typo fixed in the comb.py 👽

src/builtin_structures/combinations.py

@@ -3,21 +3,24 @@
 __author__ = "bt3"
 
 
-def comb_str(l1):
+def combinations(s):
-
+    '''
-    if len(l1) < 2:
+    >>> combinations('abc')
-        return l1
+    ['abc', 'acb', 'bac', 'bca', 'cab', 'cba']
-
+    >>> combinations('')
-    result = []
+    ''
-    for i, c in enumerate(l1):
+    '''
-        result.append(c)
+    if len(s) < 2:
-        for comb in comb_str(l1[i+1:]):
+        return s
-            result.append(c + comb)
+    res = []
-
+    for i, c in enumerate(s):
-    return result
+        res.append(c)
+        for j in combinations(s[:i] + s[i+1:]):
+            res.append(c + j)
+    return res
 
 
 
 if __name__ == '__main__':
-    l1 = ['a', 'b', 'c']
+    import doctest
-    print comb_str(l1)
+    doctest.testmod()