This version of Iguana defines the following environment variables:

• iguana_dir, which specifies the directory in which Iguana is installed;
• chameleon_dir (defined for Windows only), which specifies the directory in which Chameleon is installed, if it is installed on this computer.

In addition, Iguana defines the CHM_PYTHON_LIB_PATH environment variable if it is not already defined. This variable specifies the location of the Python libraries that ship with Iguana and/or Chameleon. When Iguana is defining CHM_PYTHON_LIB_PATH, the value of this variable is set using the following criteria:

• On Unix, Linux and Mac OS X, CHM_PYTHON_LIB_PATH is set to the python_lib subdirectory of the directory specified by the iguana_dir environment variable.
• On Windows, Iguana checks to see whether Chameleon is installed. If Chameleon is installed, CHM_PYTHON_LIB_PATH is defined to include two directories: the lib subdirectory of the directory specified by the iguana_dir environment variable, and the lib subdirectory of the directory specified by the chameleon_dir environment variable.
• On Windows, if Chameleon is not installed, CHM_PYTHON_LIB_PATH is set to the lib subdirectory of the directory specified by the iguana_dir variable. A log message (of Informational type) notifies you that your Iguana server could not find an installation of Chameleon.

If you have stored custom Python modules in a directory other than those specified in CHM_PYTHON_LIB_PATH, you can edit this environment variable to include the directory in which you have stored the Python modules. See Editing an Environment Variable for more information on how to edit an environment variable.