use sys.path.insert() instead of sys.path.append() to avoid conflicts with other python packages

tools/python/dump2cfg.py

@@ -11,7 +11,7 @@
 
 import sys,os
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from dump import dump
 from cfg import cfg
 

tools/python/dump2pdb.py

@@ -13,7 +13,7 @@
 
 import sys,os
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from dump import dump
 from pdbfile import pdbfile
 

tools/python/dump2xyz.py

@@ -11,7 +11,7 @@
 
 import sys,os
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from dump import dump
 from xyz import xyz
 

tools/python/dumpsort.py

@@ -10,7 +10,7 @@
 
 import sys,os
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from dump import dump
 
 if len(sys.argv) != 4:

tools/python/log2txt.py

@@ -14,7 +14,7 @@ from __future__ import print_function
 
 import sys,os,argparse
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from log import log
 
 # set up arg parser

tools/python/logplot.py

@@ -10,7 +10,7 @@
 
 import sys,os,code
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from log import log
 from gnu import gnu
 

tools/python/neb_combine.py

@@ -11,7 +11,7 @@
 
 import sys,os
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from dump import dump
 
 # parse args

tools/python/neb_final.py

@@ -11,7 +11,7 @@
 
 import sys,os
 path = os.environ["LAMMPS_PYTHON_TOOLS"]
-sys.path.append(path)
+sys.path.insert(1,path)
 from dump import dump
 
 # parse args