1 files changed, 42 insertions, 0 deletions
diff --git a/pokemontools/helpers.py b/pokemontools/helpers.py
new file mode 100644
index 0000000..232a632
--- /dev/null
+++ b/pokemontools/helpers.py
@@ -0,0 +1,42 @@
+"""
+Generic functions that should be reusable anywhere in pokemontools.
+"""
+import os
+
+def index(seq, f):
+    """return the index of the first item in seq
+    where f(item) == True."""
+    return next((i for i in xrange(len(seq)) if f(seq[i])), None)
+
+def grouper(some_list, count=2):
+    """splits a list into sublists
+    given: [1, 2, 3, 4]
+    returns: [[1, 2], [3, 4]]"""
+    return [some_list[i:i+count] for i in range(0, len(some_list), count)]
+
+def flattener(x):
+    "flattens a list of sublists into just one list (generator)"
+    try:
+        it = iter(x)
+    except TypeError:
+        yield x
+    else:
+        for i in it:
+            for j in flattener(i):
+                yield j
+
+def flatten(x):
+    "flattens a list of sublists into just one list"
+    return list(flattener(x))
+
+def mkdir_p(path):
+    """
+    Make a directory at a given path.
+    """
+    try:
+        os.makedirs(path)
+    except OSError as exc: # Python >2.5
+        if exc.errno == errno.EEXIST:
+            pass
+        else:
+            raise exc