What’s New in PyCharm 2021.2

Pattern Matching (PEPs 634, 635, 636)

Structural Pattern Matching is coming in Python 3.10. PyCharm provides a number of key features to help you adjust to its arrival, like the Unused local symbols and Unreachable code inspections, smart code completion and syntax highlighting for the match and case keywords, and the Complete Current Statement action.

Complete Current Statement

PyCharm can now complete match statements and their corresponding case blocks. Once you’re done typing an initial match statement, you can choose Complete Current Statement (Shift+Ctrl+Enter) and PyCharm will complete the remaining part, including the colon and the first part of the case block. The caret will be left in place for you to start typing the rest of the case block.

Formatter

PyCharm’s built-in formatter recognizes match statements and helps you format them correctly.

New syntax for union types (PEP 604)

In Python 3.10 you will be able to use int | str for union types instead of Union[int, str]. This functionality is already available in earlier versions of Python through the use of from __future__ import annotations.

PyCharm provides overall code insight for the new syntax, including intention actions and information in the Quick Documentation. PyCharm now supports type inference for isinstance and issubclass arguments with the new syntax type.

Working in the Python console is now supported on both the client machine and the host side. During a collaborative coding session, guests can review the code while the host runs it in the interactive console. Support for the Python console in Code With Me comes complete with all the usual PyCharm features, such as on-the-fly syntax highlighting with inspections and code completion.

When you are in Following mode during a Code With Me session, it is possible to keep track of which code completion suggestions the person you are following uses. Also, for any session type, guests’ completion results are exactly the same as they would have been for the host.

In PyCharm 2021.1 we implemented the Python Packages tool window to manage packages for the currently selected Python interpreter. Now you can install packages, not only from the PyPI repository, but also from VCS or a local machine. Click the Add Package link on the Python Packages toolbar and select From Version Control | From Disc.

Now PyCharm can complete fields, nested fields, and fields inside aggregation expressions, as well as query operators, projection operators, update operators, and aggregation stages in the MongoDB console.

Context live templates now work directly from the data editor. If you’re working with a table and you wish to query it, you can easily do so with the help of the SQL scripts action!

PyCharm lets you preview HTML files in a browser using the built-in web server. Now it is able to automatically update the pages in a browser as you edit and save your HTML, CSS, and JavaScript files. To get started, open an HTML file in the editor, hover over the corner of the editor, and click on the icon for the browser you want to use – all browsers are supported.

You will no longer need to waste time on refactoring useState values and functions one by one – PyCharm can now rename both for you! Place the caret on a state value and press Shift+F6 or go to Refactor | Rename from the right-click context menu.

Did you know that PyCharm can add missing import statements as you complete ES6 symbols? Now it can do the same for CommonJS modules – require imports will be inserted on code completion.

We’ve expanded the list of possible pre-commit actions with the ability to execute tests. Tick the Run Tests checkbox in the Before Commit section to test the applied changes. You can also customize the Analyze code and Cleanup options by clicking Choose profile next to them. The progress and results of all the pre-commit checks appear in the Commit area.

Space job statuses in the Git log

It is easy to track a job’s progress by just looking at the commits list, as we’ve introduced icons for Space job statuses in the Log tab of the Git tool window. If you click on an icon, the IDE will open a popup with the automation info for that job.

If you don’t need the status information, click the eye icon above the log and select Show Columns | Space Automation.

Branch display in code reviews

Your IDE can now show related branches in the selected code review. You can see the list of branches that contain the commits made while working on the current issue in the Details tab.

Mention teammates

Communicating with teammates in Space code reviews is now more convenient, as you can mention them with @ followed by the colleague’s name. This minor but helpful feature works in the timeline and in code comments.