title: ImportError: No module named BIO
body: <p>I'm very new in programming, and so in Python. Subsequently, I have a problem I don't know how to solve.</p>
  
  <p>I'm working on a Mac OS with a script designed to work with BioPython. I think that after a lot of work I finally had got BioPython installed correctly, after trying lots of times to install NumPY, but when I try to run my script I get this error: </p>
  
  <pre><code>ImportError: No module named Bio
  </code></pre>
  
  <p>My script begins like this:</p>
  
  <pre><code>#!/usr/bin/python
  from Bio import SeqIO
  secuencias=SeqIO.parse("/Users/imac/Documents/Gradiente
  glaciares/Secuencias/Rocas/Rocas_Pia/Roca_Pia0.fna", "fasta")
  </code></pre>
  
  <p>I've also tried to insert first:</p>
  
  <pre><code>sys.path.insert(0, "//Users//imac//Desktop//BioPython")
  </code></pre>
  
  <p>to make the script read from other directory, but then I have: </p>
  
  <pre><code>NameError: name 'sys' is not defined
  </code></pre>
  
  <p>Finally I tried to import the Bio module from the Python path and there I have no problems to do it, so I think the module will be installed correctly.</p>
  
  <p>What can I do?</p>
  
  <p>Thanks a lot</p>