Any Python developers on here? Or UX developers?

Have a look at
http://stackoverflow.com/questions/4960208/python-2-7-getting-user-input-and-manipulating-as-string-without-quotations

using input instead of raw_input is ending up using a variable instead of a string (unless you're putting what you type in quotes).

Some alternative code to google

import pandas as pd
stations = pd.read_csv('stations.csv', names=['call_sign', 'station_name'])
my_callsign = raw_input("Please enter the callsign ")
print stations[stations.call_sign == my_callsign]

could also
print stations.head()
print stations[stations.station_name == 'Islington']