2 files changed, 59 insertions, 0 deletions
diff --git a/challenge-323/steven-wilson/python/ch-1.py b/challenge-323/steven-wilson/python/ch-1.py
new file mode 100644
index 0000000000..88020f8772
--- /dev/null
+++ b/challenge-323/steven-wilson/python/ch-1.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+
+
+def increment_decrement(operations):
+    """ Given a list of operations, return the final value after performing the
+    given operations in order. The initial value is always 0.
+
+    >>> increment_decrement(["--x", "x++", "x++"])
+    1
+    >>> increment_decrement(["x++", "++x", "x++"])
+    3
+    >>> increment_decrement(["x++", "++x", "--x", "x--"])
+    0
+    """
+    increment = {"++x", "x++"}
+    decrement = {"--x", "x--"}
+    value = 0
+    for op in operations:
+        if op in increment:
+            value += 1
+        elif op in decrement:
+            value -= 1
+    return value
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)
diff --git a/challenge-323/steven-wilson/python/ch-2.py b/challenge-323/steven-wilson/python/ch-2.py
new file mode 100644
index 0000000000..2bb7797e8e
--- /dev/null
+++ b/challenge-323/steven-wilson/python/ch-2.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+
+def tax_amount(income, tax):
+    """Given an income amount and tax brackets, calculate the total tax amount.
+
+    >>> tax_amount(10, [[3, 50], [7, 10], [12,25]])
+    2.65
+    >>> tax_amount(2, [[1, 0], [4, 25], [5,50]])
+    0.25
+    >>> tax_amount(0, [[2, 50]])
+    0
+    """
+    lower = 0
+    bracket_amount = []
+    for t in tax:
+        if income >= t[0]:
+            bracket_amount.append(t[0] - lower)
+        elif income > lower:
+            bracket_amount.append(income - lower)
+        else:
+            break
+        lower = t[0]
+    return sum(amount * (percent[1] / 100) for amount, percent in zip(bracket_amount, tax))
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)