[hw3]

1 files changed, 28 insertions, 0 deletions

diff --git a/hw3/build_train_test.py b/hw3/build_train_test.py
new file mode 100644
index 0000000..2498ce0
--- /dev/null
+++ b/hw3/build_train_test.py
@@ -0,0 +1,28 @@
+import sys
+from random import shuffle
+from pickle import dump
+
+
+def get_ratings(filename):
+    d = {}
+    with open(filename) as fh:
+        for line in fh:
+            i, j, r = map(int, line.strip().split())
+            d[(i, j)] = r
+    n = max(i for (i, j) in d)
+    m = max(j for (i, j) in d)
+    return d, n, m
+
+
+def split_train_test():
+    keys = ratings.keys()
+    s = int(1e5)
+    shuffle(keys)
+    test = {k: ratings[k] for k in keys[:s]}
+    train = {k: ratings[k] for k in keys[s:]}
+    return train, test
+
+if __name__ == "__main__":
+    ratings, n, m = get_ratings(sys.argv[1])
+    train, test = split_train_test()
+    dump((n, m, train, test), open("data.pickle", "wb"))