It can be confusing to figure out how to use Dockercontainers in your Python andBottledevelopment environment workflow.This tutorial will quickly show you the exact steps to get Dockerup and running on macOS with a working Bottleweb application

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Use 'python -m pip' instead of running 'pip' or 'pip3' - that way the pip and python versions always match, whichever you currently have selected as 'python'. I'd recommend you look at Conda as well - it's especially handy for people who aren't familiar with system administration.

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This tutorial is written for Python 3. It may work withPython 2 but it has not been testing with that soon-to-be deprecated2.7 version. You should really be using Python 3,preferrably the latest release which is currently3.6.5.

Docker for Mac is necessaryto run Docker containers. I recommend that you use the stable release unlessyou have an explicit purpose for theedge channel.

Within the Docker container we will use:

• Python 3, specifically theslim-3.6.5 versionfrom Docker Hub
• Bottle version 0.12.13

All for the Dockerfile and the Bottle project are available open sourceunder the MIT license on GitHub under thedocker-bottle-mac directoryof theblog-code-examplesrepository.

Installing Docker on macOS

We must install Docker before we can spin up our containers. Jump tothe next section if you already have Docker for Mac installed and workingon your computer.

On your Mac,download the Docker Community Edition (CE) for Macinstaller.

Open Finder and go to the downloads folder where the installation file is located.Follow the installation steps and open Terminal when the installer finishes.

Test your Docker installation by running the docker command along with the--version flag:

If Docker is installed correctly you should see the following output:

Note that Docker runs through a system agent you can find in the menu bar. Best mac yosemite apps.

Docker is now installed so we can run a container and write a simpleBottle application to test running an app within the container.

Dockerfile

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Docker needs to know what we want in our container so we specify animage using a Dockerfile.

Save the Dockerfile and then on the commandline run:

The above docker build file uses the -t flag to tag the image withthe name of bottledock.

If the build worked successfully the shell will showsome completed output like the following:

A message will pop up from your menu bar, giving you the option to recall your email or to send it immediately. Click on the Undo Send button to recall or edit your email. Click on the Send button to send the email without further delay. There's no feature to recall sent email messages in any version of Outlook for Mac. If this is a feature you'd like to see in future versions, please provide feedback at Microsoft's UserVoice site. Stay a step ahead with Microsoft 365. https://globelucky.netlify.app/how-to-recall-an-email-in-mac-mail-app.html. In the Mail app on your Mac, select messages or conversations in the list. All of the messages in a conversation will be deleted. Click the Delete button in the Mail toolbar or press the Delete key. If you delete a mailbox, all of the messages in the mailbox are deleted. You can search for. It allows Apple Mail users to set a delay period for their emails and recall them before reaching the recipient. How to recall emails in Apple Mail. Find out how to unsend an email with Apple Mail on Mac in a few easy steps by following the instructions below. Download and install Mailbutler for Apple Mail. To recall and replace a message In the folder pane on the left of the Outlook window, choose the Sent Items folder. Open the message that you want to recall. You must double-click to open the message.

We can also see the image with the docker image ls command. Give thata try now:

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Our tag name should appear in the images list:

Our image is ready to load as a container so we can code a shortBottle web app for testing and then further development.

Coding A Bottle Web App

It is time to code a simple 'Hello, World!'-style Bottle app to testrunning Python code within our Docker container. Within the currentproject directory, create a file named app.py with the following contents:

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The above code returns a simple 'Hello, world!' message whenexecuted by the Bottle development server and contacted by a client.

A note about the reminder. If a time-based alert is set, it can repeat every day, week, two weeks, month, or year. How to see completed reminders on mac. A priority, from 'Low' to 'High'. Additionally, each reminder can optionally have the following:. An alarm at a certain date and time.

We need just one more file to specify our bottle dependency. Createa requirements.txt file within the same directory as app.py:

Make sure both the app.py and requirements.txt file are saved thenwe can give the code a try.

Running the Container

Now that we have our image in hand along with the Python code in a filewe can run the image as a container with the docker run command. Executethe following command, making sure to replace the absolute path for thevolume to your own directory.

If you receive the errorpython: can't open file 'app.py': [Errno 2] No such file or directory thenyou likely did not change /Users/matt/devel/py/bottledocker to thedirectory where your project files, especially app.py, are located.

Everything worked when you see a simple text-based HTTP response like whatis shown above in the screenshot of my Chrome browser.

What's Next?

We just installed Docker and wrote a Bottle web app to run inside acontainer. That is just the beginning of how you can integrate Docker intoyour workflow.

Next up take a look at the Bottle, Dockerand deployment pages for more tutorials.

Questions? Let me know via a GitHubissue ticket on the Full Stack Python repository,on Twitter@fullstackpythonor @mattmakai. Best free password keeper app.

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Do you see a typo, syntax issue or just something that's confusing in thisblog post? Forkthis page's source on GitHuband submit a pull request with a fix orfile an issue ticket on GitHub.