[Biopython] installing biopython1.53 failed

[xuxiang086]

dear all,

I was trying to install biopython1.53 source on my computer whose OS is Ubuntu according to the installation instructions on biopython wiki, and when I input "python setup.py test" I got failure messages as follows:

======================================================================
FAIL: seqmatchall with pair output piped to stdout.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "test_Emboss.py", line 661, in test_seqtmatchall_piped
    self.assertEqual(align.get_alignment_length(), 9)
AssertionError: 471 != 9
----------------------------------------------------------------------
Ran 140 tests in 102.013 seconds
FAILED (failures = 1)

Could you help me to figure out what's the problem? Thanks.

Sincerely,
Xiang