Issue #12306: Add ZLIB_RUNTIME_VERSION to the zlib module.
While we're at it, also document ZLIB_VERSION.
Patch by Torsten Landschoff.
diff --git a/Doc/library/zlib.rst b/Doc/library/zlib.rst
index 54835e7..aab9ec7 100644
--- a/Doc/library/zlib.rst
+++ b/Doc/library/zlib.rst
@@ -122,6 +122,7 @@
won't fit into memory at once. The *wbits* parameter controls the size of the
window buffer.
+
Compression objects support the following methods:
@@ -217,6 +218,26 @@
seeks into the stream at a future point.
+Information about the version of the zlib library in use is available through
+the following constants:
+
+
+.. data:: ZLIB_VERSION
+
+ The version string of the zlib library that was used for building the module.
+ This may be different from the zlib library actually used at runtime, which
+ is available as :const:`ZLIB_RUNTIME_VERSION`.
+
+ .. versionadded:: 3.3
+
+
+.. data:: ZLIB_RUNTIME_VERSION
+
+ The version string of the zlib library actually loaded by the interpreter.
+
+ .. versionadded:: 3.3
+
+
.. seealso::
Module :mod:`gzip`