Need help in re module of python - regex

Question

I'm trying to use the re module to parse through a file. I tried three version of the code, first 2 version's are not retrieving any O/P. The third version is retrieving only one line. Can someone please have a look?
Version1:
import re
file = open('sample.txt', 'r')
x = file.readline()
while x:
var = re.findall(r'(?:\*|\*>)\s+(\d+.\d+.\d+.\d+\/\d+\s+)?(\S+)\s+\d+\s+(\d+\s+.+)[ie]',x)
x = file.readline()
print(var)
file.close()
Version2:
import re
file = open('sample.txt', 'r')
x = file.read()
var = re.findall(r'(?:\*|\*>)\s+(\d+.\d+.\d+.\d+\/\d+\s+)?(\S+)\s+\d+\s+(\d+\s+.+)[ie]',x)
print(var)
file.close()
Version3:
import re
file = open('sample.txt', 'r')
x = file.readline()
while x:
var = re.search(r'(?:\*|\*>)\s+(\d+.\d+.\d+.\d+\/\d+\s+)?(\S+)\s+\d+\s+(\d+\s+.+)[ie]',x, re.M)
x = file.readline()
print(var.group(0))
file.close()
The data in sample.txt is as below. The network is blank after first line, and when I'm running individually these statements on python shell the regex is working.
Oregon Exchange BGP Route Viewer
route-views.oregon-ix.net / route-views.routeviews.org
This hardware is part of a grant by the NSF.
Please contact help#routeviews.org if you have questions, or
if you wish to contribute your view.
Network Next Hop Metric LocPrf Weight Path
* 64.48.0.0/16 173.205.57.234 0 53364 3257 2828 i
* 202.232.0.2 0 2497 2828 i
* 93.104.209.174 0 58901 51167 1299 2828 i
* 193.0.0.56 0 3333 2828 i
* 103.197.104.1 0 134708 3491 2828 i
* 132.198.255.253 0 1351 6939 2828 i

Answer 1

I think this will do the trick:
import re
thelist = [
"* 64.48.0.0/16 173.205.57.234 0 53364 3257 2828 i",
"* 93.104.209.174 0 58901 51167 1299 2828 i",
"* 193.0.0.56 0 3333 2828 i",
]
regex = re.compile("\*\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\/\d{1,3})?\s+([\S]+)\s+([^i]+i)")
for text in thelist:
match = re.search(regex, text)
if match:
print ("yuppers")
print (match.group(1))
print (match.group(2))
print (match.group(3))
print ("\n")
else:
print ("nope")
results
yuppers
64.48.0.0/16
173.205.57.234
0 53364 3257 2828 i
yuppers
None
93.104.209.174
0 58901 51167 1299 2828 i
yuppers
None
193.0.0.56
0 3333 2828 i
Depending on what you actually want to do with each, you can just fiddle with the results. The regex makes the network optional which might have been tripping you up. Hopefully this gets you in the right direction!