Challenge 120 LK Python

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diff --git a/challenge-120/lubos-kolouch/python/ch-1.py b/challenge-120/lubos-kolouch/python/ch-1.py
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+# ===============================================================================
+#
+#         FILE: ch-2.pl
+#
+#        USAGE: ./ch-2.pl
+#
+#  DESCRIPTION: Perl Weekly Challenge #120
+#               Task 1 - Swap Odd/Even bits
+#
+#       AUTHOR: Lubos Kolouch
+#      CREATED: 20210710 04:44:33 PM
+# ===============================================================================
+
+
+def swap_bits(what: int):
+
+    binary_what = str(bin(what)[2:])
+
+    if len(binary_what) % 2 == 1:
+        binary_what = "0" + binary_what
+
+    arr = [binary_what[i:i+2] for i in range(0, len(binary_what), 2)]
+    rev_arr = list(map(lambda x: x[::-1], arr))
+    return int("".join(rev_arr), 2)
+
+
+assert swap_bits(101) == 154
+assert swap_bits(18) == 33
diff --git a/challenge-120/lubos-kolouch/python/ch-2.py b/challenge-120/lubos-kolouch/python/ch-2.py
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+# ===============================================================================
+#
+#         FILE: ch-2.py
+#
+#        USAGE: ./ch-2.py
+#
+#  DESCRIPTION: Perl Weekly Challenge #120
+#               Task 2 - Clock Angle
+#
+#       AUTHOR: Lubos Kolouch
+#      CREATED: 20210710 04:44:33 PM
+# ===============================================================================
+
+
+def calc_angle(what: str):
+
+    hour, minute = map(int, what.split(':'))
+
+    # each minute is 6 degrees
+    angle_min = 6 * minute
+
+    # hour hand has moved 30 * whole hours + 0.5 * mins
+    angle_hour = 30 * hour + 0.5 * minute
+
+    result_angle = abs(angle_hour - angle_min)
+
+    # the challenge is asking for the smaller angle
+    if result_angle > 180:
+        return 360-result_angle
+
+    return result_angle
+
+
+assert calc_angle("03:10") == 35
+assert calc_angle("04:00") == 120
+assert calc_angle("10:14") == 137