1 files changed, 40 insertions, 0 deletions

diff --git a/util.py b/util.py
new file mode 100644
index 0000000..480ae5f
--- /dev/null
+++ b/util.py
@@ -0,0 +1,40 @@
+import numpy as np
+from tempfile import NamedTemporaryFile as Tmp
+
+def load_csv_file(fname, *args, **kargs):
+    f = open(fname)
+    data = np.genfromtxt(f, delimiter=",", comments="#",
+                         *args, **kargs)
+    f.close() # don't leak file handles
+    return data
+
+def write_csv_file(fname, rows, header=None, width=None):
+    if fname is None:
+        f = Tmp()
+    else:
+        f = open(fname, 'w')
+    if width:
+        fmt = "%%%ds" % width
+    else:
+        fmt = "%s"
+
+    if header:
+        f.write('#')
+        f.write(", ".join([fmt % str(x) for x in header]))
+        f.write('\n')
+    for row in rows:
+        f.write(' ')
+        f.write(", ".join([fmt % str(x) for x in row]))
+        f.write('\n')
+    if fname is None:
+        # keep it open
+        f.flush()
+        return f
+    else:
+        f.close()
+
+def select(keep, rows):
+    ok_rows = np.zeros(len(rows), dtype=bool)
+    for i, row in enumerate(rows):
+        ok_rows[i] = keep(row)
+    return rows[ok_rows]