Add python sample

snippets/python3-sample.md

@@ -0,0 +1,134 @@
+# Step 0: Install Python 3 and requests module
+Download and install the Python 3 then install with pip command 'requests' library. You can now run the snippet with python command. 
+
+# Step 1: Requesting resources
+```Python
+import requests
+
+baseUrl = "http://services.odata.org/v4/TripPinServiceRW/"
+response = requests.get(baseUrl +"People")
+
+if response.status_code != 200:
+    print("error: " + str(response.status_code))
+    print(response.text)
+else:
+    print("success")
+    print(response.json())
+
+```
+
+# Step 2: Requesting an individual resource
+```Python
+import requests
+
+baseUrl = "http://services.odata.org/v4/TripPinServiceRW/"
+response = requests.get(baseUrl +"People('russellwhyte')")
+
+if response.status_code != 200:
+    print("error: " + str(response.status_code))
+    print(response.text)
+else:
+    print("success")
+    print(response.json())
+```
+
+# Step 3: Queries
+```Python
+import requests
+
+baseUrl = "http://services.odata.org/v4/TripPinServiceRW/"
+
+queryparams = {
+    "$top":2,
+    "$select":"FirstName, LastName",
+    "$filter":"Trips/any(d:d/Budget gt 3000)"
+}
+
+response = requests.get(baseUrl +"People", params=queryparams)
+
+if response.status_code != 200:
+    print("error: " + str(response.status_code))
+    print(response.text)
+else:
+    print("success")
+    print(response.json())
+```
+
+# Step 4: Creating a new resource
+```Python
+import requests
+
+baseUrl = "https://services.odata.org/v4/(S(dhzln0mseufepcdhv3dzuuh4))/TripPinServiceRW/"
+
+newPerson = {
+    "UserName":"jeanbon",
+    "FirstName":"Jean",
+    "LastName":"Bon",
+    "Emails":[
+        "jeanbon2@example.com"
+    ],
+    "AddressInfo":[
+        {
+            "Address": "187 Suffolk Ln.",
+            "City": {
+                "CountryRegion": "United States",
+                "Name": "Boise",
+                "Region": "ID"
+            }
+        }
+    ],
+    "Gender": "Male"
+}
+headers= {
+    'OData-Version': '4.0',
+    'OData-MaxVersion': '4.0'
+}
+
+response = requests.post(baseUrl +"People",headers=headers, json=newPerson, allow_redirects=False)
+
+if response.status_code != 201:
+    print("error: " + str(response.status_code))
+    print(response.request.method)
+    print(response.request.url)
+    print(response.headers)
+    print(response.text)
+else:
+    print("success")
+    print(response.json())
+```
+
+# Step 5: Relating resources
+```Python
+import requests
+
+baseUrl = "http://services.odata.org/v4/TripPinServiceRW/"
+
+payload = {
+    "@odata.id": "http://services.odata.org/V4/TripPinServiceRW/People('russellwhyte')/Trips(0)"
+}
+
+response = requests.post(baseUrl +"People('lewisblack')/Trips/$ref", json=payload)
+
+if response.status_code != 204:
+    print("error: " + str(response.status_code))
+    print(response.text)
+else:
+    print("success")
+    print(response.json())
+
+```
+
+# Step 6: Invoking a function
+```Python
+import requests
+
+baseUrl = "http://services.odata.org/v4/TripPinServiceRW/"
+response = requests.get(baseUrl +"People('russellwhyte')/Trips(0)/Microsoft.OData.SampleService.Models.TripPin.GetInvolvedPeople()")
+
+if response.status_code != 200:
+    print("error: " + str(response.status_code))
+    print(response.text)
+else:
+    print("success")
+    print(response.json())
+```