import re
s='''1.29.7D59                       ; This field should not be edited
SE5C620.86B.00.01   ; This field should not be edited
I/O Sensitive               ;Options: Balanced=00: I/O Sensitive=02
POR - Reg. Value:0x1F                 ;Options: 0.0%=00: 0.1%=01'''
lines = s.split('\n')
res = []
for line in lines:
	res.append(re.split(r'\s*;', line)[0])
print(res)