How to Visualize Tanda Data in Python with pandas

The rich ecosystem of Python modules lets you get to work quickly and integrate your systems more effectively. With the CData API Driver for Python, the pandas & Matplotlib modules, and the SQLAlchemy toolkit, you can build Tanda-connected Python applications and scripts for visualizing Tanda data. This article shows how to use the pandas, SQLAlchemy, and Matplotlib built-in functions to connect to Tanda data, execute queries, and visualize the results.

With built-in optimized data processing, the CData Python Connector offers unmatched performance for interacting with live Tanda data in Python. When you issue complex SQL queries from Tanda, the driver pushes supported SQL operations, like filters and aggregations, directly to Tanda and utilizes the embedded SQL engine to process unsupported operations client-side (often SQL functions and JOIN operations).

Connecting to Tanda Data

Connecting to Tanda data looks just like connecting to any relational data source. Create a connection string using the required connection properties. For this article, you will pass the connection string as a parameter to the create_engine function.

Start by setting the Profile connection property to the location of the Tanda Profile on disk (e.g. C:\profiles\Tanda.apip). Next, set the ProfileSettings connection property to the connection string for Tanda (see below).

Tanda API Profile Settings

Register an OAuth application at the Tanda applications page by clicking New App and entering your app name and redirect URI.

Follow the procedure below to install the required modules and start accessing Tanda through Python objects.

Install Required Modules

Use the pip utility to install the pandas & Matplotlib modules and the SQLAlchemy toolkit:

pip install pandas
pip install matplotlib
pip install sqlalchemy

Be sure to import the module with the following:

import pandas
import matplotlib.pyplot as plt
from sqlalchemy import create_engine

Visualize Tanda Data in Python

You can now connect with a connection string. Use the create_engine function to create an Engine for working with Tanda data.

engine = create_engine("api:///?Profile=C:\profiles\Tanda.apip&Authscheme=OAuth&OAuthClientId=your_client_id&OAuthClientSecret=your_client_secret&CallbackUrl=your_callback_url")

Execute SQL to Tanda

Use the read_sql function from pandas to execute any SQL statement and store the resultset in a DataFrame.

df = pandas.read_sql("SELECT ShiftId, UserId FROM ActiveShifts WHERE Status = 'clocked_in'", engine)

Visualize Tanda Data

With the query results stored in a DataFrame, use the plot function to build a chart to display the Tanda data. The show method displays the chart in a new window.

df.plot(kind="bar", x="ShiftId", y="UserId")
plt.show()

Free Trial & More Information

Download a free, 30-day trial of the CData API Driver for Python to start building Python apps and scripts with connectivity to Tanda data. Reach out to our Support Team if you have any questions.

Full Source Code

import pandas
import matplotlib.pyplot as plt
from sqlalchemy import create_engin

engine = create_engine("api:///?Profile=C:\profiles\Tanda.apip&Authscheme=OAuth&OAuthClientId=your_client_id&OAuthClientSecret=your_client_secret&CallbackUrl=your_callback_url")
df = pandas.read_sql("SELECT ShiftId, UserId FROM ActiveShifts WHERE Status = 'clocked_in'", engine)

df.plot(kind="bar", x="ShiftId", y="UserId")
plt.show()