solve replace bits challenge in python

Bit-manipulationTechniques/ReplaceBitsChallenge/main.py

@@ -0,0 +1,22 @@
+def clear_bits_in_range(n: int, i: int, j: int):
+    a = (-1) << (j + 1)
+    b = (1 << i) - 1
+    mask = a | b
+    return n & mask
+
+
+def replace_bits_in_range(n: int, m: int, i: int, j: int):
+    n = clear_bits_in_range(n, i, j)
+    mask = m << i
+    return n | mask
+
+
+def main():
+    n, m, i, j = 512, 21, 2, 6
+
+    n = replace_bits_in_range(n, m, i, j)
+    print(n)
+
+
+if __name__ == "__main__":
+    main()