PyQt, matplotlib, Seaborn, and Titanic

Python Graph Gallery

References: https://python-graph-gallery.com

Seaborn

Main References:
Seaborn
Zhihu
Tryolabs
Zhihu2

Colab Reference: https://colab.research.google.com/github/jakevdp/PythonDataScienceHandbook/blob/master/notebooks/04.14-Visualization-With-Seaborn.ipynb

Support References:
https://yanwei-liu.medium.com/python-資料視覺化筆記-二-使用seaborn繪圖-3adb03407a9

Installation( import )
import matplotlib.pyplot as plt
import seaborn as sns
sns.set()

sns.set( style="ticks" )
- style
  - darkgrid
  - whitegrid
  - dark
  - white
  - ticks

Let's Start!!

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Conclusion:

Single Var:
- displot
- kdeplot
- rugplot
Multi Var:
- jointplot
- pairplot
- kdeplot
Relation:
- relplot
- scatterplot
- lineplot
Linear Regression
- regplot
- resiplot
- lmplot
Matric
- heatplot
- clustermap
Discrete
- stripplot
- swarmplot
Range
- boxplot
- boxenplot
- violinplot
Statistic
- barplot
- pointplot
- countplot
catplot
- catplot

jointplot
sns.jointplot(x="x", y="y", data=train)
- kind
  - kde
pairplot
sns.pairplot( train )
relplot
sns.relplot( x="x", y="y", data=train )
- hue
  - z
- style
  - z
- kind
  - line
- sort
  - False
regplot
sns.regplot( x="x", y="y", data=train
- ci
  - None
- order
  - 2
- robust : remove crazy data
  - True
- kind
  - scatter
catplot
sns.catplot( x="x", y="y", data=train)
- jitter
  - False
- kind
  - swarm
  - box
  - violin
    - split=True
  - bar
  - count
  - point
- hue
  - z
histplot
sns.histplot( x="x", hue="z", multiple="stack")
- hue
  - z
- multiple
  - stack
kedplot
sns.kdeplot( x="x", hue="z", multiple="stack")
- hue
  - z
- multiple
  - stack
rugplot
sns.rugplot( x )
- height
  - 0.3

FacetGrid

g = sns.FacetGrid( train, row = 'survived', col = 'class')
g.map( sns.distplot, "age")
plt.show()

heatmap

Matlibplot:

imshow

import matplotlib.pyplot as plt
plt.imshow(Sxx)

size:
- plt.figure(figsize=(15, 5))
Invert_x/y axis
- plt.gca().invert_xaxis()
- plt.gca().invert_yaxis()

PyQt

It's just like a C# window program for Python( linux/mac ) ?!

References: https://medium.com/bucketing/weekday-1-當qt-學會py-9472af78ccce

Installation:

check python3 version & install PySide2
python3 -V
pip3 install PySide2
Download QtDesigner and Install it.

Introduction

Widget: Each component is called "Widget"
- Button
- Label
- ComboBox
GUI Rendering
- ui file:
  - QUILoader
    - Import during runtime
  - pyside2-uic
    - Compile to python code, and import it.
      pyside2-uic mainwindow.ui > ui_mainwindow.py
    ex.
    - QtCreator
    - QtDesigner
- Qt LIB
  - Coding ^^
Layout
- VBox / HBox
- Grid
- form

Slot
from PySide2 import QtCore

@QtCore.Slot()
def exit(self):
    self.close()

connect
sleep_btn.clicked.connect(self.exit)

Signal
from PySide2.QtCore import Signal
```
class MainWindow(QMainWindow):
    hello_signal = Signal(str)
```
```
@QtCore.Slot(str)
def say_hello(self, msg):
    print('Hello ' + msg)
```
- activate
```
self.hello_signal.connect(self.say_hello)
self.hello_signal.emit('Pyside2!')
```
- stop at https://medium.com/bucketing/pyside-6-基礎物件介紹-label-button-edit-e4efa9fb424d
- 2021/01/14
- Label, Button, Edit
- ComboBox, RadioButton, CheckButton, SpinBox
- ListWidget, TableWidget, TreeWidget
- DockWidget, ToolBox, StackWidget
- QColor, QcolorDialog, QPalette
- StyleSheet, QFont, QFontDialog
- QSystemTrayIcon, Frameless, Window, MouseEvent
- Qdialog, QMessageBox
- QMenu, QAction, ToolTip, StatusTip
- QTimer, QCalendar, QDateEdit
- QTimeEdit, QLCDNumber, AnalogClock
- Logging
Hello World!

#!venv/bin/python3

import sys

from PySide2 import QtWidgets

if '__main__' == __name__:
    app = QtWidgets.QApplication(sys.argv)
    w = QtWidgets.QMainWindow()
    w.show()

    ret = app.exec_()
    sys.exit(ret)

Advanced Hello World!

#!venv/bin/python3

from PySide2.QtWidgets import QLabel
from PySide2.QtWidgets import QMainWindow
from PySide2.QtWidgets import QPushButton


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        """Main window, holding all user interface including.

    Args:
      parent: parent class of main window
    Returns:
      None
    Raises:
      None
    """
    super(MainWindow, self).__init__(parent)
    self._width = 800
    self._height = 600
    self._title = QLabel('PySide2 is Great', self)
    self._exit_btn = QPushButton('Exit', self)

    self.setMinimumSize(self._width, self._height)

pyside2-uic ex.

import sys
from PySide2.QtWidgets import QApplication, QMainWindow
from PySide2.QtCore import QFile
from ui_mainwindow import Ui_MainWindow

class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

if __name__ == "__main__":
    app = QApplication(sys.argv)

    window = MainWindow()
    window.show()

    sys.exit(app.exec_())

QUI Loader

import sys
from PySide2.QtUiTools import QUiLoader
from PySide2.QtWidgets import QApplication
from PySide2.QtCore import QFile

if __name__ == "__main__":
    app = QApplication(sys.argv)

    ui_file_name = "mainwindow.ui"
    ui_file = QFile(ui_file_name)
    if not ui_file.open(QIODevice.ReadOnly):
        print("Cannot open {}: {}".format(ui_file_name, ui_file.errorString()))
        sys.exit(-1)
    loader = QUiLoader()
    window = loader.load(ui_file)
    ui_file.close()
    if not window:
        print(loader.errorString())
        sys.exit(-1)
    window.show()

    sys.exit(app.exec_())

VBox/HBox Layout

#!venv/bin/python3

from PySide2.QtWidgets import QWidget
from PySide2.QtWidgets import QMainWindow
from PySide2.QtWidgets import QPushButton
from PySide2.QtWidgets import QVBoxLayout, QHBoxLayout, QGridLayout, QFormLayout


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        """Main window, holding all user interface including.
        Args:
          parent: parent class of main window
        Returns:
          None
        Raises:
          None
        """
        super(MainWindow, self).__init__(parent)
        self._widget = QWidget()
        self._width = 400
        self._height = 300
        self.setFixedSize(self._width, self._height)

        g_layout = QGridLayout()
        v_layout = self.build_v_layout()
        h_layout = self.build_h_layout()

        g_layout.addItem(v_layout, 0, 0, 2, 1)
        g_layout.addItem(h_layout, 0, 1, 1, 1)

        self._widget.setLayout(g_layout)

        self.setCentralWidget(self._widget)

    @staticmethod
    def build_v_layout():
        hello_btn = QPushButton('Hello')
        work_btn = QPushButton('Working')
        play_btn = QPushButton('Playing')
        sleep_btn = QPushButton('Sleeping')

        v_layout = QVBoxLayout()
        v_layout.addWidget(hello_btn)
        v_layout.addWidget(work_btn)
        v_layout.addWidget(play_btn)
        v_layout.addWidget(sleep_btn)

        return v_layout

    @staticmethod
    def build_h_layout():
        hello_btn = QPushButton('Hello')
        work_btn = QPushButton('Working')
        play_btn = QPushButton('Playing')
        sleep_btn = QPushButton('Sleeping')

        h_layout = QHBoxLayout()
        h_layout.addWidget(hello_btn)
        h_layout.addWidget(work_btn)
        h_layout.addWidget(play_btn)
        h_layout.addWidget(sleep_btn)

        return h_layout

Questions?
- What's the difference between PyQt and Matplotlib?
  - Just like "C# window" and "Matlab" ?!
- What's the difference between Matplotlib and Seaborn ?
  - Seaborn is build on top of Matplotlib
  - Seaborn is much prettier

PyQt, matplotlib, Seaborn, and Titanic

Python Graph Gallery

Seaborn

Matlibplot:

PyQt

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