semantics3

semantics3 is a python client for accessing the Semantics3 Products API, which provides structured information, including pricing histories, for a large number of products. See https://www.semantics3.com for more information.

API documentation can be found at https://www.semantics3.com/docs/

Installation

semantics3 can be installed through pip:

pip install semantics3

To install the egg directly from github

pip install -e git+ssh://[email protected]/Semantics3/semantics3-python.git#egg=semantics3

To install the latest source:

git clone https://github.com/Semantics3/semantics3-python.git
cd semantics3-python
python setup.py install

Requirements

• requests-oauthlib

Getting Started

In order to use the client, you must have both an API key and an API secret. To obtain your key and secret, you need to first create an account at https://www.semantics3.com/ You can access your API access credentials from the user dashboard at https://dashboard.semantics3.com.

Setup Work

Let's lay the groundwork.

from semantics3 import Products

# Set up a client to talk to the Semantics3 API using your Semantics3 API Credentials
sem3 = Products(
    api_key=os.environ['SEMANTICS3_API_KEY'],
    api_secret=os.environ['SEMANTICS3_API_SECRET']
)

First Request aka 'Hello World':

Let's run our first request! We are going to run a simple search for the word "iPhone" as follows:

# Build the request
sem3.products_field("search", "iphone")

# Run the request
results = sem3.get_products()
#or
results = sem3.get()

# View the results of the request
print results

Sample Requests

The following examples show you how to interface with some of the core functionality of the Semantics3 Products API.

Pagination

The example in our "Hello World" script returns the first 10 results. In this example, we'll scroll to subsequent pages, beyond our initial request:

# Build the request
sem3.products_field("search", "iphone")

# Run the request
results = sem3.get_products()

# Specify a cache size
sem3.cache(5)

# Iterate through the results
page_no = 0
for i in sem3.iter():
    page_no += 1
	print "We are at page = %s" % page_no
    print "The results for this page are:"
    print i
    sleep(1) #respect rate limit

Request Timeout

The RealTime API has a hard server-side timeout of 60s (up to 120s for some customers) by default after which the client request will be aborted. You can override this behaviour by setting a client-side timeout value as shown below:

import os
from requests.exceptions import ReadTimeout, ConnectTimeout
from semantics3 import Products

sem3 = Products(
    api_key=os.environ['SEMANTICS3_API_KEY'],
    api_secret=os.environ['SEMANTICS3_API_SECRET'],
    timeout=5
)

try:
    sem3.run_query('realtime/skus', 'GET', { 'url': 'https://www.walmart.com/ip/325408104' })
except (ReadTimeout, ConnectTimeout):
    print('request timed out in 5s')

UPC Query

Running a UPC/EAN/GTIN query is as simple as running a search query:

# Build the request
sem3.products_field("upc", "883974958450")
sem3.products_field("fields", ["name","gtins"])

# Run the request
results = sem3.get_products()

# View the results of the request
print results 

URL Query

Get the picture? You can run URL queries as follows:

sem3.products_field("url", "http://www.walmart.com/ip/15833173")
results = sem3.get_products()
print results

Price Filter

Filter by price using the "lt" (less than) tag:

sem3.products_field("search", "iphone")
sem3.products_field("price", "lt", 300)
results = sem3.get_products()
print results

Category ID Query

To lookup details about a cat_id, run your request against the categories resource:

# Build the request
sem3.categories_field("cat_id", 4992)

# Run the request
results = sem3.get_categories()

# View the results of the request
print results

Webhooks

You can use webhooks to get near-real-time price updates from Semantics3.

Creating a webhook

You can register a webhook with Semantics3 by sending a POST request to "webhooks" endpoint. To verify that your URL is active, a GET request will be sent to your server with a verification_code parameter. Your server should respond with verification_code in the response body to complete the verification process.

params = {
    webhook_uri : "http://mydomain.com/webhooks-callback-url"
}

webhook = sem3.run_query("webhooks", "POST", params)
print webhook["id"]
print webhook["webhook_uri"]

To fetch existing webhooks

webhooks = sem3.run_query("webhooks", "GET")
print webhooks

To remove a webhook

webhook_id = '7JcGN81u'
endpoint = "webhooks/%s" % webhook_id

response = sem3.run_query( endpoint, "DELETE")
print response

Registering events

Once you register a webhook, you can start adding events to it. Semantics3 server will send you notifications when these events occur. To register events for a specific webhook send a POST request to the "webhooks/{webhook_id}/events" endpoint

params = {
    "type": "price.change",
    "product": {
        "sem3_id": "1QZC8wchX62eCYS2CACmka"
    },
    "constraints": {
        "gte": 10,
        "lte": 100
    }
}

webhook_id = '7JcGN81u'
endpoint = "webhooks/%s/events" % webhook_id

eventObject = sem3.run_query(endpoint,  "POST", params)
print eventObject["id"]
print eventObject["type"]
print eventObject["product"]

To fetch all registered events for a give webhook

webhook_id = '7JcGN81u'
endpoint = "webhooks/%s/events" % webhook_id

events = sem3.run_query(endpoint,  "GET")
print events

Webhook Notifications

Once you have created a webhook and registered events on it, notifications will be sent to your registered webhook URI via a POST request when the corresponding events occur. Make sure that your server can accept POST requests. Here is how a sample notification object looks like

{
    "type": "price.change",
    "event_id": "XyZgOZ5q",
    "notification_id": "X4jsdDsW",
    "changes": [{
        "site": "abc.com",
        "url": "http://www.abc.com/def",
        "previous_price": 45.50,
        "current_price": 41.00
    }, {
        "site": "walmart.com",
        "url": "http://www.walmart.com/ip/20671263",
        "previous_price": 34.00,
        "current_price": 42.00
    }]
}

Contributing

Use GitHub's standard fork/commit/pull-request cycle. If you have any questions, email [email protected].

Authors

• Shawn Tan

• Abishek Bhat [email protected]

Copyright

Copyright (c) 2015 Semantics3 Inc.

License

The "MIT" License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.