added testpw.py

testpw.py takes password as argument and checks it against
haveibeenpawned or not in a secure way

testpw.py

@@ -0,0 +1,17 @@
+import sys
+import hashlib
+import requests
+
+url="https://api.pwnedpasswords.com/range/"
+hash_object = hashlib.sha1(sys.argv[1].encode("UTF-8"))
+pw_hash=hash_object.hexdigest()
+first_part=pw_hash[:5]
+second_part=pw_hash[5:]
+print(pw_hash)
+print(first_part)
+print(second_part)
+furl="{}{}".format(url,first_part)
+print(furl)
+response=requests.get(furl)
+if second_part.lower() in response.text.lower():
+    print("hash found")