Sum similar items

[bowlofred]

You can treat it like any dict. You can read the elements with .keys(), the count value with .values(), or both together with .items()

from collections import Counter
with open ("prdcs_file.txt", 'r') as pr_host :
    c = Counter(x.split(',')[1] for x in pr_host.read().splitlines())

print('\n'.join(f"{k}, {v}" for k,v in c.items()))

Output:
DV1, 1
PHQ, 4
ATC, 3
DG2, 1
TGP_H, 1
TCP_H, 2

Or if you want them in order by greatest count, you can use most_common() in place of items()

from collections import Counter
with open ("prdcs_file.txt", 'r') as pr_host :
    c = Counter(x.split(',')[1] for x in pr_host.read().splitlines())

print('\n'.join(f"{k}, {v}" for k,v in c.most_common()))

Output:
PHQ, 4
ATC, 3
TCP_H, 2
DV1, 1
DG2, 1
TGP_H, 1