support for negative number in FORMAT (patch).

[brentp]

Otherwise, can get an error on output from samtools.

diff --git a/vcf.py b/vcf.py
index e52ebd9..103bbef 100644
--- a/vcf.py
+++ b/vcf.py
@@ -130,7 +130,7 @@ class _vcf_metadata_parser(object):
             >''', re.VERBOSE)
         self.format_pattern = re.compile(r'''\#\#FORMAT=<
             ID=(?P<id>.+),
-            Number=(?P<number>\d+|\.|[AG]),
+            Number=(?P<number>-?\d+|\.|[AG]),
             Type=(?P<type>.+),
             Description="(?P<desc>.*)"
             >''', re.VERBOSE)

[martijnvermaat]

In my branch, this is commit martijnvermaat/PyVCF@be8c5f3

[brentp]

ah. that's better. i just got it far enough not to error on my data.

[jamescasbon]

committed 'git cherry-pick be8c5f31e13bad1b77622acab25968a8af6e6455'