Calls the other string makers

def _initstr(modname, imports, from_imports, inject_execstr, withheader=True):
    """ Calls the other string makers """
    header         = _make_module_header() if withheader else ''
    import_str     = _make_imports_str(imports, modname)
    fromimport_str = _make_fromimport_str(from_imports, modname)
    initstr = '\n'.join([str_ for str_ in [
        header,
        import_str,
        fromimport_str,
        inject_execstr,
    ] if len(str_) > 0])
    return initstr