93894\'. \'zxvylk\' All valid LaTech e-mail addresses, (a...z+ | 0... l+)+@(a., .z+ |0... 1+)+.latech.edu Example valid words: 1234@latech.edu\', narnia@latech.edu\', robl@coes.lalech.edu\' All valid identifier names in C: (_ | A...Z | a...z) (_ | 0... 9+ | A...Z+ | a...z+)* Example valid words: \'_a constant I \', this is_my_variable \' Write only one function that will extract words matching all three regular expressions. The following has been provided: An input file \' input_words.txt\' containing random words. Pass an input file through a command-line. Import \'re\' library Read one word at a time from an input file. Only spaces separate words. Write a function to check whether a word matches any of the defined regular expressions. All matching words must be written in a new line into an \'extracted_words.txt\' file Write comments to document your code appropriately.

Solution

import sys
import re

alpha = re.compile(r\'[a-zA-Z0-9]+\')
email = re.compile(r\'[0-9a-z]+@[0-9a-z]+\\.latech\\.edu\')
identifier = re.compile(r\'^[^\\d\\W]\\w*\\Z\')

def isValidWord(word):
if alpha.match(word):
print \"alpha\"
return True
elif email.match(word):
return True
elif identifier.match(word):
return True
else:
return False

out = open(\"extracted_words.txt\", \"w\")

with open(sys.argv[1], \'r\') as f:
for line in f:
words = line.split()
for word in words:
if isValidWord(word):
out.write(word + \"\ \")

out.close()