parse_ddg_data.py

import pandas as pd

def get_mutant_part_of_string(s):
    return s.split()[1][-1]

df = pd.read_csv('/home/kyle/Downloads/uby_1ubq.tsv', sep='\t')
print df.head()
df.loc[:,'mut_aa'] = pd.Series(df['Mutation'].apply(get_mutant_part_of_string), index=df.index)
print df.head()

print df[ df.mut_aa == 'C' ].head()