[yt-svn] commit/yt: ngoldbaum: Merged in brittonsmith/yt (pull request #1863)

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1 new commit in yt:

https://bitbucket.org/yt_analysis/yt/commits/ee9ca9eebfb5/
Changeset:   ee9ca9eebfb5
Branch:      yt
User:        ngoldbaum
Date:        2015-11-16 17:38:45+00:00
Summary:     Merged in brittonsmith/yt (pull request #1863)

[BUGFIX] close loophole that allowed improper LightRay use
Affected #:  1 file

diff -r fc56cb7acc07431d4e8877b9c89192b0b05477fd -r ee9ca9eebfb5472caa3e6dcc3004f0dc66a17554 yt/analysis_modules/cosmological_observation/light_ray/light_ray.py
--- a/yt/analysis_modules/cosmological_observation/light_ray/light_ray.py
+++ b/yt/analysis_modules/cosmological_observation/light_ray/light_ray.py
@@ -64,12 +64,12 @@
         Default: None
     near_redshift : optional, float
         The near (lowest) redshift for a light ray containing multiple
-        datasets.  Do not use is making a light ray from a single
+        datasets.  Do not use if making a light ray from a single
         dataset.
         Default: None
     far_redshift : optional, float
         The far (highest) redshift for a light ray containing multiple
-        datasets.  Do not use is making a light ray from a single
+        datasets.  Do not use if making a light ray from a single
         dataset.
         Default: None
     use_minimum_datasets : optional, bool
@@ -168,9 +168,9 @@
 
         # If using only one dataset, set start and stop manually.
         if start_position is not None:
-            if len(self.light_ray_solution) > 1:
-                raise RuntimeError("LightRay Error: cannot specify start_position " + \
-                                   "if light ray uses more than one dataset.")
+            if self.near_redshift is not None or self.far_redshift is not None:
+                raise RuntimeError("LightRay Error: cannot specify both " + \
+                                   "start_position and a redshift range.")
             if not ((end_position is None) ^ (trajectory is None)):
                 raise RuntimeError("LightRay Error: must specify either end_position " + \
                                    "or trajectory, but not both.")

Repository URL: https://bitbucket.org/yt_analysis/yt/

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