def seguid(self):
"""Returns the SEGUID for the Dseq. The definition
varies with the amount of stagger between the sequences."""
rc_ovhg = len(self.watson) - len(self.crick) + self._ovhg
if self._ovhg == rc_ovhg == 0:
return _seg(min(self.watson, self.crick))
if self._ovhg < rc_ovhg:
w = self.watson
c = self.crick
o = self._ovhg
elif self._ovhg > rc_ovhg:
w = self.crick
c = self.watson
o = rc_ovhg
elif self._ovhg == rc_ovhg:
w, c = sorted((self.watson, self.crick))
o = self._ovhg
return _seg(_pretty_str(o) + w + "|" + c)
def seguid(self):
'''Returns the url safe SEGUID [#]_ for the sequence.
This checksum is the same as seguid but with base64.urlsafe
encoding [#]_ instead of the normal base 64. This means that
the characters + and / are replaced with - and _ so that
the checksum can be a part of and URL or a filename.
Examples
--------
>>> from pydna.seqrecord import SeqRecord
>>> a=SeqRecord("aaaaaaa")
>>> a.seguid() # original seguid is +bKGnebMkia5kNg/gF7IORXMnIU
'-bKGnebMkia5kNg_gF7IORXMnIU'
References
----------
.. [#] http://wiki.christophchamp.com/index.php/SEGUID'''
return _seg(str(self.seq))
