Fix version handling in simplesam and pileup scripts to ensure compatibility and avoid errors

Author: mdshw5

scripts/pileup.py

@@ -7,6 +7,13 @@
 except ImportError:
     import pkg_resources
     version = lambda name: pkg_resources.get_distribution(name).version
+
+__version__ = "unknown"
+try:
+    __version__ = version("simplesam")
+except Exception:
+    pass
+
 from collections import deque
 from collections import Counter
 from collections import OrderedDict
@@ -84,7 +91,7 @@ def pileup(args):
 
 def main():
 	parser = argparse.ArgumentParser(prog='pileup', description="generate a simple pileup-like file from a sorted/indexed BAM file")
-	parser.add_argument('--version', action='version', version="%(prog)s version {0}".format(version("simplesam")))
+	parser.add_argument('--version', action='version', version="%(prog)s version {0}".format(__version__))
 
 	parser.add_argument('bam', type=argparse.FileType('r'), help="sorted/indexed BAM file ")
 	parser.add_argument('pileup', type=argparse.FileType('w'), help="pileup output file")

simplesam.py

@@ -31,7 +31,11 @@
 except ImportError: #python2
     from _multiprocessing import Connection
 
-__version__ = version("simplesam")
+__version__ = "unknown"
+try:
+    __version__ = version("simplesam")
+except Exception:
+    pass
 
 class DefaultOrderedDict(OrderedDict):
     def __init__(self, default, items=[]):