add regex exercises

regexp/Task301.py

@@ -0,0 +1,9 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+import re
+def letter_and_two_digits(napis):
+    if re.search(r'[A-Z]\d{2}', napis):
+        return True
+    else:
+        return False

regexp/Task302.py

@@ -0,0 +1,14 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+import re
+
+
+def extract_minutes(string):
+    pattern = r'^([0-9]|1[0-9]|2[0-3]):([0-5][0-9])$'
+    out = re.search(pattern, string)
+
+    if out is None:
+        return '<NONE>'
+    else:
+        return out.group(2)

regexp/Task303.py

@@ -0,0 +1,6 @@
+import re
+
+
+def divisable_by_four(string):
+    pattern = '^[048]$|^[0-9]*([13579][26]|[2468][048])$|^[1-9][0-9]*(00|04|08)$'
+    return re.search(pattern, string)

regexp/Task328.py

@@ -0,0 +1,6 @@
+import re
+
+
+def is_hmmmm(string):
+    pattern = r'^hm{2,}(\.{3,}|)$'
+    return re.search(pattern, string)