Create to-lower-case.py

Author: kamyu104

Python/to-lower-case.py

@@ -0,0 +1,14 @@
+# Time:  O(n)
+# Space: O(1)
+
+# Implement function ToLowerCase() that has a string parameter str,
+# and returns the same string in lowercase.
+
+class Solution(object):
+    def toLowerCase(self, str):
+        """
+        :type str: str
+        :rtype: str
+        """
+        return "".join([chr(ord('a')+ord(c)-ord('A')) 
+                        if 'A' <= c <= 'Z' else c for c in str])