checking version before installing

app.py

@@ -1,8 +1,32 @@
 import os
-os.system('pip install pip==23.3.0')
-os.system('pip uninstall spaces')
-os.system('pip install spaces==0.18.0')
-os.system('pip install gradio==4.0.2')
+import pkg_resources
+
+# Check the installed version of pip
+pip_version = pkg_resources.get_distribution("pip").version
+desired_pip_version = "23.3.0"
+
+if pip_version != desired_pip_version:
+    os.system(f'pip install pip=={desired_pip_version}')
+
+# Check and install the desired version of "spaces" package
+try:
+    spaces_version = pkg_resources.get_distribution("spaces").version
+    desired_spaces_version = "0.18.0"
+
+    if spaces_version != desired_spaces_version:
+        os.system(f'pip install spaces=={desired_spaces_version}')
+except pkg_resources.DistributionNotFound:
+    pass  # "spaces" package is not installed
+
+# Check and install the desired version of "gradio" package
+try:
+    gradio_version = pkg_resources.get_distribution("gradio").version
+    desired_gradio_version = "4.0.2"
+
+    if gradio_version != desired_gradio_version:
+        os.system(f'pip install gradio=={desired_gradio_version}')
+except pkg_resources.DistributionNotFound:
+    pass  # "gradio" package is not installed
 
 
 import gradio as gr