def _compile(self, filename, source): """ Compiles the Python source code to a code object and attempts to write it to an appropriate .pyc file. May raise SyntaxError or other errors generated by the compiler. """ if source and source[-1] != '\n': source = source + '\n' code = __builtin__.compile(source, filename.toOsSpecific(), 'exec') # try to cache the compiled code pycFilename = Filename(filename) pycFilename.setExtension(compiledExtensions[0]) try: f = open(pycFilename.toOsSpecific(), 'wb') except IOError: pass else: f.write('\0\0\0\0') f.write(struct.pack('<I', self.timestamp)) f.write(marshal.dumps(code)) f.flush() f.seek(0, 0) f.write(imp.get_magic()) f.close() return code