python_minorversion=`echo "$python_fullversion" | sed 's/^[0-9]*\.\([0-9]*\).*/\1/'`

python_version=`echo "$python_fullversion" | sed 's/^\([0-9]*\.[0-9]*\).*/\1/'`

# Reject unsupported Python versions as soon as practical.

if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt4; then

as_fn_error $? "Python version $python_version is too old (version 2.4 or later is required)" "$LINENO" 5

if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt6; then

as_fn_error $? "Python version $python_version is too old (version 2.6 or later is required)" "$LINENO" 5

fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for Python distutils module" >&5

language, you need a <productname>Python</productname>

installation with the header files and

the <application>distutils</application> module. The minimum

required version is <productname>Python</productname> 2.4.

required version is <productname>Python</productname> 2.6.

<productname>Python 3</productname> is supported if it's

version 3.1 or later; but see

<xref linkend="plpython-python23"/>

<para>

Context managers syntax using the <literal>with</literal> keyword

is available by default in Python 2.6. If using PL/Python with an

older Python version, it is still possible to use explicit

subtransactions, although not as transparently. You can call the

is available by default in Python 2.6. For compatibility with

older Python versions, you can call the

subtransaction manager's <literal>__enter__</literal> and

<literal>__exit__</literal> functions using the

<literal>enter</literal> and <literal>exit</literal> convenience

$$ LANGUAGE plpythonu;

</programlisting>

</para>

<note>

<para>

Although context managers were implemented in Python 2.5, to use

the <literal>with</literal> syntax in that version you need to

use a <ulink

url="https://docs.python.org/release/2.5/ref/future.html">future

statement</ulink>. Because of implementation details, however,

you cannot use future statements in PL/Python functions.

</para>

</note>

</sect2>

</sect1>

Guide to alternative expected files:

plpython_error_0.outPython 2.4 and older

plpython_error_5.outPython 3.5 and newer

plpython_unicode.outserver encoding != SQL_ASCII

plpython_unicode_3.outserver encoding == SQL_ASCII

plpython_subtransaction_0.outPython 2.4 and older (without with statement)

plpython_subtransaction_5.outPython 2.5 (without with statement)

plpython_types_3.outPython 3.x