Add --version and fix flake8 errors

src/tb_variant_filter/__init__.py

@@ -12,6 +12,10 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+__version_info__ = ('0', '4', '1')
+__version__ = '.'.join(__version_info__)
+
 from dataclasses import dataclass
 from functools import wraps
 

src/tb_variant_filter/cli.py

@@ -17,6 +17,7 @@
 
 import vcfpy
 
+from . import __version__
 from .filters import get_filters, UnionFilter
 
 
@@ -51,6 +52,7 @@ def main():
     parser = argparse.ArgumentParser(
         description="Filter variants from a VCF file (relative to M. tuberculosis H37Rv)"
     )
+    parser.add_argument('--version', action='version', version=__version__, help="Print version and exit")
     parser.add_argument(
         "input_file",
         type=argparse.FileType(),

src/tb_variant_filter/filters/alt_percentage_filter.py

@@ -63,7 +63,7 @@ def __repr__(self) -> str:
     def __call__(self, record: vcfpy.Record) -> Union[vcfpy.Record, None]:
         # VCF records have 1 (or 0?) or more ALT records supported by calls from 1 or more samples
         # and (sometimes) AO INFO fields with dimension matching the ALT dimensions. Or AF1 or DP4
-        # or... there really is not standard way of representing ALT allele frequency in 
+        # or... there really is not standard way of representing ALT allele frequency in
         # VCF - see this discussion: https://github.com/samtools/hts-specs/issues/78
         # This Transform type Filter retains only those ALTs and corresponding INFO matching the
         # criteria of the filter