Add string_match problem

dotfiles/lib/python/string_match.py

@@ -0,0 +1,32 @@
+def exact_match(text_body, query):
+    for index in range(len(text_body) - len(query) + 1):
+        for query_index, query_character in enumerate(query):
+            if query_character != text_body[index+query_index]:
+                break
+        else:
+            return True
+    return False
+
+def wildcard_match(text_body, query):
+    for index in range(len(text_body) - len(query) + 1):
+        for query_index, query_character in enumerate(query):
+            if (query_character != '.' and
+                query_character != text_body[index+query_index]):
+                break
+        else:
+            return True
+    return False
+
+def match_maybe(text_body, query):
+    if query == "":
+        return True
+    if len(query) > 1 and query[1] == '?':
+        return ((len(text_body) > 0 and text_body[0] == query[0] and match_maybe(text_body[1:], query[2:]))
+                or match_maybe(text_body, query[2:]))
+    return text_body[0] == query[0] and match_maybe(text_body[1:], query[1:])
+
+def match_maybe_all(text_body, query):
+    for starting_index in range(len(text_body)):
+        if match_maybe(text_body[starting_index:], query):
+            return True
+    return False