title: Efficienty reading > 500 MB xlsx into R and Python
body: <p>Everything works fine for me in <code>R</code> and <code>Python</code>. However, I'm not able to read > 500 MB <code>xlsx</code> having three sheets into <code>R</code> and <code>Python</code>. Would like to know what are the efficient methods to read a very lager size <code>xlsx</code> into <code>R</code> and <code>Python</code>. Thanks</p>