Pdb Python Cheat Sheet

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Python Debugger Cheatsheet Getting started importpdb;pdb.settrace startpdbfromwithinascript python-mpdb startpdbfromthecommandline Basics h(elp) printavailablecommands h(elp)command printhelpaboutcommand q(quit) quitdebugger Examine p(rint)expr printthevalueofexpr ppexpr pretty-printthevalueofexpr w(here) printcurrentposition(includingstacktrace). Python 3.7 break poi nt Start debugger inside a Python script PYTHO NBR EAK ‐ POI NT=0 Env Var: Set to skip all breakp oints PYTHO NBR EAK ‐ POI NT= ipd b.s ‐ et trace Env Var: breakp oint which debugger to use Getting Started import pdb;pd ‐ b.s et tra ce Start pdb inside a python script python -m pdb.

IPython / Jupyter¶

  • Using IPython makes interactive work easy.
    • Better shell
    • Notebook interface
    • Embeddable kernel
    • Parallel python

IPython shell shortcuts¶

  • TAB expansion to complete python names and file paths
  • ~ and * directory / file expansion
  • many 'magic' methods:

Help¶

%pdoc%pdef%psource for docstring, function definition, source code only.

Run¶

To run a program directly from the IPython console: Download soapui for mac.

%run has special flags for timing the execution of your scripts (-t) or for running them under the control of either Python's pdb debugger (-d) or profiler (-p):

Other Commands¶

  • %reset is not a kernel restart
  • Restart with Ctrl+. in 'qtconsole'
  • import module ; reload(module) to reload a module from disk

Debugging¶

OS Commands¶

History¶

GUI integration¶

Start with ipython --gui=qt or at the IPython prompt:

Python

Python String Manipulation Cheat Sheet

Arguments can be wx, qt, gtk and tk.

Matplotlib / pylab graphics in an iPython shell¶

Start with: ipython --matplotlib ( or --matplotlib=qt etc..)

Sheet

Python Pdb Tutorial

Pdb Python Cheat Sheet

At the IPython prompt:

Cheat Sheets For Python

%pylab makes the following imports:

At the command prompt:

alternative: --matplotlib inlineor within IPython:

To embed plots, SVG or HTML in qtconsole, call display:

Pdb Python Cheat Sheet

IPython Notebook web-based interface¶

Ipdb Commands

  • Start with: ipython notebook and switch to browser
  • Keyboard shortcuts:
    • Enter to edit a cell
    • Shift + Enter to evaluate
    • Ctrl + m or Esc for the 'command mode'

In command mode:

Python Pdb Commands

Papermill is a tool for parameterizing and executing Jupyter Notebooks.