Merge pull request #77209 from mrbullwinkle/mrb_05_20_2019_python

update script blocks

Author: PRMerger20

articles/azure-monitor/app/opencensus-python.md

@@ -73,10 +73,12 @@ First you have to create an Application Insights resource which will generate an
 
 ## OpenCensus Python package
 
-1. Install the Open Census package for Python with pip or pipenv from the command line:
+1. Install the Open Census package for Python and exporter with pip or pipenv from the command line:
 
-    ```python
+    ```console
     python -m pip install opencensus
+    python -m pip install opencensus-ext-ocagent
+
     # pip env install opencensus
     ```
 
@@ -87,20 +89,20 @@ First you have to create an Application Insights resource which will generate an
 
     ```python
     from opencensus.trace.tracer import Tracer
-    
+
     def main():
         while True:
             valuePrompt()
-    
+
     def valuePrompt():
         tracer = Tracer()
         with tracer.span(name="test") as span:
             line = input("Enter a value: ")
             print(line)
-    
+
     if __name__ == "__main__":
         main()
-    
+
     ```
 
 3. Running the code will repeatedly prompt you to enter a value. With each entry, the value will be printed to the shell, and a corresponding piece of **SpanData** will be generated by the OpenCensus Python Module. The OpenCensus project defines a [_trace as a tree of spans_](https://opencensus.io/core-concepts/tracing/).
@@ -122,32 +124,33 @@ First you have to create an Application Insights resource which will generate an
     ```python
     from opencensus.trace.tracer import Tracer
     from opencensus.trace import config_integration
-    from opencensus.trace.exporters.ocagent import trace_exporter
+    from opencensus.ext.ocagent.trace_exporter import TraceExporter
     from opencensus.trace import tracer as tracer_module
-    
+
     import os
-    
-    def main():        
+
+    def main():
         while True:
             valuePrompt()
-    
+
     def valuePrompt():
-        export_LocalForwarder = trace_exporter.TraceExporter(
+        export_LocalForwarder = TraceExporter(
         service_name=os.getenv('SERVICE_NAME', 'python-service'),
         endpoint=os.getenv('OCAGENT_TRACE_EXPORTER_ENDPOINT'))
-        
+
         tracer = Tracer(exporter=export_LocalForwarder)
         with tracer.span(name="test") as span:
             line = input("Enter a value: ")
             print(line)
-    
+
     if __name__ == "__main__":
         main()
+
     ```
 
 5. If you save and try running the above module, you may receive a `ModuleNotFoundError` for `grpc`. If this occurs run the following to install the [grpcio package](https://pypi.org/project/grpcio/) with:
 
-    ```
+    ```console
     python -m pip install grpcio
     ```