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Astropy v8.0.0b1

  • Getting Started
  • User Guide
    • Constants (astropy.constants)
    • Units and Quantities (astropy.units)
    • N-Dimensional Datasets (astropy.nddata)
    • Data Tables (astropy.table)
    • Time and Dates (astropy.time)
    • Time Series (astropy.timeseries)
    • Astronomical Coordinate Systems (astropy.coordinates)
    • World Coordinate System (astropy.wcs)
    • Models and Fitting (astropy.modeling)
    • Uncertainties and Distributions (astropy.uncertainty)
    • Overview of Astropy File I/O
    • High-level Unified File I/O
    • FITS File Handling (astropy.io.fits)
      • FITS Headers
      • Image Data
      • Table Data
      • Verification
      • Less Familiar Objects
      • Executable Scripts
      • Miscellaneous Features
      • Obtaining subsets from cloud-hosted FITS files
      • astropy.io.fits FAQ
      • Header Interface Transition Guide
      • astropy.io.fits History
      • Reference/API
        • File Handling and Convenience Functions
        • HDU Lists
        • Header Data Unit
        • Headers
        • Cards
        • Tables
        • Images
        • Differs
        • Verification Options
        • Tiled Compression
    • Text Tables (astropy.io.ascii)
    • VOTable Handling (astropy.io.votable)
    • ECVS, HDF5, Parquet, PyArrow CSV, YAML (astropy.io.misc)
    • Cosmological Calculations (astropy.cosmology)
    • Convolution and Filtering (astropy.convolution)
    • IERS data access (astropy.utils.iers)
    • Data Visualization (astropy.visualization)
    • Astrostatistics Tools (astropy.stats)
    • Masked Values and Quantities (astropy.utils.masked)
    • SAMP (Simple Application Messaging Protocol) (astropy.samp)
    • Configuration System (astropy.config)
    • I/O Registry (astropy.io.registry)
    • I/O Typing (astropy.io.typing)
    • Logging system
    • Python warnings system
    • Astropy Core Package Utilities (astropy.utils)
    • Environment variables
    • Astropy Glossary
  • Contributing
  • Project Details
  • User Guide
  • FITS File Handling (astropy.io.fits)
  • Reference/API

Reference/API#

  • File Handling and Convenience Functions
    • open()
    • writeto()
    • info()
    • printdiff()
    • append()
    • update()
    • getdata()
    • getheader()
    • getval()
    • setval()
    • delval()
  • HDU Lists
    • HDUList
  • Header Data Unit
    • PrimaryHDU
    • GroupsHDU
    • GroupData
      • Group
    • StreamingHDU
  • Headers
    • Header
  • Cards
    • Card
  • Tables
    • BinTableHDU
    • TableHDU
    • Column
    • ColDefs
    • FITS_rec
    • FITS_record
    • Table Functions
      • tabledump()
      • tableload()
      • table_to_hdu()
  • Images
    • ImageHDU
    • CompImageHDU
    • Section
    • CompImageSection
  • Differs
    • FITSDiff
    • HDUDiff
    • HeaderDiff
    • ImageDataDiff
    • RawDataDiff
    • TableDataDiff
  • Verification Options
    • 'exception'
    • 'ignore'
    • 'fix'
    • 'silentfix'
    • 'warn'
  • Tiled Compression
    • astropy.io.fits.hdu.compressed._tiled_compression Module
      • Functions
    • astropy.io.fits.hdu.compressed._codecs Module
      • Classes
      • Class Inheritance Diagram
    • astropy.io.fits.hdu.compressed._quantization Module
      • Classes
      • Class Inheritance Diagram

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Code of Conduct

Updated on 21 May 2026 , built with Sphinx 9.1.0