Zebrafy

Submodules

zebrafy.zebrafy_image module

zebrafy.zebrafy_pdf module

zebrafy.zebrafy_zpl module

zebrafy.crc module

class zebrafy.crc.CRC(data_bytes, poly=None)[source]

Bases: object

Utility class to calculate CRC-16-CCITT algorithm across the received data bytes.

CRC-16-CCITT polynomial representation: x^{16} + x^{12} + x^5 + 1

Parameters:

data_bytes (bytes) – Bytes object for which to calculate CRC
poly (int) – Reversed polynomial representation for CRC-16-CCITT calculation, defaults to 0x8408

property data_bytes

attrgetter(attr, …) –> attrgetter object

Return a callable object that fetches the given attribute(s) from its operand. After f = attrgetter(‘name’), the call f(r) returns r.name. After g = attrgetter(‘name’, ‘date’), the call g(r) returns (r.name, r.date). After h = attrgetter(‘name.first’, ‘name.last’), the call h(r) returns (r.name.first, r.name.last).

get_crc_hex_string()[source]

Get CRC-16-CCITT as four digit zero padding hexadecimal string.

Return type:: str
Returns:: CRC-16-CCITT as four digit zero padding hexadecimal string

property poly