init commit, echo kernel works

.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/
+*.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
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+
+# 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
+
+# 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
+*.ipynb

dot_kernel/__init__.py

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+# -*- coding: utf-8 -*-
+
+from ipykernel.kernelbase import Kernel
+
+
+class EchoKernel(Kernel):
+    implementation = "Echo"
+    implementation_version = "1.0"
+    language = "no-op"
+    language_version = "0.1"
+    language_info = {
+        "name": "Any text",
+        "mimetype": "text/plain",
+        "file_extension": ".txt",
+    }
+    banner = "Echo kernel - as useful as a parrot"
+
+    def do_execute(
+        self, code, silent, store_history=True, user_expressions=None, allow_stdin=False
+    ):
+        if not silent:
+            stream_content = {"name": "stdout", "text": code}
+            self.send_response(self.iopub_socket, "stream", stream_content)
+
+        return {
+            "status": "ok",
+            # The base class increments the execution count
+            "execution_count": self.execution_count,
+            "payload": [],
+            "user_expressions": {},
+        }

dot_kernel/__main__.py

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+from . import EchoKernel
+from ipykernel.kernelapp import IPKernelApp
+
+IPKernelApp.launch_instance(kernel_class=EchoKernel)

dot_kernel_spec/kernel.json

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+{
+    "argv": ["python", "-m", "dot_kernel", "-f", "{connection_file}"],
+    "display_name": "dot"
+}

setup.py

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+# -*- coding: utf-8 -*-
+
+from setuptools import setup
+
+setup(
+    name="dot_kernel",
+    version="1.0.0",
+    url="https://github.com/mypackage.git",
+    author="Author Name",
+    author_email="author@gmail.com",
+    description="Description of my package",
+    packages=["dot_kernel"],
+    install_requires=[],
+)