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Tools for working with an Oracle database from Pandas

Project description

This package includes methods for:

  1. Running a specified query, passed in as a string, on an Oracle database and returning the result to a Pandas data frame.
  2. Executing a command with no return data.
  3. Inserting the contents of a Pandas data frame into an Oracle database table.

Installation

pip install pandas_oracle

Overview

Sample usage:

import pandas_oracle.tools as pt

query1 = "select id, name from students where name like '%Oscar%'"
query2 = "select class, avg(age) from students group by class"

## opening conn
conn = pt.open_connection("config.yml")

## passing the conn object to the query_to_df
df1 = pt.query_to_df(query, conn, 10000)

## passing the conn object to the query_to_df , without to open again
df2 = pt.query_to_df(query2, conn, 10)

## close connection
pt.close_connection(conn)

Returns:

          ID                NAME
0    3298272         Meyer,Oscar
1    2304928         Wilde,Oscar
2    7654321        Grouch,Oscar
.        ...                 ...
128  2234879    De La Hoya,Oscar
129  9872322      Peterson,Oscar
130  9082394       Sanchez,Oscar

[131 rows x 2 columns]

Sample config file:

database:
    username: "OGROUCH"
    password: "SECR3TPASSWORD"
    sysdba: "n"
    host: >
            (DESCRIPTION =
                    (ADDRESS = (PROTOCOL = TCP)
                               (HOST = servername.myschool.edu)
                               (PORT = 1521)
                    )
                    (CONNECT_DATA = (SERVER = DEDICATED)
                                    (SID = dbname)
                    )
            )

If you don’t wish to store your password in the configuration file, you can omit that line. If a password isn’t present in the configuration file, you will be prompted for it at runtime.

You can choose whether or not to connect with the SYSDBA role. If the yaml file doesn’t include the “sysdba” property, it will connect like a normal user.

As of version 2.1.0, the _cc methods have been added (query_to_df_cc, execute_cc, and insert_multiple_cc). These methods get passed a config file rather than a connection object and take care of opening and closing the connection for you.

Project details


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