Use env import instead of changing the module search path by hand in run scripts

scripts/env.py

+import sys
+import os
+
+# append module root directory to sys.path
+sys.path.append(
+    os.path.dirname(
+        os.path.dirname(
+            os.path.abspath(__file__)
+        )
+    )
+)

scripts/run_blastp.py

 #!/usr/bin/env python3
-import os
-import sys
-# add psot libraries to module search path
-sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
-
+import env
 import argparse
 from psot import config
 from os import system

scripts/run_ghostx.py

 #!/usr/bin/env python3
-import os
-import sys
-# add psot libraries to module search path
-sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
-
+import env
 import argparse
 import re
 from os import system,makedirs

scripts/run_hmmer.py

 #!/usr/bin/env python3
-import os
-import sys
-# add psot libraries to module search path
-sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
-
+import env
 import argparse
 from psot import config
 from os import system, makedirs

scripts/run_signalp.py

 #!/usr/bin/env python3
-import os
-import sys
-# add psot libraries to module search path
-sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
-
+import env
 import argparse
 from psot import config
 from os import system