python module import error

Question

I am using macports to install various modules. Generally this works well, but below is an error I am getting that I am not easily resolving:

$ python
Python 2.6.6 (r266:84292, Feb 12 2011, 16:57:53) 
[GCC 4.2.1 (Apple Inc. build 5664)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import dns
>>> import opcode
>>> from dns import resolver
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dns/resolver.py", line 26, in <module>
 import dns.message
 File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dns/message.py", line 28, in <module>
 import dns.opcode
ImportError: No module named opcode

Could this be a path issue?

>>> import sys
>>> sys.path
['', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python26.zip', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-darwin', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac/lib-scriptpackages', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-old', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-dynload', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages', '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg-info']

$ cat /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dns/init.py [snipped comments] # init.py for DNS class.

__version__ = '2.3.3'
import Type,Opcode,Status,Class
from Base import DnsRequest, DNSError
from Lib import DnsResult
from Base import *
from Lib import *
Error=DNSError
from lazy import *
Request = DnsRequest
Result = DnsResult

Thanks in advance.

• Herberth Amaral: from dns import resolver doesn't work? Can you post the content of __init__.py inside /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dns/?

Answer 1

Because you need to do:

from dns import resolver

This doesn't work:

import datetime.datetime

But this does:

from datetime import datetime

If you're importing a package that is part of another package, you need to use the "from" syntax

• tkone: have you tried import dns, resolver = dns.resolver? You've already got the dns package imported.
• galaxywatcher: I have tried that now, and I still get an error: AttributeError: 'module' object has no attribute 'resolver'
• galaxywatcher: I am able to import other modules from dns with no problem: tokenizer, reversename, ipv6, etc. Only resolver produces an error.
• galaxywatcher: Ok. Found some other packages from dns that produce an error: update, win32dns, e164, (just noticed that the package Opcode is not lower case - wondering if that has something to do with it), message, haven't tested them all.

Answer 2

I uninstalled py26-dnspython and reinstalled. Problem solved. Fink on freenode made the suggestion. Thanks.

Answer 3

I am using Python 3.7 and I installed pubdns. This resolved my problem. I faced extreme difficulty in using py3dns, pyDNS (won't install), dnspython and many more