Error in import from obspy.core

Hi all
I have made a script to extract waves and make daily plot.
It work well until 23 october when I receive this error:

Traceback (most recent call last):
  File "/home/protcivile/seiscomp3/bin/scwave", line 22, in <module>
    from obspy.core import read,UTCDateTime
  File "/usr/local/lib/python2.7/dist-packages/obspy/__init__.py", line 36, in <module>
    import requests
  File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 58, in <module>
    from . import utils
  File "/usr/lib/python2.7/dist-packages/requests/utils.py", line 26, in <module>
    from .compat import parse_http_list as _parse_list_header
  File "/usr/lib/python2.7/dist-packages/requests/compat.py", line 42, in <module>
    from .packages.urllib3.packages.ordered_dict import OrderedDict
ImportError: No module named ordered_dict

Can anybody help me to correct these errors?

Best regards,

Sergio

This looks weird, since system packages usually only get security updates but it looks like your requests package is broken somehow. What distribution are you running?