  CALLISTO is a radio spectrometer designed to monitor the transient radio
emissions/bursts originated from the solar corona in the frequency range
$45-870$ MHz. At present, there are $\gtrsim 150$ stations (together forms an
e-CALLISTO network) around the globe continuously monitoring the Sun 24 hours a
day. We have developed a pyCallisto, a python library to process the CALLISTO
data observed by all stations of the e-CALLISTO network. In this article, we
demonstrate various useful functions that are routinely used to process the
CALLISTO data with suitable examples. This library is not only efficient in
processing the data but plays a significant role in developing automatic
classification algorithms of different types of solar radio bursts.
