modified the file

Author: vivek2004-sec

strings/secret_language.py

@@ -9,9 +9,10 @@ def random_chars() -> str:
     Generate a random string of 3 ASCII letters.
 
     >>> import random
-    >>> random.seed(42)
-    >>> random_chars()
-    'ZoX'
+    >>> len(random_chars()) == 3
+    True
+    >>> all(c in string.ascii_letters for c in random_chars())
+    True
     """
     return ''.join(random.choices(string.ascii_letters, k=3))
 
@@ -20,10 +21,10 @@ def random_digits() -> str:
     """
     Generate a random string of 3 digits.
 
-    >>> import random
-    >>> random.seed(42)
-    >>> random_digits()
-    '638'
+    >>> len(random_digits()) == 3
+    True
+    >>> all(c in string.digits for c in random_digits())
+    True
     """
     return ''.join(random.choices(string.digits, k=3))
 
@@ -35,15 +36,10 @@ def encode(code: str) -> str:
 
     Reference: https://en.wikipedia.org/wiki/Caesar_cipher
 
-    >>> import random
-    >>> random.seed(42)
-    >>> encode('hello')
-    'ZoX638elloh415mJu'
-
-    >>> import random
-    >>> random.seed(42)
-    >>> encode('hi')
-    'ZoX638ih415mJu'
+    >>> len(encode('hello')) == len('hello') + 12
+    True
+    >>> len(encode('hi')) == len('hi') + 12
+    True
     """
     if len(code) >= 3:
         code = code[1:] + code[0]
@@ -59,15 +55,12 @@ def decode(code: str) -> str:
     Decode an encoded string by stripping the random padding and
     reversing the character shift.
 
-    >>> import random
-    >>> random.seed(42)
     >>> decode(encode('hello'))
     'hello'
-
-    >>> import random
-    >>> random.seed(42)
     >>> decode(encode('hi'))
     'hi'
+    >>> decode(encode('python'))
+    'python'
     """
     code = code[6:-6]
     if len(code) >= 3: