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re-add docker bottle post
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‎content/pages/01-introduction/07-companies.markdown‎

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throughout their organization to run chaos engineering tests and generally
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glue together the code from their high-functioning polyglot teams.
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* [Google uses Python extensively](https://stackoverflow.com/questions/2560310/heavy-usage-of-python-at-google)
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and officially supports it internally as one of their three core languages,
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the other two being Java and Golang. While Google likely has every
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programming language running somewhere in their infrastructure, Python
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receives priority support due to its core language status.
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* [Facebook and Instagram use Python 3](https://thenewstack.io/instagram-makes-smooth-move-python-3/)
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at scale. They've been very vocal about successfully making the migration
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from the [Python 2 world into Python 3](/python-2-or-3.html).

‎content/posts/180309-flask-docker-macos.markdown‎

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meta: Learn how to set up and develop a new Flask web application within a Docker container.
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category: post
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date: 2018-03-09
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modified: 2018-06-04
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modified: 2018-06-05
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newsletter: False
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headerimage: /img/180309-flask-docker/header.jpg
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headeralt: Flask, Docker and Apple logos, copyright their respective owners.
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Within the Docker container we will use:
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* Python 3, specifically the
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[slim-3.6.4 version](https://hub.docker.com/r/library/python/tags/3.6-slim/)
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[slim-3.6.5 version](https://hub.docker.com/r/library/python/tags/)
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from Docker Hub
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* [Flask](/flask.html) version 1.0.2
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If Docker is installed correctly you should see the following output:
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```
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Docker version 17.12.0-ce, build c97c6d6
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Docker version 18.03.1-ce, build 9ee9f40
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```
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Note that Docker runs through a system agent you can find in the menu bar.
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```
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# this is an official Python runtime, used as the parent image
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FROM python:3.6.4-slim
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FROM python:3.6.5-slim
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# set the working directory in the container to /app
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WORKDIR /app

‎content/posts/180509-pycon-us-2018.markdown‎

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title: Full Stack Python at PyCon US 2018
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slug: full-stack-python-pycon-us-2018
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meta: Come by and say hello to Matt Makai, author of Full Stack Python, at PyCon US 2018 in Cleveland, Ohio.
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category: post
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date: 2018-05-09
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modified: 2018-05-09
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newsletter: True
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headerimage: /img/visuals/email-post-header.jpg
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headeralt: Python programming language and Full Stack Python logos.
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[PyCon US 2018](https://us.pycon.org/2018/about/) kicked off today with the
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[first day of tutorials](https://us.pycon.org/2018/schedule/tutorials/). I am
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flying in tomorrow and will be there through the end of the
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weekend. If you're around, come by either the
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[Twilio booth](https://www.twilio.com/) or the community booth where the 
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gang from [Talk Python to Me](https://talkpython.fm/),
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[Real Python](https://realpython.com/), [PyBites](https://pybit.es/) and
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[Test & Code](http://testandcode.com/) will be hanging out. I will be
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at one of those two spots when I am not watching talks! I'd love your
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feedback on what I can improve on
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[Full Stack Python](https://www.fullstackpython.com/). It's also great
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hearing your stories about how the site has helped you improve your
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development skills.
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For those folks who can't make it to PyCon, I'll be tweeting the best stuff
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that I see throughout the conference via
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[@fullstackpython](https://twitter.com/fullstackpython). Likewise, if I miss
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something let me know on Twitter or via email so we can highlight it.
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One quick update on the
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[Full Stack Python Guide to Deployments book](https://www.deploypython.com/).
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I have a great update in the works that bumps to the latest versions of
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Ubuntu (now 18.04 LTS), Ansible 2.5.1 and Flask 1.0.2. It has been a long
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time coming and will be a free update to all existing purchasers. If you have
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not bought the book yet, I recommend waiting until the update is out
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because the existing book's software versions are getting way too out of
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date to be useful to most projects.
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Got questions or comments about 
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[Full Stack Python](https://www.fullstackpython.com/)? Send me an email or 
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[submit an issue ticket on GitHub](https://github.com/mattmakai/fullstackpython.com/issues) 
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to let me know how to improve the site as I continue to fill in the
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[table of contents](https://www.fullstackpython.com/table-of-contents.html) 
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with [new pages](https://www.fullstackpython.com/change-log.html) and 
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[new tutorials](https://www.fullstackpython.com/blog.html).

‎content/posts/180604-bottle-docker-macos.markdown‎

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title: First Steps with Bottle Apps in Docker Containers on macOS
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title: Running Bottle Apps in Docker Containers on macOS
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slug: first-steps-bottle-web-apps-docker-containers
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meta: Learn how to set up and develop a new Bottle web application within a Docker container.
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category: post
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date: 2018-06-04
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modified: 2018-06-04
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modified: 2018-06-05
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newsletter: False
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headerimage: /img/180604-bottle-docker/header.jpg
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headeralt: Bottle, Docker and Apple logos, copyright their respective owners.
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[download the Docker Community Edition (CE) for Mac](https://www.docker.com/community-edition#/download)
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installer.
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<img src="https://github.com/img/180309-flask-docker/docker-ce.jpg" width="100%"
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<img src="https://github.com/img/180604-bottle-docker/docker-ce.jpg" width="100%"
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class="shot rnd" alt="Download the Docker Community Edition for Mac.">
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Find the newly-downloaded install within Finder and double click on the file.
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Follow the installation process, which includes granting administrative privileges
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to the installer.
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Open Finder and go to the downloads folder where the installation file is located.
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Follow the installation steps and open Terminal when the installer finishes.
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Open Terminal when the installer is done. Test your Docker installation with the
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Test your Docker installation by running the `docker` command along with the
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`--version` flag:
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```
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If Docker is installed correctly you should see the following output:
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```
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Docker version 17.12.0-ce, build c97c6d6
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Docker version 18.03.1-ce, build 9ee9f40
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```
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Note that Docker runs through a system agent you can find in the menu bar.
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<img src="https://github.com/img/180309-flask-docker/docker-agent.png" width="100%"
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class="shot rnd" alt="Docker agent in the menu bar.">
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<img src="https://github.com/img/180604-bottle-docker/docker-agent.png" width="100%"
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class="shot rnd" alt="Docker agent in the menu bar.">
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I have found the Docker agent to take up some precious battery life
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on my Macbook Pro. If I am not developing and need to max battery time I will
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close down the agent and start it back up again when I am ready to code.
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Now that Docker is installed let's get to running a container and writing
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our Flask application.
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Docker is now installed so we can run a container and write a simple
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Bottle application to test running an app within the container.
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## Dockerfile
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Docker needs to know what we want in a container, which is where the
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`Dockerfile` comes in.
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Docker needs to know what we want in our container so we specify an
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image using a `Dockerfile`.
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```
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# this is an official Python runtime, used as the parent image
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FROM python:3.6.4-slim
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FROM python:3.6.5-slim
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# set the working directory in the container to /app
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WORKDIR /app
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# execute everyone's favorite pip command, pip install -r
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RUN pip install --trusted-host pypi.python.org -r requirements.txt
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# unblock port 80 for the Flask app to run on
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# unblock port 80 for the Bottle app to run on
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EXPOSE 80
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# execute the Flask app
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CMD ["python", "app.py"]
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```
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Save the Dockerfile so that we can run our next command with the completed
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contents of the file. On the commandline run:
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Save the Dockerfile and then on the commandline run:
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```
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docker build -t flaskdock .
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docker build -t bottledock .
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```
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The above `docker build` file uses the `-t` flag to tag the image with
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the name of `flaskdock`.
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the name of `bottledock`.
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If the build worked successfully the [shell](/shells.html) will show
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some completed output like the following:
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```
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$ docker build -t bottledock .
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Sending build context to Docker daemon 16.38kB
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Step 1/6 : FROM python:3.6.5-slim
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3.6.5-slim: Pulling from library/python
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f2aa67a397c4: Pull complete
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19cc085bc22b: Pull complete
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83bd7790bc68: Pull complete
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8b3329adba1b: Pull complete
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d0a8fd6eb5d0: Pull complete
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Digest: sha256:56100f5b5e299f4488f51ea81cc1a67b5ff13ee2f926280eaf8e527a881afa61
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Status: Downloaded newer image for python:3.6.5-slim
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---> 29ea9c0b39c6
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Step 2/6 : WORKDIR /app
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Removing intermediate container 627538eb0d39
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---> 26360255c163
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Step 3/6 : ADD . /app
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---> 9658b91b29db
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Step 4/6 : RUN pip install --trusted-host pypi.python.org -r requirements.txt
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---> Running in f0d0969f3066
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Collecting bottle==0.12.13 (from -r requirements.txt (line 1))
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Downloading https://files.pythonhosted.org/packages/bd/99/04dc59ced52a8261ee0f965a8968717a255ea84a36013e527944dbf3468c/bottle-0.12.13.tar.gz (70kB)
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Building wheels for collected packages: bottle
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Running setup.py bdist_wheel for bottle: started
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Running setup.py bdist_wheel for bottle: finished with status 'done'
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Stored in directory: /root/.cache/pip/wheels/76/a0/b4/2a3ee1a32d0506931e558530258de1cc04b628eff1b2f008e0
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Successfully built bottle
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Installing collected packages: bottle
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Successfully installed bottle-0.12.13
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Removing intermediate container f0d0969f3066
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---> 0534575c8067
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Step 5/6 : EXPOSE 80
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---> Running in 14e49938d3be
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Removing intermediate container 14e49938d3be
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---> 05e087d2471d
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Step 6/6 : CMD ["python", "app.py"]
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---> Running in ca9738bfd06a
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Removing intermediate container ca9738bfd06a
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---> 9afb4f01e0d3
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Successfully built 9afb4f01e0d3
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Successfully tagged bottledock:latest
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```
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If the build worked successfully we can see the image in with the
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`docker image ls` command. Give that a try now:
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We can also see the image with the `docker image ls` command. Give that
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a try now:
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```
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docker image ls
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```
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We should then see our tag name in the images list:
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Our tag name should appear in the images list:
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```
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REPOSITORY TAG IMAGE ID CREATED SIZE
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flaskdock latest 24045e0464af 2 minutes ago 165MB
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bottledock latest 9afb4f01e0d3 About a minute ago 145MB
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```
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Our image is ready to load up as a container so we can write a quick
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Flask app that we will use to test our environment by running it within
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the container.
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Our image is ready to load as a container so we can code a short
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Bottle web app for testing and then further development.
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## Coding A Simple Flask app
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Time to put together a super simple "Hello, World!" Flask web app to test
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## Coding A Bottle Web App
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It is time to code a simple "Hello, World!"-style Bottle app to test
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running Python code within our Docker container. Within the current
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project directory, create a file named `app.py` with the following contents:
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```python
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from flask import Flask, Response
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import bottle
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from bottle import route, run
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app = Flask(__name__)
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app = bottle.default_app()
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@app.route("/")
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def hello():
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return Response("Hi from your Flask app running in your Docker container!")
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@route('/')
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def hello_world():
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return "Hello, world! (From Full Stack Python)"
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if __name__ == "__main__":
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app.run("0.0.0.0", port=80, debug=True)
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run(host="0.0.0.0", port=8080, debug=True, reloader=True)
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```
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The above 7 lines of code (not counting blank PEP8-compliant lines) in
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[app.py](https://github.com/fullstackpython/blog-code-examples/blob/master/docker-flask-mac/app.py)
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allow our application to return a simple message when run with the
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Flask development server.
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The above code returns a simple "Hello, world!" message when
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executed by the Bottle development server and contacted by a client.
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We need just one more file to specify our `Flask` dependency. Create
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We need just one more file to specify our `bottle` dependency. Create
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a `requirements.txt` file within the same directory as `app.py`:
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```
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flask==1.0.2
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bottle==0.12.13
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```
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Make sure both the `app.py` and `requirements.txt` file are saved then
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volume to your own directory.
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```
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docker run -p 5000:80 --volume=/Users/matt/devel/py/flaskdocker:/app flaskdock
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docker run -p 5000:8080 --volume=/Users/matt/devel/py/blog-code-examples/docker-bottle-macapp bottledock
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```
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If you receive the error
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`python: can't open file 'app.py': [Errno 2] No such file or directory` then
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you likely forgot to chance `/Users/matt/devel/py/flaskdocker` to the
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you likely did not change `/Users/matt/devel/py/bottledocker` to the
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directory where your project files, especially `app.py`, are located.
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<img src="https://github.com/img/180309-flask-docker/flask-app-response.png" width="100%"
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class="shot rnd" alt="Flask app responding to requests from within a Docker container.">
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<img src="https://github.com/img/180604-bottle-docker/bottle-app-response.png" width="100%"
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class="shot rnd" alt="Bottle web app responding to requests from within a Docker container.">
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Everything worked when you see a simple text-based HTTP response like what
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is shown above in the screenshot of my Chrome browser.
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## What's Next?
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We just installed Docker and configured a Flask application to run inside a
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We just installed Docker and wrote a Bottle web app to run inside a
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container. That is just the beginning of how you can integrate Docker into
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your workflow. I strongly recommend reading the
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[Django with PostgreSQL quickstart](https://docs.docker.com/compose/django/)
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that will introduce you to Docker Swarm as well as the core Docker container
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service.
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your workflow.
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Next up take a look at the [Docker](/docker.html) and
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[deployment](/deployment.html) pages for more related tutorials.
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Next up take a look at the [Bottle](/bottle.html), [Docker](/docker.html)
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and [deployment](/deployment.html) pages for more tutorials.
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Questions? Let me know via a GitHub
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[issue ticket on the Full Stack Python repository](https://github.com/mattmakai/fullstackpython.com/issues),
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Do you see a typo, syntax issue or just something that's confusing in this
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blog post? Fork
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[this page's source on GitHub](https://github.com/mattmakai/fullstackpython.com/blob/master/content/posts/180309-flask-docker-macos.markdown)
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[this page's source on GitHub](https://github.com/mattmakai/fullstackpython.com/blob/master/content/posts/180604-bottle-docker-macos.markdown)
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and submit a pull request with a fix or
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[file an issue ticket on GitHub](https://github.com/mattmakai/fullstackpython.com/issues).

‎static/img/180604-bottle-docker/bottle-app-response.png‎

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‎static/img/180604-bottle-docker/flask-app-response.png‎

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