address #187 -- export CIF

Author: briantoby

GSASII/exports/G2export_CIF.py

@@ -12,14 +12,15 @@
 import copy
 import re
 interactive = False
+G2G = None  # used in Project export 
 try:
     # TODO: code that calls wx should be hidden in GUI modules that are imported only when needed
     import wx
     import wx.lib.scrolledpanel as wxscroll
     import wx.lib.resizewidget as rw
     interactive = True
 except ImportError:
-    G2G = None  # used in Project export 
+    wx = None
     # Avoid wx dependency for Scriptable
     class Placeholder(object):
         def __init__(self):
@@ -4679,9 +4680,14 @@ def Exporter(self,event=None,seqData=None,Controls=None):
         #print('reloaded GSASIImapvars')
         #### end debug stuff ##############################
 
-        if G2G is None:
+        if wx is None:
             print('Unable to export without GUI access')
             return
+        try:
+            from .. import GSASIIctrlGUI as G2G
+        except:
+            print('Unable to export without GSASIIctrlGUI access')
+            return
         try:
             import CifFile as cif # PyCifRW from James Hester as a package
         except ImportError:
@@ -4690,7 +4696,6 @@ def Exporter(self,event=None,seqData=None,Controls=None):
                 cif
             except ImportError:
                 msg = 'The PyCifRW package is not installed. CIF templates cannot be accessed. Created CIFs will be incomplete'
-                from .. import GSASIIctrlGUI as G2G
                 G2G.G2MessageBox(self.G2frame,msg,'no PyCifRW')
         self.CIFname = ''
         self.seqData = seqData