src+tests: use flake8 F401 to detect unused imports

.flake8

@@ -4,8 +4,6 @@ ignore =
     E221,
     # E241: multiple spaces after comma
     E241,
-    # F401: module imported but unused
-    F401,
     # E402: module level import not at top of file
     E402,
     # E501: line too long

src/apps/common/request_passphrase.py

@@ -1,9 +1,9 @@
-from trezor import res, ui, wire
+from trezor import ui, wire
 from trezor.messages import ButtonRequestType, wire_types
 from trezor.messages.ButtonRequest import ButtonRequest
 from trezor.messages.FailureType import ActionCancelled, ProcessError
 from trezor.messages.PassphraseRequest import PassphraseRequest
-from trezor.ui.entry_select import DEVICE, HOST, EntrySelector
+from trezor.ui.entry_select import DEVICE, EntrySelector
 from trezor.ui.passphrase import CANCELLED, PassphraseKeyboard
 from trezor.ui.text import Text
 from apps.common import storage

src/apps/common/signverify.py

@@ -1,5 +1,4 @@
 from ubinascii import hexlify
-from micropython import const
 from trezor.crypto.hashlib import sha256
 from trezor.utils import chunks, split_words
 from apps.common.hash_writer import HashWriter

src/apps/debug/__init__.py

@@ -2,9 +2,7 @@ import micropython
 import gc
 from uctypes import bytes_at, bytearray_at
 
-from trezor import log
 from trezor import loop
-from trezor.utils import unimport
 from trezor.wire import register, protobuf_workflow
 from trezor.messages.wire_types import \
     DebugLinkDecision, DebugLinkGetState, DebugLinkStop, \

src/apps/ethereum/__init__.py

@@ -1,7 +1,7 @@
 from trezor.wire import register, protobuf_workflow
 from trezor.utils import unimport
-from trezor.messages.wire_types import \
-    EthereumGetAddress, EthereumSignTx, EthereumSignMessage, EthereumVerifyMessage
+from trezor.messages.wire_types import EthereumGetAddress, EthereumSignTx
+# from trezor.messages.wire_types import EthereumSignMessage, EthereumVerifyMessage
 
 
 @unimport

src/apps/ethereum/get_address.py

@@ -1,4 +1,4 @@
-from trezor import wire, ui
+from trezor import ui
 
 
 async def layout_ethereum_get_address(ctx, msg):

src/apps/ethereum/layout.py

@@ -1,5 +1,5 @@
 from apps.common.confirm import *
-from trezor import wire, ui
+from trezor import ui
 from trezor.utils import chunks, format_amount
 from trezor.messages import ButtonRequestType
 from trezor.ui.text import Text

src/apps/homescreen/homescreen.py

@@ -1,4 +1,4 @@
-from trezor import ui, loop, res
+from trezor import ui, res
 from trezor.utils import unimport
 
 

src/apps/management/backup_device.py

@@ -1,4 +1,4 @@
-from trezor import ui, wire
+from trezor import wire
 from trezor.messages.FailureType import ProcessError
 from trezor.messages.Success import Success
 from apps.common import storage

src/apps/wallet/get_entropy.py

@@ -1,4 +1,4 @@
-from trezor import wire, ui
+from trezor import ui
 
 
 async def layout_get_entropy(ctx, msg):
@@ -15,7 +15,6 @@ async def layout_get_entropy(ctx, msg):
 async def _show_entropy(ctx):
     from trezor.messages.ButtonRequestType import ProtectCall
     from trezor.ui.text import Text
-    from trezor.ui.container import Container
     from ..common.confirm import require_confirm
 
     await require_confirm(ctx, Text(

src/main.py

@@ -1,4 +1,4 @@
-import boot
+import boot  # noqa: F401
 
 from trezor import io
 from trezor import log

src/trezor/__init__.py

@@ -1,2 +1,2 @@
-import trezorconfig as config
-import trezorio as io
+import trezorconfig as config  # noqa: F401
+import trezorio as io          # noqa: F401

src/trezor/crypto/__init__.py

@@ -1,7 +1 @@
-from trezorcrypto import bip32
-from trezorcrypto import bip39
-from trezorcrypto import chacha20poly1305
-from trezorcrypto import crc
-from trezorcrypto import pbkdf2
-from trezorcrypto import random
-from trezorcrypto import rfc6979
+from trezorcrypto import bip32, bip39, chacha20poly1305, crc, pbkdf2, random, rfc6979  # noqa: F401

src/trezor/crypto/curve.py

@@ -1,4 +1 @@
-from trezorcrypto import curve25519
-from trezorcrypto import ed25519
-from trezorcrypto import nist256p1
-from trezorcrypto import secp256k1
+from trezorcrypto import curve25519, ed25519, nist256p1, secp256k1  # noqa: F401

src/trezor/crypto/hashlib.py

@@ -1,9 +1 @@
-from trezorcrypto import blake256
-from trezorcrypto import blake2b
-from trezorcrypto import blake2s
-from trezorcrypto import ripemd160
-from trezorcrypto import sha1
-from trezorcrypto import sha256
-from trezorcrypto import sha512
-from trezorcrypto import sha3_256
-from trezorcrypto import sha3_512
+from trezorcrypto import blake256, blake2b, blake2s, ripemd160, sha1, sha256, sha512, sha3_256, sha3_512  # noqa: F401

src/trezor/ui/passphrase.py

@@ -1,8 +1,8 @@
 from micropython import const
 from trezor import io, loop, ui, res
 from trezor.ui import display
-from trezor.ui.button import BTN_CLICKED, ICON, Button
-from trezor.ui.swipe import SWIPE_HORIZONTAL, SWIPE_LEFT, SWIPE_RIGHT, Swipe
+from trezor.ui.button import BTN_CLICKED, Button
+from trezor.ui.swipe import SWIPE_HORIZONTAL, SWIPE_LEFT, Swipe
 
 SPACE = res.load(ui.ICON_SPACE)
 

src/trezor/ui/text.py

@@ -1,8 +1,6 @@
 from micropython import const
 from trezor import ui
-from trezor.ui import display
 
-DISPLAY_WIDTH = const(240)
 TEXT_HEADER_HEIGHT = const(48)
 TEXT_LINE_HEIGHT = const(26)
 TEXT_MARGIN_LEFT = const(14)

src/trezor/utils.py

@@ -1,7 +1,7 @@
 import sys
 import gc
 
-from trezorutils import halt, memcpy, set_mode_unprivileged, symbol
+from trezorutils import halt, memcpy, set_mode_unprivileged, symbol  # noqa: F401
 
 
 def unimport(genfunc):

src/trezor/workflow.py

@@ -1,6 +1,4 @@
-from trezor import log
 from trezor import loop
-from trezor import ui
 
 started = []
 default = None

tests/common.py

@@ -2,6 +2,6 @@ import sys
 
 sys.path.append('../src')
 
-from ubinascii import hexlify, unhexlify
+from ubinascii import hexlify, unhexlify  # noqa: F401
 
-import unittest
+import unittest  # noqa: F401

tests/examples/2048/main.py

@@ -9,7 +9,7 @@ from trezor import ui
 from trezor import loop
 from trezor import workflow
 from trezor.crypto import random
-from trezor.ui.swipe import Swipe, SWIPE_DOWN, SWIPE_UP, SWIPE_LEFT, SWIPE_RIGHT
+from trezor.ui.swipe import Swipe, SWIPE_DOWN, SWIPE_UP, SWIPE_LEFT
 
 color_bg = ui.rgb(0xbb, 0xad, 0xa0)
 color_empty = ui.rgb(0xcc, 0xc0, 0xb3)

tests/test_apps.wallet.segwit.signtx.native_p2wpkh.py

@@ -8,7 +8,7 @@ from trezor.messages.TxOutputType import TxOutputType
 from trezor.messages.TxRequest import TxRequest
 from trezor.messages.TxAck import TxAck
 from trezor.messages.TransactionType import TransactionType
-from trezor.messages.RequestType import TXINPUT, TXOUTPUT, TXMETA, TXFINISHED
+from trezor.messages.RequestType import TXINPUT, TXOUTPUT, TXFINISHED
 from trezor.messages.TxRequestDetailsType import TxRequestDetailsType
 from trezor.messages.TxRequestSerializedType import TxRequestSerializedType
 from trezor.messages import InputScriptType

tests/test_apps.wallet.segwit.signtx.p2wpkh_in_p2sh.py

@@ -8,7 +8,7 @@ from trezor.messages.TxOutputType import TxOutputType
 from trezor.messages.TxRequest import TxRequest
 from trezor.messages.TxAck import TxAck
 from trezor.messages.TransactionType import TransactionType
-from trezor.messages.RequestType import TXINPUT, TXOUTPUT, TXMETA, TXFINISHED
+from trezor.messages.RequestType import TXINPUT, TXOUTPUT, TXFINISHED
 from trezor.messages.TxRequestDetailsType import TxRequestDetailsType
 from trezor.messages.TxRequestSerializedType import TxRequestSerializedType
 from trezor.messages import InputScriptType

tests/test_apps.wallet.signtx.fee_threshold.py

@@ -9,7 +9,7 @@ from trezor.messages.TxOutputBinType import TxOutputBinType
 from trezor.messages.TxRequest import TxRequest
 from trezor.messages.TxAck import TxAck
 from trezor.messages.TransactionType import TransactionType
-from trezor.messages.RequestType import TXINPUT, TXOUTPUT, TXMETA, TXFINISHED
+from trezor.messages.RequestType import TXINPUT, TXOUTPUT, TXMETA
 from trezor.messages.TxRequestDetailsType import TxRequestDetailsType
 from trezor.messages import OutputScriptType
 

tests/test_trezor.ui.display.py

@@ -1,7 +1,5 @@
 from common import *
 
-from trezor.crypto import random
-
 from trezor.ui import display
 
 

tests/test_trezor.wire.codec_v1.py

@@ -3,12 +3,10 @@ import sys
 sys.path.append('../src')
 
 from utest import *
-from ustruct import pack, unpack
-from ubinascii import hexlify, unhexlify
+from ubinascii import unhexlify
 
 from trezor import io
-from trezor.loop import select, Syscall
-from trezor.crypto import random
+from trezor.loop import select
 from trezor.utils import chunks
 from trezor.wire import codec_v1
 

tests/test_trezor.wire.codec_v2.py

@@ -3,11 +3,10 @@ import sys
 sys.path.append('../src')
 
 from utest import *
-from ustruct import pack, unpack
-from ubinascii import hexlify, unhexlify
+from ustruct import pack
 
 from trezor import io
-from trezor.loop import select, Syscall
+from trezor.loop import select
 from trezor.utils import chunks
 from trezor.wire import codec_v2