Read C++ and Makefile files into Python file

This commit provides a utility to read the C++ and Makefile files into
a Python file so that the code can be updated via a script when a new
C++ version is available. This is a halfway house to automatically
generating the C++, as it is not possible to create a shared object
library directly from Python.

Also updates .gitignore to ignore compiled Python files.

Author: DanShort12

.gitignore

@@ -30,3 +30,6 @@
 *.exe
 *.out
 *.app
+
+# Compiled Python
+*.pyc

parametric_plasma_source/build_python.py

@@ -0,0 +1,36 @@
+import os
+
+plasma_source_cpp = "plasma_source.cpp"
+plasma_source_hpp = "plasma_source.hpp"
+source_sampling_cpp = "source_sampling.cpp"
+make_file = "Makefile"
+
+py_file = "source.py"
+
+if os.path.exists(py_file):
+    os.remove(py_file)
+
+def write_disclaimer(py_file_path):
+    disclaimer = "\"\"\"\n"
+    disclaimer += "Auto-generated file. To edit, run `python build_python.py`.\n"
+    disclaimer += "This will need to be run whenever a new C++ version is made available.\n"
+    disclaimer += "\"\"\"\n\n"
+    with open(py_file_path, "a+") as f_py:
+        f_py.write(disclaimer)
+
+def generate_variable(cpp_file_path, variable_name, py_file_path, end_str="\n\n"):
+    with open(cpp_file_path, "r") as f_cpp:
+        lines = f_cpp.readlines()
+        py_lines = variable_name
+        py_lines += " = (\n\"\"\""
+        py_lines += "".join(lines)
+        py_lines += "\"\"\"\n)"
+        py_lines += end_str
+        with open(py_file_path, "a+") as f_py:
+            f_py.write(py_lines)
+
+write_disclaimer(py_file)
+generate_variable(source_sampling_cpp, "source_sampling_cpp", py_file)
+generate_variable(plasma_source_cpp, "plasma_source_cpp", py_file)
+generate_variable(plasma_source_hpp, "plasma_source_hpp", py_file)
+generate_variable(make_file, "make_file", py_file, "\n")