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TypeError: unpack_from() argument 1 must be string or read-only buffer, ... #14

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TypeError: unpack_from() argument 1 must be string or read-only buffer, ... #14

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22 changes: 11 additions & 11 deletions stratasys/manager.py
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -82,7 +82,7 @@ def pack(self, cartridge):
eeprom = bytearray(0x71)

# serial number
struct.pack_into("<d", eeprom, 0x0, cartridge.serial_number)
struct.pack_into("<d", eeprom, 0x00, cartridge.serial_number)
# material id
struct.pack_into("<d", eeprom, 0x08, material.get_id_from_name(cartridge.material_name))
# manufacturing lot
Expand Down Expand Up @@ -134,18 +134,18 @@ def unpack(self, cartridge_packed):
raise Exception("invalid current material quantity checksum")

# Serial number
serial_number = struct.unpack_from("<d", cartridge_packed, 0x0)[0]
serial_number = struct.unpack_from("<d", buffer(cartridge_packed), 0x00)[0]
# Material
material_name = material.get_name_from_id(int(struct.unpack_from("<d", cartridge_packed, 0x08)[0]))
material_name = material.get_name_from_id(int(struct.unpack_from("<d", buffer(cartridge_packed), 0x08)[0]))
# Manufacturing lot
manufacturing_lot = struct.unpack_from("<20s", cartridge_packed, 0x10)[0].split('\x00')[0]
manufacturing_lot = struct.unpack_from("<20s", buffer(cartridge_packed), 0x10)[0].split('\x00')[0]
# Manufacturing datetime
(mfg_datetime_year,
mfg_datetime_month,
mfg_datetime_day,
mfg_datetime_hour,
mfg_datetime_minute,
mfg_datetime_second) = struct.unpack_from("<HBBBBH", cartridge_packed, 0x28)
mfg_datetime_second) = struct.unpack_from("<HBBBBH", buffer(cartridge_packed), 0x28)
mfg_datetime = datetime.datetime(mfg_datetime_year + 1900,
mfg_datetime_month,
mfg_datetime_day,
Expand All @@ -158,23 +158,23 @@ def unpack(self, cartridge_packed):
use_datetime_day,
use_datetime_hour,
use_datetime_minute,
use_datetime_second) = struct.unpack_from("<HBBBBH", cartridge_packed, 0x30)
use_datetime_second) = struct.unpack_from("<HBBBBH", buffer(cartridge_packed), 0x30)
use_datetime = datetime.datetime(use_datetime_year + 1900,
use_datetime_month,
use_datetime_day,
use_datetime_hour,
use_datetime_minute,
use_datetime_second)
# Initial material quantity
initial_material_quantity = struct.unpack_from("<d", cartridge_packed, 0x38)[0]
initial_material_quantity = struct.unpack_from("<d", buffer(cartridge_packed), 0x38)[0]
# Version
version = struct.unpack_from("<H", cartridge_packed, 0x24)[0]
version = struct.unpack_from("<H", buffer(cartridge_packed), 0x24)[0]
# Key fragment
key_fragment = str(struct.unpack_from("<8s", cartridge_packed, 0x48)[0]).encode("hex")
key_fragment = str(struct.unpack_from("<8s", buffer(cartridge_packed), 0x48)[0]).encode("hex")
# Current material quantity
current_material_quantity = struct.unpack_from("<d", cartridge_packed, 0x58)[0]
current_material_quantity = struct.unpack_from("<d", buffer(cartridge_packed), 0x58)[0]
# Signature
signature = struct.unpack_from("<9s", cartridge_packed, 0x68)[0]
signature = struct.unpack_from("<9s", buffer(cartridge_packed), 0x68)[0]

return cartridge.Cartridge(serial_number, material_name, manufacturing_lot, mfg_datetime, use_datetime, initial_material_quantity, current_material_quantity, key_fragment, version, signature)

Expand Down