title: Issues importing mlxtend python
body: <p>I'm new to python, so apologies if this is a silly question. </p>
  
  <p>I'm trying to use mlxtend, and have installed it using pip. Pip confirms that it is installed (when I type "pip install mlxtend" it notes that the requirement is already satisfied). However, when I try and import mlxtend in python using "import mlxtend as ml", I get the error: "ModuleNotFoundError: No module named 'mlxtend'". I used the same process for installing and importing pandas and numpy, and they both worked. Any advice?</p>
  
  <p>I should note that I have resorted to dropping in the specific code I need from mlxtend (apriori and association rules), which is working, but hardly a good long term strategy!</p>
  
  <p>I'm using python version 3.6.5. </p>
  
  <p>Thanks!</p>