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Title: Debugging and profiling — Python 3.15.0a5 documentation

Open Graph Title: Debugging and profiling

Description: These libraries help you with Python development: the debugger enables you to step through code, analyze stack frames and set breakpoints etc., and the profilers run code and give you a detailed br...

Open Graph Description: These libraries help you with Python development: the debugger enables you to step through code, analyze stack frames and set breakpoints etc., and the profilers run code and give you a detailed br...

Opengraph URL: https://docs.python.org/3/library/debug.html

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Domain: docs.python.org

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og:image:alt	These libraries help you with Python development: the debugger enables you to step through code, analyze stack frames and set breakpoints etc., and the profilers run code and give you a detailed br...
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Links:

	https://www.python.org/
test — Regression tests package for Python	https://docs.python.org/dev/library/test.html
Audit events table	https://docs.python.org/dev/library/audit_events.html
Report a bug	https://docs.python.org/dev/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/library/debug.rst?plain=1
index	https://docs.python.org/dev/genindex.html
modules	https://docs.python.org/dev/py-modindex.html
next	https://docs.python.org/dev/library/audit_events.html
previous	https://docs.python.org/dev/library/test.html
Python	https://www.python.org/
3.15.0a5 Documentation	https://docs.python.org/dev/index.html
The Python Standard Library	https://docs.python.org/dev/library/index.html
Debugging and profiling	https://docs.python.org/dev/library/debug.html
¶	https://docs.python.org/dev/library/debug.html#debugging-and-profiling
Audit events table	https://docs.python.org/dev/library/audit_events.html
bdb — Debugger framework	https://docs.python.org/dev/library/bdb.html
faulthandler — Dump the Python traceback	https://docs.python.org/dev/library/faulthandler.html
Dumping the traceback	https://docs.python.org/dev/library/faulthandler.html#dumping-the-traceback
Dumping the C stack	https://docs.python.org/dev/library/faulthandler.html#dumping-the-c-stack
C Stack Compatibility	https://docs.python.org/dev/library/faulthandler.html#c-stack-compatibility
Fault handler state	https://docs.python.org/dev/library/faulthandler.html#fault-handler-state
Dumping the tracebacks after a timeout	https://docs.python.org/dev/library/faulthandler.html#dumping-the-tracebacks-after-a-timeout
Dumping the traceback on a user signal	https://docs.python.org/dev/library/faulthandler.html#dumping-the-traceback-on-a-user-signal
Issue with file descriptors	https://docs.python.org/dev/library/faulthandler.html#issue-with-file-descriptors
Example	https://docs.python.org/dev/library/faulthandler.html#example
pdb — The Python Debugger	https://docs.python.org/dev/library/pdb.html
Command-line interface	https://docs.python.org/dev/library/pdb.html#command-line-interface
Debugger commands	https://docs.python.org/dev/library/pdb.html#debugger-commands
profiling — Python profilers	https://docs.python.org/dev/library/profiling.html
Introduction to profiling	https://docs.python.org/dev/library/profiling.html#introduction-to-profiling
Choosing a profiler	https://docs.python.org/dev/library/profiling.html#choosing-a-profiler
When to use statistical sampling	https://docs.python.org/dev/library/profiling.html#when-to-use-statistical-sampling
When to use deterministic tracing	https://docs.python.org/dev/library/profiling.html#when-to-use-deterministic-tracing
Quick start	https://docs.python.org/dev/library/profiling.html#quick-start
Statistical profiling	https://docs.python.org/dev/library/profiling.html#statistical-profiling
Deterministic profiling	https://docs.python.org/dev/library/profiling.html#deterministic-profiling
Understanding profile output	https://docs.python.org/dev/library/profiling.html#understanding-profile-output
Legacy compatibility	https://docs.python.org/dev/library/profiling.html#legacy-compatibility
profiling.tracing — Deterministic profiler	https://docs.python.org/dev/library/profiling.tracing.html
What is deterministic profiling?	https://docs.python.org/dev/library/profiling.tracing.html#what-is-deterministic-profiling
Command-line interface	https://docs.python.org/dev/library/profiling.tracing.html#command-line-interface
Programmatic usage examples	https://docs.python.org/dev/library/profiling.tracing.html#programmatic-usage-examples
Basic profiling	https://docs.python.org/dev/library/profiling.tracing.html#basic-profiling
Using the Profile class	https://docs.python.org/dev/library/profiling.tracing.html#using-the-profile-class
Module reference	https://docs.python.org/dev/library/profiling.tracing.html#module-reference
Using a custom timer	https://docs.python.org/dev/library/profiling.tracing.html#using-a-custom-timer
Limitations	https://docs.python.org/dev/library/profiling.tracing.html#limitations
profiling.sampling — Statistical profiler	https://docs.python.org/dev/library/profiling.sampling.html
What is statistical profiling?	https://docs.python.org/dev/library/profiling.sampling.html#what-is-statistical-profiling
How time is estimated	https://docs.python.org/dev/library/profiling.sampling.html#how-time-is-estimated
When to use a different approach	https://docs.python.org/dev/library/profiling.sampling.html#when-to-use-a-different-approach
Quick examples	https://docs.python.org/dev/library/profiling.sampling.html#quick-examples
Commands	https://docs.python.org/dev/library/profiling.sampling.html#commands
The run command	https://docs.python.org/dev/library/profiling.sampling.html#the-run-command
The attach command	https://docs.python.org/dev/library/profiling.sampling.html#the-attach-command
The replay command	https://docs.python.org/dev/library/profiling.sampling.html#the-replay-command
Profiling in production	https://docs.python.org/dev/library/profiling.sampling.html#profiling-in-production
Platform requirements	https://docs.python.org/dev/library/profiling.sampling.html#platform-requirements
Version compatibility	https://docs.python.org/dev/library/profiling.sampling.html#version-compatibility
Sampling configuration	https://docs.python.org/dev/library/profiling.sampling.html#sampling-configuration
Sampling rate and duration	https://docs.python.org/dev/library/profiling.sampling.html#sampling-rate-and-duration
Thread selection	https://docs.python.org/dev/library/profiling.sampling.html#thread-selection
Blocking mode	https://docs.python.org/dev/library/profiling.sampling.html#blocking-mode
Special frames	https://docs.python.org/dev/library/profiling.sampling.html#special-frames
Opcode-aware profiling	https://docs.python.org/dev/library/profiling.sampling.html#opcode-aware-profiling
Real-time statistics	https://docs.python.org/dev/library/profiling.sampling.html#real-time-statistics
Subprocess profiling	https://docs.python.org/dev/library/profiling.sampling.html#subprocess-profiling
Sampling efficiency	https://docs.python.org/dev/library/profiling.sampling.html#sampling-efficiency
Profiling modes	https://docs.python.org/dev/library/profiling.sampling.html#profiling-modes
Wall-clock mode	https://docs.python.org/dev/library/profiling.sampling.html#wall-clock-mode
CPU mode	https://docs.python.org/dev/library/profiling.sampling.html#cpu-mode
Comparing wall-clock and CPU profiles	https://docs.python.org/dev/library/profiling.sampling.html#comparing-wall-clock-and-cpu-profiles
GIL mode	https://docs.python.org/dev/library/profiling.sampling.html#gil-mode
Exception mode	https://docs.python.org/dev/library/profiling.sampling.html#exception-mode
Output formats	https://docs.python.org/dev/library/profiling.sampling.html#output-formats
pstats format	https://docs.python.org/dev/library/profiling.sampling.html#pstats-format
Collapsed stacks format	https://docs.python.org/dev/library/profiling.sampling.html#collapsed-stacks-format
Flame graph format	https://docs.python.org/dev/library/profiling.sampling.html#flame-graph-format
Gecko format	https://docs.python.org/dev/library/profiling.sampling.html#gecko-format
Heatmap format	https://docs.python.org/dev/library/profiling.sampling.html#heatmap-format
Binary format	https://docs.python.org/dev/library/profiling.sampling.html#binary-format
Record and replay workflow	https://docs.python.org/dev/library/profiling.sampling.html#record-and-replay-workflow
Live mode	https://docs.python.org/dev/library/profiling.sampling.html#live-mode
Keyboard commands	https://docs.python.org/dev/library/profiling.sampling.html#keyboard-commands
Async-aware profiling	https://docs.python.org/dev/library/profiling.sampling.html#async-aware-profiling
Async modes	https://docs.python.org/dev/library/profiling.sampling.html#async-modes
Task markers and stack reconstruction	https://docs.python.org/dev/library/profiling.sampling.html#task-markers-and-stack-reconstruction
Option restrictions	https://docs.python.org/dev/library/profiling.sampling.html#option-restrictions
Command-line interface	https://docs.python.org/dev/library/profiling.sampling.html#command-line-interface
Global options	https://docs.python.org/dev/library/profiling.sampling.html#global-options
Sampling options	https://docs.python.org/dev/library/profiling.sampling.html#sampling-options
Mode options	https://docs.python.org/dev/library/profiling.sampling.html#mode-options
Output options	https://docs.python.org/dev/library/profiling.sampling.html#output-options
pstats display options	https://docs.python.org/dev/library/profiling.sampling.html#pstats-display-options
Run command options	https://docs.python.org/dev/library/profiling.sampling.html#run-command-options
pstats — Statistics for profilers	https://docs.python.org/dev/library/pstats.html
Reading and displaying profile data	https://docs.python.org/dev/library/pstats.html#reading-and-displaying-profile-data
Working with statistics	https://docs.python.org/dev/library/pstats.html#working-with-statistics
Filtering output	https://docs.python.org/dev/library/pstats.html#filtering-output
Analyzing call relationships	https://docs.python.org/dev/library/pstats.html#analyzing-call-relationships
Combining multiple profiles	https://docs.python.org/dev/library/pstats.html#combining-multiple-profiles
The Stats class	https://docs.python.org/dev/library/pstats.html#the-stats-class
Command-line interface	https://docs.python.org/dev/library/pstats.html#command-line-interface
timeit — Measure execution time of small code snippets	https://docs.python.org/dev/library/timeit.html
Basic Examples	https://docs.python.org/dev/library/timeit.html#basic-examples
Python Interface	https://docs.python.org/dev/library/timeit.html#python-interface
Command-Line Interface	https://docs.python.org/dev/library/timeit.html#command-line-interface
Examples	https://docs.python.org/dev/library/timeit.html#examples
trace — Trace or track Python statement execution	https://docs.python.org/dev/library/trace.html
Command-Line Usage	https://docs.python.org/dev/library/trace.html#command-line-usage
Main options	https://docs.python.org/dev/library/trace.html#main-options
Modifiers	https://docs.python.org/dev/library/trace.html#modifiers
Filters	https://docs.python.org/dev/library/trace.html#filters
Programmatic Interface	https://docs.python.org/dev/library/trace.html#programmatic-interface
tracemalloc — Trace memory allocations	https://docs.python.org/dev/library/tracemalloc.html
Examples	https://docs.python.org/dev/library/tracemalloc.html#examples
Display the top 10	https://docs.python.org/dev/library/tracemalloc.html#display-the-top-10
Compute differences	https://docs.python.org/dev/library/tracemalloc.html#compute-differences
Get the traceback of a memory block	https://docs.python.org/dev/library/tracemalloc.html#get-the-traceback-of-a-memory-block
Pretty top	https://docs.python.org/dev/library/tracemalloc.html#pretty-top
Record the current and peak size of all traced memory blocks	https://docs.python.org/dev/library/tracemalloc.html#record-the-current-and-peak-size-of-all-traced-memory-blocks
API	https://docs.python.org/dev/library/tracemalloc.html#api
Functions	https://docs.python.org/dev/library/tracemalloc.html#functions
DomainFilter	https://docs.python.org/dev/library/tracemalloc.html#domainfilter
Filter	https://docs.python.org/dev/library/tracemalloc.html#filter
Frame	https://docs.python.org/dev/library/tracemalloc.html#frame
Snapshot	https://docs.python.org/dev/library/tracemalloc.html#snapshot
Statistic	https://docs.python.org/dev/library/tracemalloc.html#statistic
StatisticDiff	https://docs.python.org/dev/library/tracemalloc.html#statisticdiff
Trace	https://docs.python.org/dev/library/tracemalloc.html#trace
Traceback	https://docs.python.org/dev/library/tracemalloc.html#traceback
test — Regression tests package for Python	https://docs.python.org/dev/library/test.html
Audit events table	https://docs.python.org/dev/library/audit_events.html
Report a bug	https://docs.python.org/dev/bugs.html
Show source	https://github.com/python/cpython/blob/main/Doc/library/debug.rst?plain=1
index	https://docs.python.org/dev/genindex.html
modules	https://docs.python.org/dev/py-modindex.html
next	https://docs.python.org/dev/library/audit_events.html
previous	https://docs.python.org/dev/library/test.html
Python	https://www.python.org/
3.15.0a5 Documentation	https://docs.python.org/dev/index.html
The Python Standard Library	https://docs.python.org/dev/library/index.html
Debugging and profiling	https://docs.python.org/dev/library/debug.html
Copyright	https://docs.python.org/dev/copyright.html
History and License	https://docs.python.org/license.html
Please donate.	https://www.python.org/psf/donations/
Found a bug	https://docs.python.org/bugs.html
Sphinx	https://www.sphinx-doc.org/

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