Create longest_word_in_sentence.py

strings/longest_word_in_sentence.py

@@ -0,0 +1,19 @@
+def longest_word(sentence: str) -> str:
+    """
+    Finds the longest word in a sentence.
+
+    >>> longest_word("The quick brown fox jumped over the lazy dog")
+    'jumped'
+    >>> longest_word("Python is amazing")
+    'amazing'
+    >>> longest_word("")
+    ''
+    >>> longest_word("a")
+    'a'
+    """
+    words = sentence.split()
+    return max(words, key=len) if words else ''
+
+if __name__ == "__main__":
+    from doctest import testmod
+    testmod()