Debugging (Django) application in PyCharm PyVo/Rubyslava - November 2013

1. Debugging (Django) application
in PyCharm
Pavel Kočí
@pavelkoci
PyVo/Rubyslava - November 2013

2. How to get some debugging data?
Common sophisticated debugging tools:
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Perl:
warn...
PHP:
echo...
Python:
print...
logger...

3. How to get some debugging data?
Common sophisticated debugging tools:
●
●
●
Perl:
warn...
PHP:
echo...
Python:
print...
logger...

4. Use debugger!

5. When and why to use debugger?
When:
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large project
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3rd party library crash
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really poorly written code
Why:
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breakpoints
investigation of the variables
and objects
stepping through program

6. Breakpoints
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Standard breakpoint
Conditional breakpoint
Enable breakpoint after another breakpoint hit
What happens
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suspend application
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log message to console
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log evaluated expression

7. Investigation of the variables and objects
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Frames stack
Variables and object in selected frame context

8. Investigation of the variables and objects
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Evaluate expression in current frame context

9. More in PyCharm
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Exception breakpoint
Javascript debugging - Firefox or Chrome support
Template debugging - Django, Mako, Jinja2,
Web2Py, Chameleon

10. More about PyCharm
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Professional Edition - paid
Community Edition – free, open-source,
but without Django support, ...
VCS support
Databases and SQL support
VirtualEnv support
http://www.jetbrains.com/pycharm/

11. Thanks
...