title: how to find parameter of the exponential distribution with bayes
body: <p>i have an list of values after use <code>np.random.exponential(alpha)</code>.</p>
  <pre><code>[1.4066,1.2917,1.4080,4.2801,1.2136,2.7461,11.1076,0.9247,5.8833,10.2513,3.8285,3.2116,0.5451,0.9896,1.1602,7.7723,0.1702,0.8907,0.2276,3.1197,11.4909,0.6475,11.2279,0.7639]
  </code></pre>
  <p>now,  from these values, how can i find back alpha with bayes method? I know that i can use mean, median to estimate the alpha but how about bayes? Thanks</p>