plotting categorical data pandas/bokeh
<p>I have a pandas dataframe which gives the number of pass and fail students in every subject. I want to generate a plot which gives pass and fail for every subject. I tried groupby method but i can get a plot for a single one. I want a plot which has subject names as x-axis and no. of pass and fails in y-axis. Here is the sample dataframe.</p>

<pre><code>10IS665 10ISL67 10ISL68
F        F        P
F        F        P
P        P        F
p        P        P
p        P        P
p        F        F
</code></pre>