diff --git a/plugins/trezor/client.py b/plugins/trezor/client.py
index 0746513d9..6b355161d 100644
--- a/plugins/trezor/client.py
+++ b/plugins/trezor/client.py
@@ -2,6 +2,7 @@ from sys import stderr
 
 from electrum.i18n import _
 
+
 class GuiMixin(object):
     # Requires: self.proto, self.device
 
@@ -47,12 +48,13 @@ class GuiMixin(object):
         return self.proto.PassphraseAck(passphrase=passphrase)
 
     def callback_WordRequest(self, msg):
-        #TODO
+        # TODO
         stderr.write("Enter one word of mnemonic:\n")
         stderr.flush()
         word = raw_input()
         return self.proto.WordAck(word=word)
 
+
 def trezor_client_class(protocol_mixin, base_client, proto):
     '''Returns a class dynamically.'''
 
diff --git a/plugins/trezor/plugin.py b/plugins/trezor/plugin.py
index 89255eda0..f860b0e71 100644
--- a/plugins/trezor/plugin.py
+++ b/plugins/trezor/plugin.py
@@ -6,6 +6,7 @@ from electrum.i18n import _
 from electrum.plugins import BasePlugin, hook
 from electrum.transaction import deserialize, is_extended_pubkey
 
+
 class TrezorCompatiblePlugin(BasePlugin):
     # Derived classes provide:
     #
@@ -123,7 +124,7 @@ class TrezorCompatiblePlugin(BasePlugin):
             txinputtype = self.types.TxInputType()
             if txin.get('is_coinbase'):
                 prev_hash = "\0"*32
-                prev_index = 0xffffffff # signed int -1
+                prev_index = 0xffffffff  # signed int -1
             else:
                 if for_sig:
                     x_pubkeys = txin['x_pubkeys']
@@ -149,7 +150,7 @@ class TrezorCompatiblePlugin(BasePlugin):
                         )
                         txinputtype = self.types.TxInputType(
                             script_type=self.types.SPENDMULTISIG,
-                            multisig= multisig
+                            multisig=multisig
                         )
                         # find which key is mine
                         for x_pubkey in x_pubkeys:
diff --git a/plugins/trezor/qt.py b/plugins/trezor/qt.py
index 3e13c7662..a143cba2e 100644
--- a/plugins/trezor/qt.py
+++ b/plugins/trezor/qt.py
@@ -1,6 +1,7 @@
 from plugins.trezor.qt_generic import QtPlugin
 from trezorlib.qt.pinmatrix import PinMatrixWidget
 
+
 class Plugin(QtPlugin):
     pin_matrix_widget_class = PinMatrixWidget
     icon_file = ":icons/trezor.png"
diff --git a/plugins/trezor/qt_generic.py b/plugins/trezor/qt_generic.py
index 0f049eaa8..ba47835d5 100644
--- a/plugins/trezor/qt_generic.py
+++ b/plugins/trezor/qt_generic.py
@@ -13,6 +13,7 @@ from electrum_gui.qt.util import *
 from electrum.i18n import _
 from electrum.plugins import hook
 
+
 class QtHandler:
     '''An interface between the GUI (here, QT) and the device handling
     logic for handling I/O.  This is a generic implementation of the
@@ -129,7 +130,7 @@ class QtPlugin(TrezorPlugin):
         if storage.get('wallet_type') != self.wallet_class.wallet_type:
             return
         seed = wizard.enter_seed_dialog(_("Enter your %s seed") % self.device,
-                                        None, func=lambda x:True)
+                                        None, func=lambda x: True)
         if not seed:
             return
         wallet = self.wallet_class(storage)
@@ -150,8 +151,8 @@ class QtPlugin(TrezorPlugin):
 
     @hook
     def receive_menu(self, menu, addrs):
-        if (not self.wallet.is_watching_only() and self.atleast_version(1, 3)
-            and len(addrs) == 1):
+        if (not self.wallet.is_watching_only() and
+                self.atleast_version(1, 3) and len(addrs) == 1):
             menu.addAction(_("Show on %s") % self.device,
                            lambda: self.show_address(addrs[0]))
 
@@ -175,8 +176,11 @@ class QtPlugin(TrezorPlugin):
         except BaseException as e:
             window.show_error(str(e))
             return
-        get_label = lambda: self.get_client().features.label
-        update_label = lambda: current_label.setText("Label: %s" % get_label())
+
+        def update_label():
+            label = self.get_client().features.label
+            current_label.setText("Label: %s" % label)
+
         d = WindowModalDialog(window, _("%s Settings") % self.device)
         layout = QGridLayout(d)
         layout.addWidget(QLabel(_("%s Options") % self.device), 0, 0)
@@ -200,6 +204,6 @@ class QtPlugin(TrezorPlugin):
         update_label()
         change_label_button = QPushButton("Modify")
         change_label_button.clicked.connect(modify_label)
-        layout.addWidget(current_label,3,0)
-        layout.addWidget(change_label_button,3,1)
+        layout.addWidget(current_label, 3, 0)
+        layout.addWidget(change_label_button, 3, 1)
         d.exec_()