Add example pyside2 app as starting point

.gitignore

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+.DS_Store

app/.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# celery beat schedule file
+celerybeat-schedule
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/

app/Pipfile

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+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+pyside2 = "*"
+
+[requires]
+python_version = "3.7"

app/app.py

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+import sys
+import random
+from PySide2 import QtCore, QtWidgets, QtGui
+
+class MyWidget(QtWidgets.QWidget):
+    def __init__(self):
+        super().__init__()
+
+        self.hello = ["Hallo Welt", "Hei maailma", "Hola Mundo", "Привет мир"]
+
+        self.button = QtWidgets.QPushButton("Click me!")
+        self.text = QtWidgets.QLabel("Hello World")
+        self.text.setAlignment(QtCore.Qt.AlignCenter)
+
+        self.layout = QtWidgets.QVBoxLayout()
+        self.layout.addWidget(self.text)
+        self.layout.addWidget(self.button)
+        self.setLayout(self.layout)
+
+        self.button.clicked.connect(self.magic)
+
+
+    def magic(self):
+        self.text.setText(random.choice(self.hello))
+
+
+if __name__ == "__main__":
+    app = QtWidgets.QApplication([])
+
+    widget = MyWidget()
+    widget.resize(800, 600)
+    widget.show()
+
+    sys.exit(app.exec_())