When comparing Bluefish vs IDLE, the Slant community recommends IDLE for most people. In the question“What are the best Python IDEs or editors?” IDLE is ranked 35th while Bluefish is ranked 40th. The most important reason people chose IDLE is:
For short scripts, a heavyweight IDE just gets in the way. It's also easier for beginners to understand.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very powerful search and replace
Bluefish supports Perl Compatible regular expressions, sub-pattern replacing, and search and replace in files on disk
Pro Light and fast
Bluefish starts really quick (even on a netbook) and loads hundreds of files within seconds.
Pro Highlighting
Bluefish highlights matching blocks for start and end markers (for both brackets and tags).
Pro Emmet support
Support Emmet or Zen Coding.
Pro Auto-completion and auto-tag-closing
Bluefish supports auto-completion and auto-tag-closing for many programming languages, with reference information, and even for nested languages (e.g. css and javascript inside html code that is inside a php document), with included language definition files for: C/C++, CSS, HTML, XHTML, HTML5, Java, JSP, JavaScript, jQuery, Lua, Octave/MATLAB, MediaWiki, Pascal, Perl, PHP, Python, Ruby, XML, and others.
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 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.