add solutions week 282 in python

2 files changed, 64 insertions, 0 deletions

diff --git a/challenge-282/steven-wilson/python/ch-1.py b/challenge-282/steven-wilson/python/ch-1.py
new file mode 100644
index 0000000000..dd8a772db2
--- /dev/null
+++ b/challenge-282/steven-wilson/python/ch-1.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+from itertools import groupby
+
+
+def good_integer(integer):
+    """ Given a positive integer, having 3 or more digits, return the Good
+    Integer in the given integer or -1 if none found.
+
+        A good integer is exactly three consecutive matching digits.
+
+    >>> good_integer(12344456)
+    '444'
+    >>> good_integer(1233334)
+    -1
+    >>> good_integer(10020003)
+    '000'
+    """
+    integer_string = str(integer)
+
+    if len(integer_string) < 3:
+        raise ValueError('Integer provided must have at least 3 digits')
+
+    for _, item in groupby(integer_string):
+        group = ''.join(item)
+        if len(group) == 3:
+            return group
+    return -1
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)
diff --git a/challenge-282/steven-wilson/python/ch-2.py b/challenge-282/steven-wilson/python/ch-2.py
new file mode 100644
index 0000000000..199cffc157
--- /dev/null
+++ b/challenge-282/steven-wilson/python/ch-2.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python3
+
+from itertools import groupby
+
+
+def changing_keys(string):
+    """ Given an alphabetic string as typed by user,return the number of times
+    user had to change the key to type the given string. Changing key is
+    defined as using a key different from the last used key. The shift and caps
+    lock keys won’t be counted.
+    >>> changing_keys('pPeERrLl')
+    3
+    >>> changing_keys('rRr')
+    0
+    >>> changing_keys('GoO')
+    1
+    """
+    if len(string) == 0:
+        return 0
+
+    if not all(c.isalpha() for c in string):
+        raise ValueError('User should type an aphabetic string')
+
+    return len([item for _, item in groupby(string.casefold())]) - 1
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod(verbose=True)