with open('population_txt.rtf') as f:
for line in f:
n, p = line.split('\t')
if n.startswith('G') and int(p.strip().replace('\\','')) > 500000:
print(n)
string = "Янкав, Сер, Заводск"
a = string.split(', ')
print("Это через цикл:")
for i in a:
print(i)
print('\nЭто в ручную:')
print(a[0])
print(a[1])
print(a[2])