Fix: Handle case where Python version is already installed (#222) (#1115)

* Fix: Handle case where Python version is already installed in dev container (#617)

* Incorporated Review Comment: Version exist handling

src/python/install.sh

@@ -465,16 +465,18 @@ install_prev_vers_cpython() {
 install_cpython() {
     VERSION=$1
     INSTALL_PATH="${PYTHON_INSTALL_PATH}/${VERSION}"
+
+    # Check if the specified Python version is already installed
     if [ -d "${INSTALL_PATH}" ]; then
         echo "(!) Python version ${VERSION} already exists."
-        exit 1
-    fi
+    else
         mkdir -p /tmp/python-src ${INSTALL_PATH}
         cd /tmp/python-src
         cpython_tgz_filename="Python-${VERSION}.tgz"
         cpython_tgz_url="https://www.python.org/ftp/python/${VERSION}/${cpython_tgz_filename}"
         echo "Downloading ${cpython_tgz_filename}..."
         curl -sSL -o "/tmp/python-src/${cpython_tgz_filename}" "${cpython_tgz_url}"
+    fi
 }
 
 install_from_source() {
@@ -560,11 +562,10 @@ install_using_oryx() {
     VERSION=$1
     INSTALL_PATH="${PYTHON_INSTALL_PATH}/${VERSION}"
 
+    # Check if the specified Python version is already installed
     if [ -d "${INSTALL_PATH}" ]; then
         echo "(!) Python version ${VERSION} already exists."
-        exit 1
-    fi
-
+    else
         # The python install root path may not exist, so create it
         mkdir -p "${PYTHON_INSTALL_PATH}"
         oryx_install "python" "${VERSION}" "${INSTALL_PATH}" "lib" || return 1
@@ -574,6 +575,7 @@ install_using_oryx() {
         ln -s "${INSTALL_PATH}/bin/python3-config" "${INSTALL_PATH}/bin/python-config"
 
         add_symlink
+    fi
 }
 
 sudo_if() {