Fix examples for Azure Exporter

Author: lzchen

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

@@ -35,9 +35,9 @@ First, instrument your Python application with latest [OpenCensus Python SDK](..
     ```python
     OPENCENSUS = {
         'TRACE': {
-            'SAMPLER': 'opencensus.trace.samplers.ProbabilitySampler(rate=0.5)',
+            'SAMPLER': 'opencensus.trace.samplers.ProbabilitySampler(rate=1)',
             'EXPORTER': '''opencensus.ext.azure.trace_exporter.AzureExporter(
-                service_name='foobar',
+                connection_string="InstrumentationKey=<your-ikey-here>"
             )''',
         }
     }
@@ -50,9 +50,9 @@ First, instrument your Python application with latest [OpenCensus Python SDK](..
         'TRACE': {
             'SAMPLER': 'opencensus.trace.samplers.ProbabilitySampler(rate=0.5)',
             'EXPORTER': '''opencensus.ext.azure.trace_exporter.AzureExporter(
-                service_name='foobar',
+                connection_string="InstrumentationKey=<your-ikey-here>",
             )''',
-            'BLACKLIST_PATHS': 'https://example.com',  <--- This site will not be traced if a request is sent from it.
+            'BLACKLIST_PATHS': ['https://example.com'],  <--- These sites will not be traced if a request is sent from it.
         }
     }
     ```
@@ -91,9 +91,9 @@ First, instrument your Python application with latest [OpenCensus Python SDK](..
         'TRACE': {
             'SAMPLER': 'opencensus.trace.samplers.ProbabilitySampler(rate=1.0)',
             'EXPORTER': '''opencensus.ext.azure.trace_exporter.AzureExporter(
-                service_name='foobar',
+                connection_string="InstrumentationKey=<your-ikey-here>",
             )''',
-            'BLACKLIST_PATHS': 'https://example.com',  <--- This site will not be traced if a request is sent to it.
+            'BLACKLIST_PATHS': ['https://example.com'],  <--- These sites will not be traced if a request is sent to it.
         }
     }
     ```
@@ -118,9 +118,9 @@ First, instrument your Python application with latest [OpenCensus Python SDK](..
             'TRACE': {
                 'SAMPLER': 'opencensus.trace.samplers.ProbabilitySampler(rate=1.0)',
                 'EXPORTER': '''opencensus.ext.azure.trace_exporter.AzureExporter(
-                    service_name='foobar',
+                    connection_string="InstrumentationKey=<your-ikey-here>",
                 )''',
-                'BLACKLIST_PATHS': 'https://example.com',  <--- This site will not be traced if a request is sent to it.
+                'BLACKLIST_PATHS': ['https://example.com'],  <--- These sites will not be traced if a request is sent to it.
             }
         }
     }