Examples: Python ShellBang & Executable (#2673)

* Examples: Python ShellBang & Executable

Make sure that all PICMI scripts and all analysis Python scripts
in `Examples/` are:
- executable (`chmod a+x`)
- start with a shell-bang to `python3`

Now, all scripts can be run directly without a `python3 ...` prefix
and also default to the only right executable of Python on older
systems. (New systems always have a `python3` alias, too.)

* Revert a moved numpy

2 files changed, 3 insertions, 1 deletions

diff --git a/Examples/Modules/embedded_boundary_python_API/PICMI_inputs_EB_API.py b/Examples/Modules/embedded_boundary_python_API/PICMI_inputs_EB_API.py
index bc56968d2..e350ce414 100644..100755
--- a/Examples/Modules/embedded_boundary_python_API/PICMI_inputs_EB_API.py
+++ b/Examples/Modules/embedded_boundary_python_API/PICMI_inputs_EB_API.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from pywarpx import picmi, _libwarpx, fields
 import numpy as np
 
diff --git a/Examples/Modules/embedded_boundary_python_API/analysis.py b/Examples/Modules/embedded_boundary_python_API/analysis.py
index b6b2955cf..09cc2accf 100755
--- a/Examples/Modules/embedded_boundary_python_API/analysis.py
+++ b/Examples/Modules/embedded_boundary_python_API/analysis.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#!/usr/bin/env python3
 
 # This script just checks that the PICMI file executed successfully.
 # If it did there will be a plotfile for the final step.