## set_metered_key(public_key, private_key) {#str_str} Sets metered public and private key. If you purchase metered license, when start application, this API should be called, normally, this is eno......save(file_name=ARTIFACTS_DIR + 'Metered.Usage.pdf')...'Document.docx') doc.save(ARTIFACTS_DIR + 'Metered.usage.pdf')...