title: AttributeError: module 'meep' has no attribute 'Vector3'
body: <p>I've installed <a href="https://anaconda.org/conda-forge/pymeep" rel="nofollow noreferrer">pymeep</a> using the anaconda environment. Unfortunately, when I use Spyder to try to run use a Vector3 class from meep i get the error: </p>
  
  <p>AttributeError: module 'meep' has no attribute 'Vector3'</p>
  
  <p>Does anyone have any idea how to fix it? I have already tried using the recommended environment: </p>
  
  <pre><code>conda create -n mp -c chogan -c defaults -c conda-forge pymeep
  </code></pre>
  
  <p>to no use.</p>
  
  <p>The code where I'm using this is the first tutorial/example from <a href="https://meep.readthedocs.io/en/latest/Python_Tutorials/Basics/" rel="nofollow noreferrer">here:</a></p>
  
  <pre><code>import meep as mp
  cell = mp.Vector3(16, 8, 0)
  geometry = [mp.Block(mp.Vector3(1e20, 1, 1e20),
                       center=mp.Vector3(0, 0),
                       material=mp.Medium(epsilon=12))]
  
  sources = [mp.Source(mp.ContinuousSource(frequency=0.15),
                       component=mp.Ez,
                       center=mp.Vector3(-7,0))]
  
  pml_layers = [mp.PML(1.0)]
  
  resolution = 10
  
  sim = mp.Simulation(cell_size=cell,
                      boundary_layers=pml_layers,
                      geometry=geometry,
                      sources=sources,
                      resolution=resolution)
  
  sim.run(until=200)
  </code></pre>