added doctests to stringfunctions.py

strings/stringfunctions.py

@@ -7,10 +7,15 @@ def is_upper(string: str) -> bool:
         
     Returns:
         bool: True if all characters in the string are uppercase letters, False otherwise.
+    
+    Examples:
+    >>> is_upper("HELLO")
+    True
+    >>> is_upper("Hello")
+    False
     """
     return all(ord(char) >= 65 and ord(char) <= 90 for char in string)
 
-
 def is_lower(string: str) -> bool:
     """
     Check if all characters in the string are lowercase letters.
@@ -20,10 +25,15 @@ def is_lower(string: str) -> bool:
         
     Returns:
         bool: True if all characters in the string are lowercase letters, False otherwise.
+    
+    Examples:
+    >>> is_lower("hello")
+    True
+    >>> is_lower("Hello")
+    False
     """
     return all(ord(char) >= 97 and ord(char) <= 122 for char in string)
 
-
 def is_alpha(string: str) -> bool:
     """
     Check if all characters in the string are alphabetical (letters).
@@ -33,10 +43,15 @@ def is_alpha(string: str) -> bool:
         
     Returns:
         bool: True if all characters in the string are letters, False otherwise.
+    
+    Examples:
+    >>> is_alpha("Hello")
+    True
+    >>> is_alpha("Hello123")
+    False
     """
     return all(char.isalpha() for char in string)
 
-
 def is_alnum(string: str) -> bool:
     """
     Check if all characters in the string are alphanumeric (letters or digits).
@@ -46,10 +61,15 @@ def is_alnum(string: str) -> bool:
         
     Returns:
         bool: True if all characters in the string are letters or digits, False otherwise.
+    
+    Examples:
+    >>> is_alnum("Hello123")
+    True
+    >>> is_alnum("Hello 123")
+    False
     """
     return all(char.isalnum() for char in string)
 
-
 def is_decimal(string: str) -> bool:
     """
     Check if all characters in the string are decimal digits.
@@ -59,10 +79,15 @@ def is_decimal(string: str) -> bool:
         
     Returns:
         bool: True if all characters in the string are decimal digits, False otherwise.
+    
+    Examples:
+    >>> is_decimal("12345")
+    True
+    >>> is_decimal("12.345")
+    False
     """
     return all(char.isdigit() for char in string)
 
-
 def is_space(string: str) -> bool:
     """
     Check if all characters in the string are whitespace characters.
@@ -72,10 +97,15 @@ def is_space(string: str) -> bool:
         
     Returns:
         bool: True if all characters in the string are whitespace characters, False otherwise.
+    
+    Examples:
+    >>> is_space("    \\t\\n")
+    True
+    >>> is_space("Hello")
+    False
     """
     return all(char.isspace() for char in string)
 
-
 def is_title(string: str) -> bool:
     """
     Check if the string is in title case (first letter of each word is capital).
@@ -85,24 +115,15 @@ def is_title(string: str) -> bool:
         
     Returns:
         bool: True if the string is in title case, False otherwise.
+    
+    Examples:
+    >>> is_title("This Is A Title Case String")
+    True
+    >>> is_title("This is Not a Title Case String")
+    False
     """
     return string.istitle()
 
-
-# Tests
-assert is_upper("HELLO")
-assert not is_upper("Hello")
-assert is_lower("hello")
-assert not is_lower("Hello")
-assert is_alpha("Hello")
-assert not is_alpha("Hello123")
-assert is_alnum("Hello123")
-assert not is_alnum("Hello 123")
-assert is_decimal("12345")
-assert not is_decimal("12.345")
-assert is_space("    \t\n")
-assert not is_space("Hello")
-assert is_title("This Is A Title Case String")
-assert not is_title("This is Not a Title Case String")
-
-print("All tests passed!")
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()