diff --git a/cd.sh b/cd.sh
index 5bec963..b12c1e7 100644
--- a/cd.sh
+++ b/cd.sh
@@ -40,6 +40,9 @@ cd_main () {
 
 cd_set_environment_variables () {
     cd_step "Set environment variables"
+    # set path
+    CD_PATH="$(realpath "${0}")"
+    cd_echo "CD_PATH"
     # set operating system id
     CD_OS_ID="$(cd_grep_os ID)"
     case "${CD_OS_ID}" in
@@ -105,6 +108,7 @@ cd_set_environment_variables () {
             esac
         ;;
     esac
+    cd_split
     cd_echo "CD_OS_ID" "CD_OS_VERSION"
     # universal
     CD_DNS_FILE="/etc/resolv.conf"
@@ -583,12 +587,9 @@ CD_STEP = $((CD_STEP+1))
 }
 
 cd_switch_to_python () {
-local path
     cd_step "Switch to Python"
-    #
-    path="$(realpath "${0}")"
     echo "\
-${path}
+${CD_PATH}
 ↓
 ${CD_PYTHON_PACKAGES}/${CD_GIT_CHILD}"
     "${CD_PYTHON_ALIAS}" -m "${CD_GIT_CHILD}" "${@}"