sis-local: Update install path and improve running_in_sis() impl (#20)

* Update install path and improve running_in_sis() impl

* More explainable running_in_sis()

samples/streamlit-in-snowflake/sis-local/README.md

@@ -15,7 +15,7 @@ and provide a much smoother experience doing local development and porting to Si
 Just like Snowpark, **it requires python 3.8.**
 
 ```shell
-pip install "streamlit_in_snowflake @ git+https://github.com/blackary/sis-tricks.git#subdirectory=sis-local"
+pip install "streamlit_in_snowflake @ git+https://github.com/Snowflake-Labs/sf-samples.git#subdirectory=samples/streamlit-in-snowflake/sis-local"
 ```
 
 In general, we recommend managing your environment with Conda,
@@ -33,11 +33,11 @@ from snowflake.snowpark.exceptions import SnowparkSessionException
 
 
 def running_in_sis() -> bool:
-    try:
-        sess = get_active_session()
-        return True
-    except SnowparkSessionException:
-        return False
+    import snowflake.connector.connection
+    import inspect
+    # snowflake.connector.connection.SnowflakeConnection does not exist inside a Stored Proc or Streamlit.
+    # It is only part of the external package. So this returns true only in SiS.
+    return 0 == len([x for x in inspect.getmembers(snowflake.connector.connection) if x[0] == 'SnowflakeConnection'])
 
 
 if running_in_sis():

samples/streamlit-in-snowflake/sis-local/example/README.md

@@ -5,7 +5,7 @@
 3. Run the following
 
 ```shell
-pip install "streamlit_in_snowflake @ git+https://github.com/blackary/sis-tricks.git#subdirectory=sis-local"
+pip install "streamlit_in_snowflake @ git+https://github.com/Snowflake-Labs/sf-samples.git#subdirectory=samples/streamlit-in-snowflake/sis-local"
 python -m streamlit run sis_app.py
 ```
 
@@ -28,6 +28,6 @@ conda init --all # See conda docs on what this does / how to use it
 conda env create -f environment.yml
 conda activate sis-example
 # Install streamlit_in_snowflake and run the example app as above
-pip install -r "streamlit_in_snowflake @ git+https://github.com/blackary/sis-tricks.git#subdirectory=sis-local"
+pip install "streamlit_in_snowflake @ git+https://github.com/Snowflake-Labs/sf-samples.git#subdirectory=samples/streamlit-in-snowflake/sis-local"
 python -m streamlit run sis_app.py
 ```

samples/streamlit-in-snowflake/sis-local/example/sis_app.py

@@ -3,11 +3,11 @@
 
 
 def running_in_sis() -> bool:
-    try:
-        sess = get_active_session()
-        return True
-    except SnowparkSessionException:
-        return False
+    import snowflake.connector.connection
+    import inspect
+    # snowflake.connector.connection.SnowflakeConnection does not exist inside a Stored Proc or Streamlit.
+    # It is only part of the external package. So this returns true only in SiS.
+    return 0 == len([x for x in inspect.getmembers(snowflake.connector.connection) if x[0] == 'SnowflakeConnection'])
 
 
 if running_in_sis():