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GeezerVison is showing docs.python.org — Debugging and profiling

Debugging and profiling¶

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 breakdown of execution times, allowing you to identify bottlenecks in your programs. Auditing events provide visibility into runtime behaviors that would otherwise require intrusive debugging or patching.

  • Audit events table
  • bdb — Debugger framework
  • faulthandler — Dump the Python traceback
    • Dumping the traceback
    • Dumping the C stack
      • C Stack Compatibility
    • Fault handler state
    • Dumping the tracebacks after a timeout
    • Dumping the traceback on a user signal
    • Issue with file descriptors
    • Example
  • pdb — The Python Debugger
    • Command-line interface
    • Debugger commands
  • profiling — Python profilers
    • Introduction to profiling
    • Choosing a profiler
      • When to use statistical sampling
      • When to use deterministic tracing
    • Quick start
      • Statistical profiling
      • Deterministic profiling
    • Understanding profile output
    • Legacy compatibility
      • profiling.tracing — Deterministic profiler
        • What is deterministic profiling?
        • Command-line interface
        • Programmatic usage examples
          • Basic profiling
          • Using the Profile class
        • Module reference
        • Using a custom timer
        • Limitations
      • profiling.sampling — Statistical profiler
        • What is statistical profiling?
          • How time is estimated
          • When to use a different approach
        • Quick examples
        • Commands
          • The run command
          • The attach command
          • The dump command
          • The replay command
          • Profiling in production
          • Platform requirements
          • Version compatibility
        • Sampling configuration
          • Sampling rate and duration
          • Thread selection
          • Blocking mode
          • Special frames
          • Opcode-aware profiling
          • Real-time statistics
          • Subprocess profiling
          • Sampling efficiency
        • Profiling modes
          • Wall-clock mode
          • CPU mode
          • Comparing wall-clock and CPU profiles
          • GIL mode
          • Exception mode
        • Output formats
          • pstats format
          • Collapsed stacks format
          • Flame graph format
            • Differential flame graphs
          • Gecko format
          • Heatmap format
          • Binary format
        • Record and replay workflow
        • Live mode
          • Keyboard commands
        • Async-aware profiling
          • Async modes
          • Task markers and stack reconstruction
          • Option restrictions
        • Command-line interface
          • Global options
          • Dump options
          • Sampling options
          • Mode options
          • Output options
          • pstats display options
          • Run command options
  • pstats — Statistics for profilers
    • Reading and displaying profile data
      • Working with statistics
      • Filtering output
      • Analyzing call relationships
      • Combining multiple profiles
    • The Stats class
    • Command-line interface
  • timeit — Measure execution time of small code snippets
    • Basic examples
    • Python interface
    • Command-line interface
    • Examples
  • trace — Trace or track Python statement execution
    • Command-Line Usage
      • Main options
      • Modifiers
      • Filters
    • Programmatic Interface
  • tracemalloc — Trace memory allocations
    • Examples
      • Display the top 10
      • Compute differences
      • Get the traceback of a memory block
      • Pretty top
        • Record the current and peak size of all traced memory blocks
    • API
      • Functions
      • DomainFilter
      • Filter
      • Frame
      • Snapshot
      • Statistic
      • StatisticDiff
      • Trace
      • Traceback
© Copyright 2001 Python Software Foundation.
This page is licensed under the Python Software Foundation License Version 2.
Examples, recipes, and other code in the documentation are additionally licensed under the Zero Clause BSD License.
See History and License for more information.

The Python Software Foundation is a non-profit corporation. Please donate.

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