My new branch

computer_networks/char_stuffing.py

@@ -0,0 +1,27 @@
+FLAG = "~"
+ESC = "#"
+
+
+def char_stuffing(string: str) -> str:
+    """
+    Return the char stuffed message
+    >>> char_stuffing("abc")
+    'abc'
+    >>> char_stuffing("a#b#c")
+    'a##b##c'
+    """
+    arr = []
+    # Create a list of characters from the string
+    for character in string:
+        arr.append(character)
+    for i in range(len(arr)):
+        # If we encounter the FLAG and it's not the first or last character
+        if arr[i] == FLAG and not (i == 0 or i == len(arr) - 1):
+            arr[i] = ESC + arr[i]  # Prepend ESC to FLAG
+        elif arr[i] == ESC:
+            arr[i] += ESC  # Duplicate ESC
+    return "".join(arr)  # Join the list of characters back into a string
+
+
+string = "~abc#~cde~ab~"
+print(char_stuffing(string))