--- /dev/null
+# required by dev-python/matplotlib (argument)
+dev-python/matplotlib ~x86
+
+# required by dev-python/matplotlib-1.2.0-r2[wxwidgets],
+# required by dev-python/ipython-0.13.1-r1[matplotlib],
+# required by dev-python/sympy-0.7.2[ipython],
+# required by dev-python/sympy (argument)
+dev-python/wxpython ~x86