diff --git a/knotid.py b/knotid.py
new file mode 100644
index 0000000..fbca6da
--- /dev/null
+++ b/knotid.py
@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+import os, sys, subprocess
+import numpy, networkx, sympy, appdirs, requests, tqdm
+_thisdir = os.path.split(os.path.abspath(__file__))[0]
+
+try:
+	import planarity
+except ModuleNotFoundError:
+	pass
+
+try:
+	import peewee
+except ModuleNotFoundError:
+	print('peewee not installed')
+
+try:
+	import vizpy
+except ModuleNotFoundError:
+	print('vizpy not installed')
+
+sys.path.append(_thisdir)
+import pyknotid
+print(pyknotid)
+import pyknotid.spacecurves as sp
+print(sp)
+import pyknotid.make as mk
+print(mk)
+
+def test():
+	k = sp.SpaceCurve(mk.trefoil())
+	print(k)
+	g2 = k.gauss_code(recalculate=True, try_cython=False)
+	print(g2)
+
+def test_random():
+	from random import uniform
+	points = [ [uniform(-1,1),uniform(-1,1),uniform(-1,1)] for i in range(10)]
+	k = sp.SpaceCurve( points )
+	print(k)
+	g2 = k.gauss_code(recalculate=True, try_cython=False)
+	print(g2)
+
+if '--test' in sys.argv:
+	test()
+	test_random()
diff --git a/pyknotid/visualise.py b/pyknotid/visualise.py
index 9843b48..9a0209b 100644
--- a/pyknotid/visualise.py
+++ b/pyknotid/visualise.py
@@ -20,7 +20,10 @@
 
 from __future__ import division
 
-import vispy
+try:
+    import vispy
+except ModuleNotFoundError:
+    vispy = None
 # vispy.use('PyQt5')
 
 import numpy as n
@@ -29,11 +32,11 @@
 from pyknotid.utils import ensure_shape_tuple, vprint
 import random
 from colorsys import hsv_to_rgb
-
-try:
-    from vispy.visuals.transforms import MatrixTransform
-except (AttributeError, ImportError):
-    from vispy.visuals.transforms import AffineTransform as MatrixTransform
+if vispy:
+    try:
+        from vispy.visuals.transforms import MatrixTransform
+    except (AttributeError, ImportError):
+        from vispy.visuals.transforms import AffineTransform as MatrixTransform
 
 vispy_canvas = None