Stop using PYTHONPATH

Author: mrkn

lib/pycall/init.rb

@@ -30,8 +30,6 @@ class << PyCall::LibPython
       remove_method :const_missing
     end
 
-    ENV['PYTHONPATH'] = [ File.expand_path('../python', __FILE__), ENV['PYTHONPATH'] ].compact.join(File::PATH_SEPARATOR)
-
     LibPython.instance_variable_set(:@handle, LibPython::Finder.find_libpython(python))
     class << LibPython
       undef_method :handle
@@ -45,6 +43,8 @@ class << LibPython
       require 'pycall.so'
     end
 
+    PyCall.sys.path.append(File.expand_path('../python', __FILE__))
+
     require 'pycall/dict'
     require 'pycall/list'
     require 'pycall/slice'