Update azure-pipelines.yml for Azure Pipelines

Author: ddavtian

azure-pipelines.yml

@@ -11,15 +11,14 @@ pool: E5-Agent-Pool
 steps:
 - task: UsePythonVersion@0
   inputs:
-    versionSpec: '$(python.version)'
-  displayName: 'Use Python $(python.version)'
+    versionSpec: '3.8'
 
 - script: |
-    python -m pip install --upgrade pip
-    pip install -r requirements.txt
+    python3 -m pip install --upgrade pip
+    pip3 install -r requirements.txt
   displayName: 'Install dependencies'
 
 - script: |
-    pip install pytest pytest-azurepipelines
+    pip3 install pytest pytest-azurepipelines
     pytest
   displayName: 'pytest'