Update app.py

app.py

@@ -11,10 +11,9 @@ results = os.popen(f"pip3 install -r requirements.txt -i https://pypi.org/simple
 print("step1:", results.readlines())
 results = os.popen(f"pip3 uninstall scepter -y")
 print("step2:", results.readlines())
-# results = os.popen(f"pip3 install scepter -i https://pypi.org/simple")
-# print("step3:", results.readlines())
-results = os.popen(f"pip3 install {os.getenv['SCEPTER_WHL']}")
-print("step3:", results.readlines())
+scepter_whl = os.environ.get("SCEPTER_WHL","scepter")
+results = os.popen(f"pip3 install {scepter_whl} -i https://pypi.org/simple")
+print("step3:", scepter_whl, results.readlines())
 results = os.popen(f"pip3 list")
 print("step4:", results.readlines())
 #results = os.popen(f"sudo chmod 777 /data")