encode and decode strings solution

Author: parkhojeong

encode-and-decode-strings/parkhojeong.py

@@ -0,0 +1,28 @@
+class Codec:
+    def encode(self, strs: List[str]) -> str:
+        """Encodes a list of strings to a single string.
+        """
+        encoded = ""
+        for s in strs:
+            encoded += f"{len(s):03d}{s}"
+        return encoded
+
+    def decode(self, s: str) -> List[str]:
+        """Decodes a single string to a list of strings.
+        """
+
+        decoded = []
+        i = 0
+        while i < len(s):
+            s_start_idx = i + 3
+            s_len = int(s[i:s_start_idx])
+            decoded.append(s[s_start_idx:s_start_idx + s_len])
+
+            i = s_start_idx + s_len
+
+        return decoded
+
+
+# Your Codec object will be instantiated and called as such:
+# codec = Codec()
+# codec.decode(codec.encode(strs))