The py_compile module provides a single function to generate
a byte-code file from a source file.
Though not often needed, this function can be useful when installing
modules for shared use, especially if some of the users may not have
permission to write the byte-code cache files in the directory
containing the source code.
Compile a source file to byte-code and write out the byte-code cache
file. The source code is loaded from the file name file. The
byte-code is written to cfile, which defaults to file+'c' ('o' if optimization is enabled in the
current interpreter). If dfile is specified, it is used as
the name of the source file in error messages instead of file.