From 619b59ee9f66aaa2d141e4895bb830c969cefac5 Mon Sep 17 00:00:00 2001
From: mindm <maindi66@gmail.com>
Date: Fri, 13 Jan 2017 12:26:47 +0200
Subject: [PATCH] [Python] challenge 12 (Unreviewed)

---
 challenge_12/python/mindm/README.md          | 11 ++++++
 challenge_12/python/mindm/src/compression.py | 35 ++++++++++++++++++++
 challenge_12/python/mindm/src/test.py        | 29 ++++++++++++++++
 3 files changed, 75 insertions(+)
 create mode 100644 challenge_12/python/mindm/README.md
 create mode 100644 challenge_12/python/mindm/src/compression.py
 create mode 100644 challenge_12/python/mindm/src/test.py

diff --git a/challenge_12/python/mindm/README.md b/challenge_12/python/mindm/README.md
new file mode 100644
index 000000000..3e1406140
--- /dev/null
+++ b/challenge_12/python/mindm/README.md
@@ -0,0 +1,11 @@
+# Challenge_12
+## Compression and Decompression I
+These methods handle string compression and decompression.
+The input can contain any characters but only alphabethicals are compressed.
+
+These methods use re-library, which is a builtin.
+
+You can run tests with:
+```
+$ python3 test.py
+```
\ No newline at end of file
diff --git a/challenge_12/python/mindm/src/compression.py b/challenge_12/python/mindm/src/compression.py
new file mode 100644
index 000000000..0237795ab
--- /dev/null
+++ b/challenge_12/python/mindm/src/compression.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+import re
+
+
+def sub_com(matchobj):
+    """ Calculates the compressed string from the first letter of the match
+        and the length of the match
+    """
+    letter = matchobj.group(0)[0]
+    length = len(matchobj.group(0))
+    return "{}#{}".format(letter, length)
+
+
+def sub_def(matchobj):
+    """ Decompresses the match by multiplying the first character by the
+        digit after the hash character
+    """
+    letter = matchobj.group(0)[0]
+    length = int(matchobj.group(0)[2:])
+    return "{}".format(letter * length)
+
+
+def compress(input):
+    """ Compresses string using 're'-library
+    """
+    out = re.sub(r'(.)\1\1\1+', sub_com, input)
+    return out
+
+
+def decompress(input):
+    """ Decompresses string using 're'-library
+    """
+    out = re.sub(r'([A-Za-z]#\d+)', sub_def, input)
+    return out
diff --git a/challenge_12/python/mindm/src/test.py b/challenge_12/python/mindm/src/test.py
new file mode 100644
index 000000000..d5948a40f
--- /dev/null
+++ b/challenge_12/python/mindm/src/test.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+import unittest
+import random
+from compression import compress, decompress
+
+
+class TestComp(unittest.TestCase):
+
+    def test_1(self):
+        self.assertEqual(decompress("a#5"), "aaaaa")
+
+    def test_2(self):
+        self.assertEqual(compress("abbcccddddeeeee"), "abbcccd#4e#5")
+
+    def test_3(self):
+        original = "aliiiiicia foooooooohx"
+        compressed = compress(original)
+        decompressed = decompress(compressed)
+        self.assertEqual(original, decompressed)
+
+    def test_long(self):
+        self.assertEqual(compress("fooooooooooooooox"), "fo#15x")
+
+    def test_long2(self):
+        self.assertEqual(decompress("fo#15x"), "fooooooooooooooox")
+
+if __name__ == '__main__':
+    unittest.main()
\ No newline at end of file