Find strings and subtring from the wordlist

i have test.txt file, Find strings and subtring from the wordlist

<aardwolf>
<Aargau>
<Aaronic>
<aac>
<akac>
<abaca>
<abactinal>
<abacus>  

test.py file

import sys  # the sys module
import os
import re
def hasattr(str,list):
    expr = re.compile(str)
    # yield the elements
    return [elem for elem in list if expr.match(elem)]

isword = {}
FH = open(sys.argv[1],'r',encoding="ISO-8859-1")
for strLine in FH.readlines():  isword.setdefault(''.join(sorted(strLine[1:strLine.find('>')].upper())),[]).append(strLine[:-1])
print (isword)
basestring=str()
for ARGV in sys.argv[2:]:
    print ("\n*** %s\n" %ARGV )#print Argv

diffpatletters = re.compile(u'[a-zA-Z]').findall(ARGV.upper())
#print (diffpatletters)
diffpat = '.*' + '(.*)'.join(sorted(diffpatletters)) + '.*'
#print (diffpat)
for KEY in hasattr(diffpat,isword.keys()):
#       print (KEY)
       SUBKEY = KEY
       for X in diffpatletters:
         #print (X)
         SUBKEY1 = SUBKEY.replace(X,'')
          #print (SUBKEY)
       if SUBKEY1 in isword:
           #print (SUBKEY)
           basestring+=  "%s -> %s" %(isword[KEY], isword[SUBKEY1])
print (basestring + "\n")

Below is to run the file in command line

python test.py test.txt  aack aadfl

Expected out is find the matched the string and sub-string of each after second argument.My basestring not printing

from Find strings and subtring from the wordlist