diff --git a/src/interface.jl b/src/interface.jl
index cbb5b50..f29a03f 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -6,10 +6,18 @@ export agent, addNewMessage, clearMessage, removeLatestMsg, generatePrompt_token
 
 using JSON3, DataStructures, Dates
 
+# ---------------------------------------------------------------------------- #
+#                              pythoncall setting                              #
+# ---------------------------------------------------------------------------- #
 # Ref: https://github.com/JuliaPy/PythonCall.jl/issues/252
+# by setting the following variables, PythonCall will use system python or conda python and 
+# packages installed by system or conda
+# if these setting are not set (comment out), PythonCall will use its own python and package that
+# installed by CondaPkg
 ENV["JULIA_CONDAPKG_BACKEND"] = "Null"
 systemPython = split(read(`which python`, String), "\n")[1]
 ENV["JULIA_PYTHONCALL_EXE"] = systemPython # find python location with $> which python  ex. raw"/root/conda/bin/python"
+
 using PythonCall
 const py_agents = PythonCall.pynew()
 const py_llms = PythonCall.pynew()