title: Python Pandas - Unknown engine: c
body: <p>I am trying to run the following code but I receive the error message <code>ValueError: Unknown engine: c</code></p>
  
  <p>Do I need to install something or?</p>
  
  <pre><code>sample = pd.read_excel(filePath, nrows=100)
  float_cols = [c for c in sample if sample[c].dtype == "float64"]
  float32_cols = {c: np.float32 for c in float_cols}
  
  mainFile= pd.read_excel(filePath, engine='c', dtype=float32_cols)
  </code></pre>