Add code for leetcode No.58.

Author: yanglr

Diff for: leetcode-058/leetcode058.py

@@ -0,0 +1,11 @@
+class Solution:
+    def lengthOfLastWord(self, s: str) -> int: 
+        newStr = s.strip()       
+        lastSpacePos = newStr.rfind(' ')
+        if lastSpacePos == -1:
+            return len(newStr)
+        else:
+            return len(newStr) - lastSpacePos - 1
+
+sol = Solution()
+print(sol.lengthOfLastWord('Hello my baby'))