Komodo supports debugging (IDE ONLY) for all of its major dynamic languages which includes Python, PHP, Go, Perl, Tcl, Ruby, NodeJS and JavaScript.

Every feature you would expect in a debugger is present in the Komodo debugger:

 

• watch variables
• REPL integration
• global and local variables
• custom and standard breakpoints
• step-in/over/out capability

 

What we do have that other IDEs may not support is remote debugging. This allows you to start a process outside of Komodo and have it connect to a debugging session in Komodo. This allows you to debug websites, subprocesses in a larger program, spontaneous debugging sessions from a running program, etc.