botocore.exceptions.ClientError: An error occurred (InvalidInstanceID.Malformed) - python-3.x

Question

Any suggestion pls, Here is the code, works fine if i call function as get_instance_name ('i-0368cdfdded') and error i get is
Tried ids.txt as both 'i-xxxx' or i-xxx
botocore.exceptions.ClientError: An error occurred (InvalidInstanceID.Malformed) when calling the DescribeInstances operation: Invalid id: "i-xxxxxx"
import boto3
AWS_REGION = "us-west-2"
AWS_PROFILE = "profilex"
session=boto3.session.Session(profile_name=AWS_PROFILE)
ec2 = session.resource('ec2', region_name=AWS_REGION)
def get_instance_name(fid):
i = ec2.Instance(fid)
instancename = ''
for tags in i.tags:
if tags["Key"] == 'Name':
instancename = tags["Value"]
return instancename
with open('ids.txt') as f:
for line in f:
get_instance_name ('line')

Answer 1

so what i found is i get expected output when i run the program in interactive python terminal but not run as program. I am not able to figure that out why, but the program itself works on console. Here is what i ran last which worked. ( I was doing many trial & errors )
import boto3
import sys
import os
import json
AWS_REGION = "us-west-2"
AWS_PROFILE = "xxxx"
session=boto3.session.Session(profile_name=AWS_PROFILE)
ec2 = session.resource('ec2', region_name=AWS_REGION)
def get_instance_name(fid):
i = ec2.Instance(fid)
instancename = ''
for tags in i.tags:
if tags["Key"] == 'Name':
instancename = tags["Value"]
return instancename
filename="xxx.txt"
with open(filename) as file:
while (line := file.readline().rstrip()):
#print(line)
get_instance_name(line)