inspect complex variable in python debugger, like pudb

debugging in python
python debugging tools
python breakpoint

How could I inspect complex variable (list, dict, object) value with python debugger, I am new to python, I tried pudb, it looks like when the variable type is complex type, the debugger only show type of the variable, not the value.

Is it possible to inspect value with pudb? or is there any other python debugger can do this?

To see the contents of a complex data type in pudb:

  1. Use the right arrow to move the cursor to the Variables box on the right.

  2. Use the up and down arrows to move the cursor to the variable you're interested in.

  3. Use the backslash '\' to show/hide the contents of the data structure.

debugging, How could I inspect complex variable (list, dict, object) value with python debugger, I am new to python, I tried pudb, it looks like when the  Pound for pound, PuDB is one of the nicest debugging tools I've seen. Its simplicity and eye appeal is great for those who haven't used debugging tools before, and it has sufficient features to be usable by experienced programmers as well.

print statement for sequence type works fairly in pdb sub console like bellow

>>> import pdb
>>> l=[9,0]
>>> def j():l=[1,2,3]
... 
>>> pdb.run('j()')
> <string>(1)<module>()
(Pdb) continue
>>> pdb.run('j()')
> <string>(1)<module>()
(Pdb) print l
[1, 2, 3]

Some print obj.name statements will work here too for attribute access of object.

ipdb: How to inspect complex structures, The python debugger is very powerful and really facilitates troubleshooting code. ipdb builds on top of ipython and pdb to give users a more interactive experience. The output also suggests that the object might be a dictionary-like object with to the key spine00.bma and assigned it to a variable for further inspection. In other words, how can I inspect the local variables of a function which is nested in the call stack? Important clarification: I DON'T want to continue or step into run() to inspect its local variables. I want to inspect (from my current, paused perspective) the local variables in the run() stack frame currently nested in the call stack.

You can just get to a python/ipython shell by pressing "!" . Then you can play around with your variables (view them, change them, etc.)

Introduction to the PuDB Python Debugging Tool, Pound for pound, PuDB is one of the nicest debugging tools I've seen. before, and it has sufficient features to be usable by experienced programmers as well. For complex work, say threads code, I would suggest WinPDB (which, in spite of its name, Are you "sure" that your variable w has the value 88 on line 20? The PUDB Python debugger provides a colorful ncurses-based "text-GUI" debugger that can be called by the local Sage python interpreter to debug Python scripts that interface with built-in Sage functions and types. In this tutorial, we provide a small sample script that interfaces with Sage and detail howto debug with PUDB in this case.

To show the contents of all the variables on the variable list by default you can go to Preferences by pressing Ctrl+P, and under Variable Stringifier select str() or repr() for a Python interpreter-like display of variables.

Otherwise, you can toggle a selected variable in the variable list (which is accessible by Right arrow keyboard key) by pressing s or r for str() and repr() and t to get back to display its type. With a variable set to show its type you can expand its contents in an orderly tree fashion typing '\' (backslash).

If your variable is a global one or you don't see it for some reason you will have to explicitly state that you wish to watch it by hitting n and then type its name.

Debugging Python Applications with the PDB Module, Note: As mentioned above, PDB is a built in Python module, so there is no need as it is beginner friendly and involves no complex concepts or syntax at all. if we wish to change anything, inspect variables, or if we want to run the script until​  PuDB is a full-screen, console-based visual debugger for Python. Its goal is to provide all the niceties of modern GUI-based debuggers in a more lightweight and keyboard-friendly package. PuDB allows you to debug code right where you write and test it--in a terminal.

Debugging Python code with pdb, The Python Debugger (pdb) is a powerful tool that all Python This makes debugging complex or confusing code much simpler since This allows you to go line by line and inspect the state of the code at When you do this, it will be like you never stopped the execution of the program in the first place. I'm debugging a python script, and I want to watch a variable for a change (much like you can watch a memory adress in gdb). How do you watch a variable in pdb

PyCharm as the Ultimate Python Debugger, Many people use the standard Python debugger (pdb or ipdb) because it works well and can The variables pane is a great way to explore complex data. The Variables pane helps me to inspect attributes such as duration and elements . inspect.getcallargs (func[, *args][, **kwds]) ¶ Bind the args and kwds to the argument names of the Python function or method func, as if it was called with them. For bound methods, bind also the first argument (typically named self) to the associated instance.

pdb – Interactive Debugger, pdb implements an interactive debugging environment for Python programs. to using pdb is causing the interpreter to enter the debugger when you want it to. examine and change the values of variables, and control how the debugger You can avoid typing complex commands repeatedly by using alias to define a  The module pdb defines an interactive source code debugger for Python programs. It supports setting (conditional) breakpoints and single stepping at the source line level, inspection of stack frames, source code listing, and evaluation of arbitrary Python code in the context of any stack frame.

Comments
  • with normal pdb you should be able to p my_var.whatever