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PyCharm as the Ultimate Python Debugger. Many people use the standard Python debugger (pdb) because it works well and can be used as a standalone tool or with your favorite editor.

PyCharm as the Ultimate Python Debugger

I’ve used it for years, but today I’m more productive using the PyCharm debugger. It can debug Python, JavaScript, and Django and Jinja Templates (making the debugging process seamless in web applications). Also, I don’t have to worry about leaving pdb.set_trace()calls around anymore Since the process to run and debug code in PyCharm is similar, we will look how to run code first (jump to the debugging section if you already know how to run code in PyCharm). Running Python Code If we haven’t run any code in our project before, the icons to run and debug will be disabled: Some items will be disabled in the menu as well: To run a script for the first time, we need to either create a configuration () or ask PyCharm to run the current file by going to , where PyCharm will automatically offer to run the current file.

27.3. pdb — The Python Debugger — Python 3.5.1 documentation. Source code: Lib/pdb.py The module pdb defines an interactive source code debugger for Python programs.

27.3. pdb — The Python Debugger — Python 3.5.1 documentation

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. It also supports post-mortem debugging and can be called under program control. Pdb – Interactive Debugger. Pdb implements an interactive debugging environment for Python programs.

pdb – Interactive Debugger

It includes features to let you pause your program, look at the values of variables, and watch program execution step-by-step, so you can understand what your program actually does and find bugs in the logic. Starting the Debugger The first step to using pdb is causing the interpreter to enter the debugger when you want it to. There are a few different ways to do that, depending on your starting conditions and what you need to debug. From the Command Line The most straightforward way to use the debugger is to run it from the command line, giving it your own program as input so it knows what to run. Running the debugger from the command line causes it to load your source file and stop execution on the first statement it finds.

. $ python -m pdb pdb_script.py > ... Note Normally pdb includes the full path to each module in the output when printing a filename. Within the Interpreter From Within Your Program. Ipdb 0.9.0. Use ipdb exports functions to access the IPython debugger, which features tab completion, syntax highlighting, better tracebacks, better introspection with the same interface as the pdb module.

ipdb 0.9.0

Example usage: import ipdb ipdb.set_trace() ipdb.set_trace(context=5) # will show five lines of code # instead of the default three lines ipdb.pm() ipdb.run('x[0] = 3') result = ipdb.runcall(function, arg0, arg1, kwarg='foo') result = ipdb.runeval('f(1,2) - 3') The post-mortem function, ipdb.pm(), is equivalent to the magic function %debug. If you install ipdb with a tool which supports setuptools entry points, an ipdb script is made for you. . $ bin/ipdb mymodule.py And for python 3 $ bin/ipdb3 mymodule.py Alternatively with Python 2.7 only, you can also use $ python -m ipdb mymodule.py You can also enclose code with the with statement to launch ipdb if an exception is raised: from ipdb import launch_ipdb_on_exception with launch_ipdb_on_exception(): [...] Warning. Winpdb - A Platform Independent Python Debugger » About. Winpdb is a platform independent GPL Python debugger with support for multiple threads, namespace modification, embedded debugging, encrypted communication and is up to 20 times faster than pdb.

Winpdb - A Platform Independent Python Debugger » About

Winpdb is being developed by Nir Aides since 2005. Their Educated Opinion Ryan Paul of Ars Technica - When I require a Python debugger, for instance, I’m perfectly satisfied with using an external tool like Winpdb.Ondrej Certik, founder of SymPy - I debug … using a wonderful tool winpdb.Elliot Murphy, engineer at Canonical - One other option for a GUI python debugger is the free (and Free), cross platform, totally awesome Winpdb.Prof. Norm Matlof of UC Davis - The Winpdb package, by Nir Aides, is an excellent Python debugger. Some Technical Details: GPL license. And a Screenshot. Debugging Python Like a Boss. 26.2. pdb — The Python Debugger. Source code: Lib/pdb.py The module pdb defines an interactive source code debugger for Python programs.

26.2. pdb — The Python Debugger

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. It also supports post-mortem debugging and can be called under program control.