pyrets

Using python3, it supports the login, search, getmetadata and logout transaction.

rets_session = pyrets.RetsSession(user, passwd, user_agent, rets_version, login_url, user_agent_passwd)

#login, login is required before you do any other transactions
response_text = rets_session.login()
print(response_text)

#getmetadata
metadata_text = rets_session.getmetadata()
with open('./12meta.xml','w') as f:
    f.write(metadata_text)

#getobject    
object_bin = rets_session.getobject('Photo','Property','40621107:1')
with open('./a.jpg', 'wb') as f:
    f.write(object_bin)
    
#search
response = rets_session.search('Property', 'RE_1', '(L_ListingID=40621107)', 1, 'L_UpdateDate')
print(response)

#logout
response_text = rets_session.logout()  
print(response_text)