title: Is it a PyVISA installation failure ? Or, am I doing something wrong?
body: <p>I wanted to test my PyVISA installation and got a certain failure:</p>
  
  <pre><code>&gt;&gt;&gt; import visa
  &gt;&gt;&gt; rm = visa.ResourceManager()
  Traceback (most recent call last):
  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  File "C:\Program Files\Python35\lib\site-packages\pyvisa\highlevel.py", line 1
  488, in __new__
  visa_library = open_visa_library(visa_library)
  File "C:\Program Files\Python35\lib\site-packages\pyvisa\highlevel.py", line 1
  460, in open_visa_library
  return cls(argument)
  File "C:\Program Files\Python35\lib\site-packages\pyvisa\highlevel.py", line 9
  6, in __new__
  raise OSError('Could not open VISA library:\n' + '\n'.join(errs))
  OSError: Could not open VISA library:
  
  &gt;&gt;&gt;
  </code></pre>
  
  <p>What could be my problem ?</p>
  
  <p>I have tried to update the VISA path:</p>
  
  <pre><code>&gt;&gt;&gt; rm = ResourceManager('C:\Program Files\Python35\Lib\site-packages')
  Traceback (most recent call last):
  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  NameError: name 'ResourceManager' is not defined
  &gt;&gt;&gt; visalib = VisaLibrary('C:\Program Files\Python35\Lib\site-packages')
  Traceback (most recent call last):
  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  NameError: name 'VisaLibrary' is not defined
  &gt;&gt;&gt; rm = ResourceManager('C:/Program Files/Python35/Lib/site-packages')
  Traceback (most recent call last):
  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  NameError: name 'ResourceManager' is not defined
  &gt;&gt;&gt; import visa
  &gt;&gt;&gt; rm = ResourceManager('C:\Program Files\Python35\Lib\site-packages')
  Traceback (most recent call last):
  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  NameError: name 'ResourceManager' is not defined
  &gt;&gt;&gt;
  </code></pre>
  
  <p>Without any success</p>