fix warnings · s-martin/RPi-Jukebox-RFID@9ae8d8c

The job was canceled because "_3_9" failed.

Lint with flake8: components/controls/buttons_usb_encoder/buttons_usb_encoder.py#L31

E722 do not use bare 'except'

Lint with flake8: components/controls/buttons_usb_encoder/buttons_usb_encoder.py#L37

E722 do not use bare 'except'

Lint with flake8: components/controls/buttons_usb_encoder/io_buttons_usb_encoder.py#L31

E722 do not use bare 'except'

Lint with flake8: components/controls/buttons_usb_encoder/map_buttons_usb_encoder.py#L7

E402 module level import not at top of file

Lint with flake8: components/controls/buttons_usb_encoder/map_buttons_usb_encoder.py#L8

E402 module level import not at top of file

Lint with flake8: components/controls/buttons_usb_encoder/map_buttons_usb_encoder.py#L9

E402 module level import not at top of file

Lint with flake8: scripts/Reader.py#L48

E722 do not use bare 'except'

Lint with flake8: scripts/Reader.py.Multi#L52

E722 do not use bare 'except'

Lint with flake8: scripts/Reader.py.kkmoonRFIDreader#L47

E722 do not use bare 'except'

Lint with flake8: scripts/Reader.py.original#L54

E722 do not use bare 'except'

Lint with flake8: scripts/Reader.py.experimental.Multi#L161

F841 local variable 'pn532' is assigned to but never used

Lint with flake8: scripts/Reader.py.experimental.Multi#L161

F821 undefined name 'Pn532_i2c'

Lint with flake8: scripts/Reader.py.experimental.Multi#L162

F821 undefined name 'Mifare'

Lint with flake8: scripts/Reader.py.experimental.Multi#L164

F821 undefined name 'MIFARE_WAIT_FOR_ENTRY'

Lint with flake8: scripts/daemon_rfid_reader.py#L72

F841 local variable 'e' is assigned to but never used

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