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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Environment Variables</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="PL/Python - Python Procedural Language" HREF="plpython.html"><LINK REL="PREVIOUS" TITLE="Utility Functions" HREF="plpython-util.html"><LINK REL="NEXT" TITLE="Server Programming Interface" HREF="spi.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="Utility Functions" HREF="plpython-util.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="plpython.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Chapter 42. PL/Python - Python Procedural Language</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="Server Programming Interface" HREF="spi.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="PLPYTHON-ENVAR" >42.10. Environment Variables</A ></H1 ><P > Some of the environment variables that are accepted by the Python interpreter can also be used to affect PL/Python behavior. They would need to be set in the environment of the main PostgreSQL server process, for example in a start script. The available environment variables depend on the version of Python; see the Python documentation for details. At the time of this writing, the following environment variables have an affect on PL/Python, assuming an adequate Python version: <P ></P ></P><UL ><LI ><P ><TT CLASS="ENVAR" >PYTHONHOME</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONPATH</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONY2K</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONOPTIMIZE</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONDEBUG</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONVERBOSE</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONCASEOK</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONDONTWRITEBYTECODE</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONIOENCODING</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONUSERBASE</TT ></P ></LI ><LI ><P ><TT CLASS="ENVAR" >PYTHONHASHSEED</TT ></P ></LI ></UL ><P> (It appears to be a Python implementation detail beyond the control of PL/Python that some of the environment variables listed on the <TT CLASS="COMMAND" >python</TT > man page are only effective in a command-line interpreter and not an embedded Python interpreter.) </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="plpython-util.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="spi.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Utility Functions</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="plpython.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Server Programming Interface</TD ></TR ></TABLE ></DIV ></BODY ></HTML >