2 files changed, 76 insertions, 0 deletions
diff --git a/challenge-259/steven-wilson/python/ch-1.py b/challenge-259/steven-wilson/python/ch-1.py
new file mode 100644
index 0000000000..fe8d448022
--- /dev/null
+++ b/challenge-259/steven-wilson/python/ch-1.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+
+from datetime import timedelta
+from datetime import date
+
+
+def banking_day_offset(start_date, offset, bank_holidays=None):
+    ''' Given a number (of days) and a start date, return the number (of days)
+    adjusted to take into account non-banking days. In other words: convert a
+    banking day offset to a calendar day offset.
+
+    >>> banking_day_offset('2018-06-28', 3, ['2018-07-03'])
+    '2018-07-04'
+    >>> banking_day_offset('2018-06-28', 3)
+    '2018-07-03'
+    '''
+    if bank_holidays is None:
+        bank_holidays = []
+
+    if not isinstance(offset, int) or offset < 0:
+        raise ValueError(f"{offset} is not a valid offset")
+
+    try:
+        odate = date.fromisoformat(start_date)
+    except ValueError:
+        raise ValueError(f"{start_date} is not a valid iso format start date")
+
+    for holiday in bank_holidays:
+        try:
+            date.fromisoformat(holiday)
+        except ValueError:
+            raise ValueError(f"{holiday} is not a valid iso format bank holiday")
+
+    weekend = [5, 6]
+
+    for _ in range(offset):
+        odate += timedelta(days=1)
+        while odate.weekday() in weekend or odate.isoformat() in bank_holidays:
+            odate += timedelta(days=1)
+
+    return odate.isoformat()
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()
diff --git a/challenge-260/steven-wilson/python/ch-1.py b/challenge-260/steven-wilson/python/ch-1.py
new file mode 100644
index 0000000000..4305bd667b
--- /dev/null
+++ b/challenge-260/steven-wilson/python/ch-1.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+
+
+def unique_occurences(*elements):
+    '''
+    >>> unique_occurences(1,2,2,1,1,3)
+    1
+    >>> unique_occurences(1,2,3)
+    0
+    >>> unique_occurences(-2,0,1,-2,1,1,0,1,-2,9)
+    1
+    '''
+    if not all(isinstance(elem, int) for elem in elements):
+        raise ValueError("Input must consist of integers")
+
+    from collections import Counter
+
+    counts = Counter(elements)
+    occurences = counts.values()
+    if len(counts) == len(set(occurences)):
+        return 1
+    else:
+        return 0
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()