File mainwindow.py has 458 lines of code (exceeds 250 allowed). Consider refactoring.

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import datetime
import logging
import zlib

from PySide.QtCore import (

Settings has 24 functions (exceeds 20 allowed). Consider refactoring.

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class Settings(QObject):
    """Allows other modules to access application settings.

    Todo:
        Possibly change to requesting settings by string instead of defining

Function toggle_window has a Cognitive Complexity of 19 (exceeds 5 allowed). Consider refactoring.

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    def toggle_window(self):
        """Show and hide main window.

        If visible, then hide the window. If not visible, then open window
        based on position settings at: mouse cursor, system tray, or last

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Function __init__ has 55 lines of code (exceeds 25 allowed). Consider refactoring.

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    def __init__(self, parent=None):
        super(SettingsDialog, self).__init__(parent)

        self.settings = Settings()

Function unregister has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.

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    def unregister(self, sequence=None, callback=None, winid=None):
        if sequence is not None:
            assert callback is not None, 'Invalid parameter'
            if isinstance(sequence, str):
                sequence = QKeySequence(sequence)

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Function __init__ has 34 lines of code (exceeds 25 allowed). Consider refactoring.

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    def __init__(self, parent=None):
        super(HistoryListView, self).__init__(parent)

        self.parent = parent

Function __init__ has 31 lines of code (exceeds 25 allowed). Consider refactoring.

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    def __init__(self, parent=None):
        super(MainWidget, self).__init__(parent)

        self.parent = parent

Function __init__ has 26 lines of code (exceeds 25 allowed). Consider refactoring.

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    def __init__(self, parent=None):
        super(SystemTrayIcon, self).__init__(parent)

        self.parent = parent

Function keyPressEvent has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.

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    def keyPressEvent(self, event):
        """Capture key and modifier presses and insert then.

        References:
        http://stackoverflow.com/questions/6647970/how-can-i-capture-qkey_sequence-from-qkeyevent-depending-on-current-keyboard-layo

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Function new_item has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.

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    def new_item(self, mime_data):
        """Append clipboard contents to database.

        :param mime_data: Clipboard contents mime data
        :type mime_data: QMimeData

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Function __init__ has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.

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    def __init__(self, mime_data, parent=None):
        """Preview display is determined by mime format.

        :param mime_data:
        :type mime_data: QMimeData

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Function __init__ has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.

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    def __init__(self):
        self.last_error = False
        self.pid_path = os.path.normpath(
            os.path.join(
                tempfile.gettempdir(),

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Function get_win32_owner has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.

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def get_win32_owner():
    """Get clipboard owner window details.

    Sources:
    https://sjohannes.wordpress.com/2012/03/23/win32-python-getting-all-window-titles/

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Avoid too many return statements within this function.

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            return None

Avoid too many return statements within this function.

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        return None

Avoid too many return statements within this function.

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        return True

Function keyPressEvent has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.

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    def keyPressEvent(self, event):
        """Allow arrow selection on history list from search box.

        Override QLineEdit.keyPressEvent and check for up and down arrow key
        for changing selection. If conditional checks not met, return original

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