Error talking to server: a bytes-like object is required, not 'str' - python3

[marif1989]

I am using the python3.
facing a many issues with python3 with this plugin. however i think i am very near to make this working..
I am facing below error...when i removed the proxy

./cron.ES.sh xxxxxxxxxx cssdev xxxxxxxxxxx xxxxxxxx xxxxxxxxxx ap-southeast-1
Error talking to server: a bytes-like object is required, not 'str'

if i keep the proxy I am getting below error...

Traceback (most recent call last):
File "/usr/lib/zabbix/externalscripts/zabbixCloudWatch.py", line 394, in
cw_data = getCloudWatchData(aws_account, aws_region, aws_service, dimensions)
File "/usr/lib/zabbix/externalscripts/zabbixCloudWatch.py", line 181, in getCloudWatchData
results = cw.get_metric_statistics(period, start_time, end_time, metric_name, namespace, statistics, dimensions)
File "/var/lib/zabbix/my_app/env/lib64/python3.6/site-packages/boto/ec2/cloudwatch/init.py", line 239, in get_metric_statistics
[('member', Datapoint)])
File "/var/lib/zabbix/my_app/env/lib64/python3.6/site-packages/boto/connection.py", line 1170, in get_list
response = self.make_request(action, params, path, verb)
File "/var/lib/zabbix/my_app/env/lib64/python3.6/site-packages/boto/connection.py", line 1116, in make_request
return self._mexe(http_request)
File "/var/lib/zabbix/my_app/env/lib64/python3.6/site-packages/boto/connection.py", line 913, in _mexe
self.is_secure)
File "/var/lib/zabbix/my_app/env/lib64/python3.6/site-packages/boto/connection.py", line 705, in get_http_connection
return self.new_http_connection(host, port, is_secure)
File "/var/lib/zabbix/my_app/env/lib64/python3.6/site-packages/boto/connection.py", line 747, in new_http_connection
connection = self.proxy_ssl(host, is_secure and 443 or 80)
File "/var/lib/zabbix/my_app/env/lib64/python3.6/site-packages/boto/connection.py", line 796, in proxy_ssl
sock.sendall("CONNECT %s HTTP/1.0\r\n" % host)
TypeError: a bytes-like object is required, not 'str'

Could you please provide some hint to make it work?