Python database interfaces

Dec 18, 2012Download as pptx, pdf

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This document provides an overview of Python database interfaces and APIs for connecting to relational and non-relational databases. It discusses popular database drivers like pyodbc, MySQLdb, and psycopg, which provide interfaces to SQL databases like SQL Server, MySQL, Oracle, and PostgreSQL. It also mentions ORM frameworks like Django that provide higher-level database access.

Database interfaces
beheshtraya@gmail.com

Generic Database Interfaces
and APIs
• ODBC Support
o pyodbc
o mxODBC

• ADO Support
o adodbapi

• JDBC Support
o Integrated in Jython

Python database interfaces Fall 2012

pyodbc
• Connect to a Database
Make a direct connection to a database and
create a cursor.

import pyodbc
cnxn = pyodbc.connect('DRIVER={SQL Server};
SERVER=localhost;
DATABASE=testdb;
UID=user;
PWD=pass')
cursor = cnxn.cursor()

Python database interfaces Fall 2012

pyodbc
• Selecting Some Data
Execute query then fetch results.

cursor.execute("select user_id, user_name from users")
row = cursor.fetchone()
print 'name:', row[1] # access by column index
print 'name:', row.user_name # or access by name

cursor.execute("select user_id, user_name from users")
rows = cursor.fetchall()
for row in rows:
print row.user_id, row.user_name

Python database interfaces Fall 2012

pyodbc
• Inserting or deleting
Execute query then commit changes.

cursor.execute("insert into products(id, name) values ('pyodbc',
'awesome')")
cnxn.commit()

deleted = cursor.execute("delete from products where id <> 'pyodbc'").r
cnxn.commit()

Python database interfaces Fall 2012

Interfaces for Relational
Database Systems

• General Purpose Database Systems

• Database Systems for Embedding Into
Applications

Python database interfaces Fall 2012

General Purpose Database
Systems
• Microsoft SQL Server
• Oracle
• MySQL
• IBM DB2
• PostgreSQL
• Firebird (and Interbase)
• Informix
• SAP DB (also known as "MaxDB")
• …

Python database interfaces Fall 2012

• mssql
o MS SQL Server module for Python

• pymssql
o A fast MS SQL server client library for Python directly using C API
instead of ODBC.

Python database interfaces Fall 2012

• cx_Oracle
o Lite Oracle DB Server module for Python

• DCOracle2
o Advanced Python DB API 2.0 adapter for Oracle from
Zope company.

Python database interfaces Fall 2012

• MySQLdb
o The most famous library for connecting MySQL
in python.

• PyMySQL
o Pure-Python MySQL client library.

Python database interfaces Fall 2012

MySQLdb
• Benefits:
o Very fast and optimized ( written in C)
o Has big community
o Defense SQL injection
o very efficient

import MySQLdb
conn = mysql.connect(‘localhost’, ‘username’, ‘password’, ‘db name’)
cursor = conn.cursor()
cursor.execute(‚Example query‛)
cursor.commit() #needed for insert and delete

Python database interfaces Fall 2012

• Ibm_db
o Python support for IBM DB2 and IBM Informix

• PyDB2
o Pure-Python DB2 interface library.

Python database interfaces Fall 2012

• Psycopg
o The most popular PostgreSQL adapter for the Python

• PyGreSQL
o Open-source Python module that interfaces to
a PostgreSQL database

Python database interfaces Fall 2012

Interfaces for Non-Relational
Database Systems

• MetaKit
• ZODB
• Berkeley DB
• Durus
• Atop

Python database interfaces Fall 2012

Native Python Databases
• Buzhug
o buzhug is a fast, portable, pure-Python database engine, using a
pythonic non-SQL syntax for all operations.

• SnakeSQL
o SnakeSQL is a pure Python SQL database written to remove
the dependence of the Python Web Modules on 3rd party
drivers for non-Python databases.

Python database interfaces Fall 2012

Django is a high-level Python Web
framework that encourages rapid
development and clean, pragmatic
design.

Python database interfaces Fall 2012

$Set database server DATABASES = { 'default': { 'ENGINE': 'django.db.backends.’ # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'. 'NAME': 'main_db.db', # Or path to database file if using sqlite3. 'USER': '', 'PASSWORD': '', 'HOST': '', # Set to empty string for localhost. 'PORT': '', # Set to empty string for default. } } Python database interfaces Fall 2012$

$Using multiple database • DATABASES = { 'default': { 'NAME': 'app_data', 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'USER': 'postgres_user', 'PASSWORD': 's3krit' }, 'users': { 'NAME': 'user_data', 'ENGINE': 'django.db.backends.mysql', 'USER': 'mysql_user', 'PASSWORD': 'priv4te' } } Python database interfaces Fall 2012$

Resources

• Expert Python
Programming

Python database interfaces Fall 2012

Resources

• wiki.python.org

• www.djangoproject.com

Python database interfaces Fall 2012

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Rice pests can significantly impact crop yield and quality. Major pests include the brown plant hopper (Nilaparvata lugens), which transmits viruses like rice ragged stunt and grassy stunt; the yellow stem borer (Scirpophaga incertulas), whose larvae bore into stems causing deadhearts and whiteheads; and leaf folders (Cnaphalocrocis medinalis), which feed on leaves reducing photosynthetic area. Other pests include rice weevils (Sitophilus oryzae) and gall midges (Orseolia oryzae). Effective management strategies are crucial to minimize losses.

Hemiptera & Neuroptera: Insect Diversity.pptxArshad Shaikh

*Order Hemiptera:* Hemiptera, commonly known as true bugs, is a large and diverse order of insects that includes cicadas, aphids, leafhoppers, and shield bugs. Characterized by their piercing-sucking mouthparts, Hemiptera feed on plant sap, other insects, or small animals. Many species are significant pests, while others are beneficial predators. *Order Neuroptera:* Neuroptera, also known as net-winged insects, is an order of insects that includes lacewings, antlions, and owlflies. Characterized by their delicate, net-like wing venation and large, often prominent eyes, Neuroptera are predators that feed on other insects, playing an important role in biological control. Many species have aquatic larvae, adding to their ecological diversity.

Optimization technique in pharmaceutical product development.pptxUrmiPrajapati3

How to Create a Stage or a Pipeline in Odoo 18 CRMCeline George

Rai dyansty Chach or Brahamn dynasty, History of Dahir History of Sindh NEP.pptxDr. Ravi Shankar Arya Mahila P. G. College, Banaras Hindu University, Varanasi, India.

This presentation has been made keeping in mind the students of undergraduate and postgraduate level. To keep the facts in a natural form and to display the material in more detail, the help of various books, websites and online medium has been taken. Whatever medium the material or facts have been taken from, an attempt has been made by the presenter to give their reference at the end. In the seventh century, the rule of Sindh state was in the hands of Rai dynasty. We know the names of five kings of this dynasty- Rai Divji, Rai Singhras, Rai Sahasi, Rai Sihras II and Rai Sahasi II. During the time of Rai Sihras II, Nimruz of Persia attacked Sindh and killed him. After the return of the Persians, Rai Sahasi II became the king. After killing him, one of his Brahmin ministers named Chach took over the throne. He married the widow of Rai Sahasi and became the ruler of entire Sindh by suppressing the rebellions of the governors.

How to Create Quotation Templates Sequence in Odoo 18 SalesCeline George

Black and White Illustrative Group Project Presentation.pdf (1).pdfAnnasofiaUrsini

Diptera: The Two-Winged Wonders, The Fly Squad: Order Diptera.pptxArshad Shaikh

Diptera, commonly known as flies, is a large and diverse order of insects that includes mosquitoes, midges, gnats, and horseflies. Characterized by a single pair of wings (hindwings are modified into balancing organs called halteres), Diptera are found in almost every environment and play important roles in ecosystems as pollinators, decomposers, and food sources. Some species, however, are significant pests and disease vectors, transmitting diseases like malaria, dengue, and Zika virus.

Parenting Teens: Supporting Trust, resilience and independencePooky Knightsmith

For more information about my speaking and training work, visit: https://www.pookyknightsmith.com/speaking/ SESSION OVERVIEW: Parenting Teens: Supporting Trust, Resilience & Independence The teenage years bring new challenges—for teens and for you. In this practical session, we’ll explore how to support your teen through emotional ups and downs, growing independence, and the pressures of school and social life. You’ll gain insights into the teenage brain and why boundary-pushing is part of healthy development, along with tools to keep communication open, build trust, and support emotional resilience. Expect honest ideas, relatable examples, and space to connect with other parents. By the end of this session, you will: • Understand how teenage brain development affects behaviour and emotions • Learn ways to keep communication open and supportive • Explore tools to help your teen manage stress and bounce back from setbacks • Reflect on how to encourage independence while staying connected • Discover simple strategies to support emotional wellbeing • Share experiences and ideas with other parents

TV Shows and web-series quiz | QUIZ CLUB OF PSGCAS | 13TH MARCH 2025Quiz Club of PSG College of Arts & Science

MATERI PPT TOPIK 1 LANDASAN FILOSOFIS PENDIDIKANaditya23173

LDMMIA Free Reiki Yoga S9 Grad Level Intuition IILDM & Mia eStudios

Completed Sunday 6/8. For Weekend 6/14 & 15th. (Fathers Day Weekend US.) These workshops are also timeless for future students TY. No admissions needed. A 9th FREE WORKSHOP Reiki - Yoga “Intuition-II, The Chakras” Your Attendance is valued. We hit over 5k views for Spring Workshops and Updates-TY. Thank you for attending our workshops. If you are new, do welcome. Grad Students: I am planning a Reiki-Yoga Master Course (As a package). I’m Fusing both together. This will include the foundation of each practice. Our Free Workshops can be used with any Reiki Yoga training package. Traditional Reiki does host rules and ethics. Its silent and within the JP Culture/Area/Training/Word of Mouth. It allows remote healing but there’s limits As practitioners and masters, we are not allowed to share certain secrets/tools. Some content is designed only for “Masters”. Some yoga are similar like the Kriya Yoga-Church (Vowed Lessons). We will review both Reiki and Yoga (Master tools) in the Course upcoming. S9/This Week’s Focus: * A continuation of Intuition-2 Development. We will review the Chakra System - Our temple. A misguided, misused situation lol. This will also serve Attunement later. Thx for tuning in. Your time investment is valued. I do select topics related to our timeline and community. For those seeking upgrades or Reiki Levels. Stay tuned for our June packages. It’s for self employed/Practitioners/Coaches… Review & Topics: * Reiki Is Japanese Energy Healing used Globally. * Yoga is over 5k years old from India. It hosts many styles, teacher versions, and it’s Mainstream now vs decades ago. * Anything of the Holistic, Wellness Department can be fused together. My origins are Alternative, Complementary Medicine. In short, I call this ND. I am also a metaphysician. I learnt during the 90s New Age Era. I forget we just hit another wavy. It’s GenZ word of Mouth, their New Age Era. WHOA, History Repeats lol. We are fusing together. * So, most of you have experienced your Spiritual Awakening. However; The journey wont be perfect. There will be some roller coaster events. The perks are: We are in a faster Spiritual Zone than the 90s. There’s more support and information available. (See Presentation for all sections, THX AGAIN.)

june 10 2025 ppt for madden on art science is over.pptxroger malina

Search Engine Optimization (SEO) for Website SuccessMuneeb Rana

Unlock the essentials of Search Engine Optimization (SEO) with this concise, visually driven PowerPoint. Inside you’ll find: ✅ Clear definitions and core concepts of SEO ✅ A breakdown of On‑Page, Off‑Page, and Technical SEO ✅ Actionable best‑practice checklists for keyword research, content optimization, and link building ✅ A quick‑start toolkit featuring Google Analytics, Search Console, Ahrefs, SEMrush, and Moz ✅ Real‑world case study demonstrating a 70 % organic‑traffic lift ✅ Common challenges, algorithm updates, and tips for long‑term success Whether you’re a digital‑marketing student, small‑business owner, or PR professional, this deck will help you boost visibility, build credibility, and drive sustainable traffic. Download, share, and start optimizing today!

Forestry Model Exit Exam_2025_Wollega University, Gimbi Campus.pdfChalaKelbessa

This is Forestry Exit Exam Model for 2025 from Department of Forestry at Wollega University, Gimbi Campus. The exam contains forestry courses such as Dendrology, Forest Seed and Nursery Establishment, Plantation Establishment and Management, Silviculture, Forest Mensuration, Forest Biometry, Agroforestry, Biodiversity Conservation, Forest Business, Forest Fore, Forest Protection, Forest Management, Wood Processing and others that are related to Forestry.

How to Create a Rainbow Man Effect in Odoo 18Celine George

POS Reporting in Odoo 18 - Odoo 18 SlidesCeline George

Coleoptera: The Largest Insect Order.pptxArshad Shaikh

Coleoptera, commonly known as beetles, is the largest order of insects, comprising approximately 400,000 described species. Beetles can be found in almost every habitat on Earth, exhibiting a wide range of morphological, behavioral, and ecological diversity. They have a hardened exoskeleton, with the forewings modified into elytra that protect the hind wings. Beetles play important roles in ecosystems as decomposers, pollinators, and food sources for other animals, while some species are considered pests in agriculture and forestry.

LDMMIA Reiki Yoga Next Week Grad UpdatesLDM & Mia eStudios

A short update and next week. I am writing both Session 9 and Orientation S1. As a Guest Student, You are now upgraded to Grad Level. See Uploads for “Student Checkin” & “S8”. Thx. Thank you for attending our workshops. If you are new, do welcome. Grad Students: I am planning a Reiki-Yoga Master Course (As a package). I’m Fusing both together. This will include the foundation of each practice. Our Free Workshops can be used with any Reiki Yoga training package. Traditional Reiki does host rules and ethics. Its silent and within the JP Culture/Area/Training/Word of Mouth. It allows remote healing but there’s limits As practitioners and masters. We are not allowed to share certain secrets/tools. Some content is designed only for “Masters”. Some yoga are similar like the Kriya Yoga-Church (Vowed Lessons). We will review both Reiki and Yoga (Master tools) in the Course upcoming. Session Practice, For Reference: Before starting a session, Make sure to check your environment. Nothing stressful. Later, You can decorate a space as well. Check the comfort level, any needed resources (Yoga/Reiki/Spa Props), or Meditation Asst? Props can be oils, sage, incense, candles, crystals, pillows, blankets, yoga mat, any theme applies. Select your comfort Pose. This can be standing, sitting, laying down, or a combination. Monitor your breath. You can add exercises. Add any mantras or affirmations. This does aid mind and spirit. It helps you to focus. Also you can set intentions using a candle. The Yoga-key is balancing mind, body, and spirit. Finally, The Duration can be long or short. Its a good session base for any style. Next Week’s Focus: A continuation of Intuition Development. We will review the Chakra System - Our temple. A misguided, misused situation lol. This will also serve Attunement later. For Sponsor, General updates, & Donations: Please visit: https://ldmchapels.weebly.com

MATERI PPT TOPIK 4 LANDASAN FILOSOFIS PENDIDIKANaditya23173

Pests of Rice: Damage, Identification, Life history, and Management.pptxArshad Shaikh

Hemiptera & Neuroptera: Insect Diversity.pptxArshad Shaikh

Optimization technique in pharmaceutical product development.pptxUrmiPrajapati3

How to Create a Stage or a Pipeline in Odoo 18 CRMCeline George

Rai dyansty Chach or Brahamn dynasty, History of Dahir History of Sindh NEP.pptxDr. Ravi Shankar Arya Mahila P. G. College, Banaras Hindu University, Varanasi, India.

How to Create Quotation Templates Sequence in Odoo 18 SalesCeline George

Black and White Illustrative Group Project Presentation.pdf (1).pdfAnnasofiaUrsini

Diptera: The Two-Winged Wonders, The Fly Squad: Order Diptera.pptxArshad Shaikh

Parenting Teens: Supporting Trust, resilience and independencePooky Knightsmith

TV Shows and web-series quiz | QUIZ CLUB OF PSGCAS | 13TH MARCH 2025Quiz Club of PSG College of Arts & Science

MATERI PPT TOPIK 1 LANDASAN FILOSOFIS PENDIDIKANaditya23173

LDMMIA Free Reiki Yoga S9 Grad Level Intuition IILDM & Mia eStudios

june 10 2025 ppt for madden on art science is over.pptxroger malina

Search Engine Optimization (SEO) for Website SuccessMuneeb Rana

Forestry Model Exit Exam_2025_Wollega University, Gimbi Campus.pdfChalaKelbessa

How to Create a Rainbow Man Effect in Odoo 18Celine George

POS Reporting in Odoo 18 - Odoo 18 SlidesCeline George

Coleoptera: The Largest Insect Order.pptxArshad Shaikh

LDMMIA Reiki Yoga Next Week Grad UpdatesLDM & Mia eStudios

Python database interfaces

1. Database interfaces [email protected]

2. Generic Database Interfaces and APIs • ODBC Support o pyodbc o mxODBC • ADO Support o adodbapi • JDBC Support o Integrated in Jython Python database interfaces Fall 2012

3. pyodbc • Connect to a Database Make a direct connection to a database and create a cursor. import pyodbc cnxn = pyodbc.connect('DRIVER={SQL Server}; SERVER=localhost; DATABASE=testdb; UID=user; PWD=pass') cursor = cnxn.cursor() Python database interfaces Fall 2012

4. pyodbc • Selecting Some Data Execute query then fetch results. cursor.execute("select user_id, user_name from users") row = cursor.fetchone() print 'name:', row[1] # access by column index print 'name:', row.user_name # or access by name cursor.execute("select user_id, user_name from users") rows = cursor.fetchall() for row in rows: print row.user_id, row.user_name Python database interfaces Fall 2012

5. pyodbc • Inserting or deleting Execute query then commit changes. cursor.execute("insert into products(id, name) values ('pyodbc', 'awesome')") cnxn.commit() deleted = cursor.execute("delete from products where id <> 'pyodbc'").r cnxn.commit() Python database interfaces Fall 2012

6. Interfaces for Relational Database Systems • General Purpose Database Systems • Database Systems for Embedding Into Applications Python database interfaces Fall 2012

7. General Purpose Database Systems • Microsoft SQL Server • Oracle • MySQL • IBM DB2 • PostgreSQL • Firebird (and Interbase) • Informix • SAP DB (also known as "MaxDB") • … Python database interfaces Fall 2012

8. • mssql o MS SQL Server module for Python • pymssql o A fast MS SQL server client library for Python directly using C API instead of ODBC. Python database interfaces Fall 2012

9. • cx_Oracle o Lite Oracle DB Server module for Python • DCOracle2 o Advanced Python DB API 2.0 adapter for Oracle from Zope company. Python database interfaces Fall 2012

10. • MySQLdb o The most famous library for connecting MySQL in python. • PyMySQL o Pure-Python MySQL client library. Python database interfaces Fall 2012

11. MySQLdb • Benefits: o Very fast and optimized ( written in C) o Has big community o Defense SQL injection o very efficient import MySQLdb conn = mysql.connect(‘localhost’, ‘username’, ‘password’, ‘db name’) cursor = conn.cursor() cursor.execute(‚Example query‛) cursor.commit() #needed for insert and delete Python database interfaces Fall 2012

12. • Ibm_db o Python support for IBM DB2 and IBM Informix • PyDB2 o Pure-Python DB2 interface library. Python database interfaces Fall 2012

13. • Psycopg o The most popular PostgreSQL adapter for the Python • PyGreSQL o Open-source Python module that interfaces to a PostgreSQL database Python database interfaces Fall 2012

14. Interfaces for Non-Relational Database Systems • MetaKit • ZODB • Berkeley DB • Durus • Atop Python database interfaces Fall 2012

15. Native Python Databases • Buzhug o buzhug is a fast, portable, pure-Python database engine, using a pythonic non-SQL syntax for all operations. • SnakeSQL o SnakeSQL is a pure Python SQL database written to remove the dependence of the Python Web Modules on 3rd party drivers for non-Python databases. Python database interfaces Fall 2012

16. Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Python database interfaces Fall 2012

17. Set database server DATABASES = { 'default': { 'ENGINE': 'django.db.backends.’ # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'. 'NAME': 'main_db.db', # Or path to database file if using sqlite3. 'USER': '', 'PASSWORD': '', 'HOST': '', # Set to empty string for localhost. 'PORT': '', # Set to empty string for default. } } Python database interfaces Fall 2012

18. Using multiple database • DATABASES = { 'default': { 'NAME': 'app_data', 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'USER': 'postgres_user', 'PASSWORD': 's3krit' }, 'users': { 'NAME': 'user_data', 'ENGINE': 'django.db.backends.mysql', 'USER': 'mysql_user', 'PASSWORD': 'priv4te' } } Python database interfaces Fall 2012

19. Resources • Expert Python Programming Python database interfaces Fall 2012

20. Resources • wiki.python.org • www.djangoproject.com Python database interfaces Fall 2012

21. Python database interfaces Fall 2012

Python database interfaces

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