子包的当前状态

Astropy得益于广泛测试的遗留代码的添加，以及新的开发，这导致了子包之间稳定性的变化。本文档总结了Astropy子包的当前状态，以便用户了解他们将来可能会在哪里进行更改，以及哪些子包可以安全地用于生产代码。

分类如下：

	Planned
	Actively developed, be prepared for possible significant changes.
	Reasonably stable, any significant changes/additions will generally include backwards-compatiblity.
	Mature. Additions/improvements possible, but no major changes planned.
	Pending deprecation. Might be deprecated in a future version.
	Deprecated. Might be removed in a future version.

当前计划和现有的子包包括：

Sub-Package		Comments
astropy.config		Configuration received major overhaul in v0.4. Since then on, the package has been stable.
astropy.constants		The package has been stable except for the occasional additions of new constants. Since v3.0, it includes the ability to use sets of constants from previous versions.
astropy.convolution		New top-level package in v0.3 (was previously part of astropy.nddata). A major consistency improvement between fft/non-fft convolution, which is not fully backward-compatible, was added in 2.0.
astropy.coordinates		New in v0.2, major changes in v0.4. Subsequent versions should maintain a stable/backwards-compatible API, following the plan of APE 5. Further major additions/enhancements likely, but with basic framework unchanged.
astropy.cosmology		Incremental improvements since v0.1, stable API last several versions.
astropy.io.ascii		Originally developed as asciitable, and has maintained a stable API.
astropy.io.fits		Originally developed as pyfits, and retains an API consistent with the standalone version.
astropy.io.misc		The functionality that is currently present is stable, but this sub-package will likely see major additions in future.
astropy.io.votable		Originally developed as vo.table, and has a stable API.
astropy.modeling		New in v0.3. Major changes in v1.0, significant additions planned. Backwards-compatibility likely to be maintained, but not guaranteed.
astropy.nddata		Significantly revised in v1.0 to implement APE 7. Major changes in the API are not anticipated, broader use may reveal flaws that require API changes.
astropy.samp		Virtual Observatory service access: SAMP. This was renamed from astropy.vo.samp to astropy.samp in 2.0.
astropy.stats		Likely to maintain backwards-compatibility, but functionality continually being expanded, so significant additions likely in the future.
astropy.table		Incremental improvements since v0.1, mostly stable API with backwards compatibility an explicit goal.
astropy.time		Incremental improvements since v0.1, API likely to remain stable for the foreseeable future.
astropy.timeseries		New in v3.2, in heavy development.
astropy.units		Incremental improvements since v0.4. Functionality mature and unlikely to change. Efforts focused on performance and increased interoperability with Numpy functions.
astropy.utils		Contains mostly utilities destined for internal use with other parts of Astropy. Existing functionality generally stable, but regular additions and occasional changes.
astropy.uncertainty		New in v3.1, in development.
astropy.visualization		New in v1.0, and in development.
astropy.visualization.wcsaxes		New in v1.3. Originally developed as wcsaxes and has maintained a stable API.
astropy.wcs		Originally developed as pywcs, and has a stable API for now. However, there are plans to generalize the WCS interface to accommodate non-FITS WCS transformations, and this may lead to small changes in the user interface.