to remove ->None

Author: kosuri-indu

backtracking/generate_parentheses.py

@@ -24,7 +24,7 @@
 """
 
 
-def generate_parentheses(n) -> None:
+def generate_parentheses(n):
     """
 
     >>> generate_parentheses(3)
@@ -38,7 +38,7 @@ def generate_parentheses(n) -> None:
 
     """
 
-    def backtrack(x="", left=0, right=0) -> None:
+    def backtrack(x="", left=0, right=0):
         if len(x) == 2 * n:
             sol.append(x)
             return
@@ -52,7 +52,7 @@ def backtrack(x="", left=0, right=0) -> None:
     return sol
 
 
-def main() -> None:
+def main():
     print(generate_parentheses(3))