When comparing PyCharm Community Edition vs IDLE, the Slant community recommends PyCharm Community Edition for most people. In the question“What are the best Python IDEs or editors?” PyCharm Community Edition is ranked 3rd while IDLE is ranked 35th. The most important reason people chose PyCharm Community Edition is:
PyCharm has CVS, Git, Subversion and Mercurial integration.
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Pros
Pro Version control integration
PyCharm has CVS, Git, Subversion and Mercurial integration.
Pro Sophisticated autocompletion
PyCharm includes sophisticated heuristics for determining what each variable type is and providing autocompletion suggestions for them.
Pro Excellent refactoring support
There are many refactoring options including renaming and changing signature across entire projects. It also includes the an ability to preview changes before committing and exclude anything unwanted.
Pro Excellent debugger
PyCharm can leverage run-time information when running your application with the built-in debugger to figure out what types can possibly be passed to which functions, etc.
Pro Framework support
PyCharm supports cefpython and electron.js (with c bindings).
Pro Pro features Free for students
JetBrains offers a Student Pack, which gives you a student license and access to the pro features of selected products such as PyCharm, IntelliJ IDEA and Php Storm.
Pro Sometimes simple is best
For short scripts, a heavyweight IDE just gets in the way. It's also easier for beginners to understand.
Pro Written in pure Python/tkinter
You can dig in and change how it works.
Pro Included in standard Python distributions
You probably already have it.
Pro Debugger
It has one.
Cons
Con Memory-hungry
Can use a lot of memory (several GBs), especially when dealing with large projects.
Con Can sometimes become very slow, freeze, and become unresponsive
It becomes extremely frustrating when you have to wait for the text you've typed to appear in your editor. Furthermore, during these freezes the editor does not always queue what your're typing, so you might have to wait > 15 seconds before you can continue your editing. This quickly affects the concentration of a developer, causing flow interruption and general performance degradation.
Con Feature incomplete
Some features are locked behind a paywall. Although if you are a student, you can apply for the Student Pack.
Con No Tabbing for Files or Shell instances
Idle's Interactive Python Shell and the Python Text Editor are separate window applications. Many would expect them to be unified together within a single window. To create a python program file, or module, the user first opens Idle (It's Interactive Shell), then the user goes to [File] and [New File] to open the Idle Text Editor. Plus, every time a new python file is opened, a new instance of Idle runs separately. So, there are no tabbed modules. That's clumsy approach that adds the complexity of juggling around many Idle instances.