def send_out(**kwargs):
result = ''
if kwargs:
result = '?' + '&'.join(f'{k}={v}' for k, v in kwargs.items())
return result
query_str = send_out(limit=1, start=1)
print(query_str)
query_str = send_out(start=1)
print(query_str)
query_str = send_out()
print(query_str)
#r = requests.get('https://hui' + query_str)
ZGVmIHNlbmRfb3V0KCoqa3dhcmdzKToKICAgIHJlc3VsdCA9ICcnCiAgICBpZiBrd2FyZ3M6CiAgICAgICAgcmVzdWx0ID0gJz8nICsgJyYnLmpvaW4oZid7a309e3Z9JyBmb3IgaywgdiBpbiBrd2FyZ3MuaXRlbXMoKSkKICAgIHJldHVybiByZXN1bHQKCgpxdWVyeV9zdHIgPSBzZW5kX291dChsaW1pdD0xLCBzdGFydD0xKQpwcmludChxdWVyeV9zdHIpCnF1ZXJ5X3N0ciA9IHNlbmRfb3V0KHN0YXJ0PTEpCnByaW50KHF1ZXJ5X3N0cikKcXVlcnlfc3RyID0gc2VuZF9vdXQoKQpwcmludChxdWVyeV9zdHIpCiNyID0gcmVxdWVzdHMuZ2V0KCdodHRwczovL2h1aScgKyBxdWVyeV9zdHIp