figshare_stem: Changes handling of empty string

Update figshare_group()

requiam/commons.py

@@ -1,10 +1,10 @@
-def figshare_stem(stem, production=True):
+def figshare_stem(stem='', production=True):
     """
     Purpose:
       Construct Grouper figshare stems
 
     :param stem: string corresponding to the sub-stem
-       Options are: 'quota', 'portal'
+       Some options are: 'quota', 'portal'. Default: root stem
     :param production: Bool to use production stem. Otherwise a stage/test is used. Default: True
     :return stem_query: str
 
@@ -14,11 +14,18 @@ def figshare_stem(stem, production=True):
 
       For portal stem, call as: figshare_stem('portal')
         > 'arizona.edu:dept:LBRY:figshare:portal'
+
+      For main stem, call as: figshare_stem()
+        > 'arizona.edu:dept:LBRY:figshare'
     """
 
     if production:
-        stem_query = f'arizona.edu:dept:LBRY:figshare:{stem}'
+        stem_query = 'arizona.edu:dept:LBRY:figshare'
     else:
-        stem_query = f'arizona.edu:dept:LBRY:devtest:chun{stem}'
+        stem_query = 'arizona.edu:dept:LBRY:figtest'
+
+    # If [stem] is not an empty string
+    if stem:
+        stem_query += f':{stem}'
 
     return stem_query

requiam/grouper_query.py

@@ -56,7 +56,7 @@ def figshare_group(group, root_stem, production=True):
     Purpose:
       Construct Grouper figshare groups
 
-    :param group: str or int of group name
+    :param group: str or int of group name. Cannot be empty
     :param root_stem: str of associated stem folder for [group]
     :param production: Bool to use production stem. Otherwise a stage/test is used. Default: True
 
@@ -74,12 +74,12 @@ def figshare_group(group, root_stem, production=True):
         > 'arizona.edu:dept:LBRY:figshare:portal:sci_math'
     """
 
-    stem_query = figshare_stem(root_stem, production=production)
+    if not group:
+        raise ValueError("WARNING: Empty [group]")
 
-    if root_stem == '':
-        grouper_group = stem_query + group
-    else:
-        grouper_group = '{}:{}'.format(stem_query, group)
+    stem_query = figshare_stem(stem=root_stem, production=production)
+
+    grouper_group = '{}:{}'.format(stem_query, group)
 
     return grouper_group