fix dictionary referencing (#194)

* fix dictionary referencing

Had an issue with the Constraints object not having a 'Phase' key. The only key in Constraints is 'data' and the corresponding value is a dictionary with the 'Phase' key. Fixed by specifying 'data' key.

* fix abspath arguments issue

Had error mentioning abspath only takes 1 (positional) argument and two were given, related to the calling of "abspath(path2GSAS2, 'G2.py')". Assumed that this should be the path to 'G2.py' in the path2GSAS2 directory, so used os.path.join(path2GSAS2, 'G2.py') to join them together so that is the argument in abspath. Worked fine after this change, with the following console output:
Python installed at  /mnt/ceph/home/f1118524/.conda/envs/G2env/bin/python3.13
GSAS-II installed at /mnt/ceph/home/f1118524/.conda/envs/G2env/G2/GSASII
G2.py at             /mnt/ceph/home/f1118524/.conda/envs/G2env/G2/GSASII/G2.py
GSASII icon at       /mnt/ceph/home/f1118524/.conda/envs/G2env/G2/GSASII/icons/gsas2.png
Created Desktop shortcut calling gnome-terminal as file
	/home/f1118524/Desktop/GSASII.desktop
Created Menu shortcut calling gnome-terminal as file
	/home/f1118524/.local/share/applications/GSASII.desktop
Created '/mnt/ceph/home/f1118524/.conda/envs/G2env/Reset2FreshGSASII.sh' to reset GSAS-II installation when all else fails...

Author: dafda1

GSASII/GSASIIscriptable.py

@@ -1391,7 +1391,7 @@ def add_phase(self, phasefile=None, phasename=None, histograms=[],
 
         # process constraints, currently generated only from ISODISTORT CIFs
         if phasereader.Constraints:
-            Constraints = self.data['Constraints']
+            Constraints = self.data['Constraints']['data']
             for i in phasereader.Constraints:
                 if isinstance(i, dict):
                     if '_Explain' not in Constraints:

GSASII/install/makeLinux.py

@@ -45,7 +45,7 @@ def Usage():
         # find the main GSAS-II script if not on command line
         path2GSAS2 = os.path.dirname(os.path.dirname(__file__))
         path2repo = os.path.dirname(path2GSAS2)
-        G2script = os.path.abspath(path2GSAS2,"G2.py")
+        G2script = os.path.abspath(os.path.join(path2GSAS2,"G2.py"))
     elif __file__.endswith("makeLinux.py") and len(sys.argv) == 2:
         G2script = os.path.abspath(sys.argv[1])
         path2GSAS2 = os.path.dirname(G2script)