Use ni backend when specifying a file in open_visa_library (#373)

* Use ni backend when specifying a file in open_visa_library * Updated CHANGES
pyvisa · Oct 22, 2018 · c7054f4 · c7054f4
1 parent 7f26022
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diff --git a/CHANGES b/CHANGES
@@ -9,6 +9,7 @@ PyVISA Changelog
 - added new function log_to_stream() PR #363
 - Made all enumerations of the `constants` module unique. 
   Fixed duplicate enums in StatusCode PR #371
+- Use ni backend when specifying a file in open_visa_library PR #373
 
 
 1.9.1 (2018-08-13)

diff --git a/pyvisa/highlevel.py b/pyvisa/highlevel.py
@@ -1490,7 +1490,10 @@ def open_visa_library(specification):
         argument = specification
         wrapper = None  # Flag that we need a fallback, but avoid nested exceptions
     if wrapper is None:
-        wrapper = _get_default_wrapper()
+        if argument: # some filename given
+            wrapper = 'ni'
+        else:
+            wrapper = _get_default_wrapper()
 
     cls = get_wrapper_class(wrapper)