Linguaggio di Programmazione Python Using python to write mysql query to csv, need to show field names 11.13. sqlite3 — DB-API 2.0 interface for SQLite databases — Python 2.7.9 documentation SQLite is a C library that provides a lightweight disk-based database that doesn’t require a separate server process and allows accessing the database using a nonstandard variant of the SQL query language. Some applications can use SQLite for internal data storage. It’s also possible to prototype an application using SQLite and then port the code to a larger database such as PostgreSQL or Oracle. The sqlite3 module was written by Gerhard Häring. To use the module, you must first create a Connection object that represents the database. import sqlite3conn = sqlite3.connect('example.db') You can also supply the special name :memory: to create a database in RAM. Once you have a Connection, you can create a Cursor object and call its execute() method to perform SQL commands: The data you’ve saved is persistent and is available in subsequent sessions: import sqlite3conn = sqlite3.connect('example.db')c = conn.cursor() Usually your SQL operations will need to use values from Python variables. Note
Joomla - notas para crear un sitio web Core Python Cheat Sheet from DZone Refcardz by: Naomi Ceder and Mike Driscoll Python is an interpreted dynamically typed Language. Python uses indentation to create readable, even beautiful, code. Python comes with so many libraries that you can handle many jobs with no further libraries. Python fits in your head and tries not to surprise you, which means you can write useful code almost immediately. Python was created in 1990 by Guido van Rossum. Python 2.x vs. Python comes in two basic flavors these days – Python 2.x (currently 2.7) and Python 3.x (currently 3.3). There is a utility called 2to3.py that you can use to convert Python 2.x code to 3.x, while the '-3' command line switch in 2.x enables additional deprecation warnings for cases the automated converter cannot handle. Language Features Programming as Guido intended it... Indentation rules in Python. Comments and docstrings To mark a comment from the current location to the end of the line, use a pound sign, '#'. #! Branching, Looping, and Exceptions Branching Loops Functions
24.1. Tkinter — Python interface to Tcl/Tk — Python v2.7.3 documentation The Tkinter module (“Tk interface”) is the standard Python interface to the Tk GUI toolkit. Both Tk and Tkinter are available on most Unix platforms, as well as on Windows systems. (Tk itself is not part of Python; it is maintained at ActiveState.) 24.1.1. Tkinter Modules Most of the time, the Tkinter module is all you really need, but a number of additional modules are available as well. In addition to the Tk interface module, Tkinter includes a number of Python modules. Or, more often: class Tkinter.Tk(screenName=None, baseName=None, className='Tk', useTk=1) The Tk class is instantiated without arguments. Changed in version 2.4: The useTk parameter was added. Tkinter.Tcl(screenName=None, baseName=None, className='Tk', useTk=0) The Tcl() function is a factory function which creates an object much like that created by the Tk class, except that it does not initialize the Tk subsystem. New in version 2.4. Other modules that provide Tk support include: ScrolledText tkColorChooser tkCommonDialog fill
A quick guide to using MySQL in Python - Ian Howson Need to access some MySQL databases in Python right now? As in now, really, I don’t have time to read stuff, and please stop rambling because you’re wasting my time now? Read on! Getting started Access to MySQL databases is through the MySQLdb module. Your first step in any Python code is: import MySQLdb Python database access modules all have similar interfaces, described by the Python DB-API. Create the connection with: db = MySQLdb.connect(host="localhost", port=3306, user="foo", passwd="bar", db="qoz") substituting appropriate local values for each argument. db is now a handle to the database. cursor = db.cursor() MySQL doesn’t really support cursors in any sense that’s useful to us here, but the DB-API requires that you interface to them that way. Queries To execute queries: cursor.execute("SELECT name, phone_number FROM coworkers WHERE name=%s AND clue > %s LIMIT 5", (name, clue_threshold)) String interpolation is a bit different here. if you want to get fancy about it. ['Bob', '9123 4567']
Query Language: INSERT Small. Fast. Reliable.Choose any three. [Top] insert-stmt: expr: literal-value: raise-function: type-name: signed-number: select-stmt: common-table-expression: compound-operator: join-clause: join-constraint: join-operator: ordering-term: result-column: table-or-subquery: with-clause: cte-table-name: The INSERT statement comes in three basic forms. The first form (with the "VALUES" keyword) creates one or more new rows in an existing table. The optional conflict-clause allows the specification of an alternative constraint conflict resolution algorithm to use during this one INSERT command. The optional "database-name." prefix on the table-name is support for top-level INSERT statements only.
xampp for windows XAMPP for Windows 5.6.32, 7.0.25 & 7.1.11 Includes: Apache 2.4.29, MariaDB 10.1.28, PHP 5.6.32, phpMyAdmin 4.7.4, OpenSSL 1.0.2, XAMPP Control Panel 3.2.2, Webalizer 2.23-04, Mercury Mail Transport System 4.63, FileZilla FTP Server 0.9.41, Tomcat 7.0.56 (with mod_proxy_ajp as connector), Strawberry Perl 7.0.56 Portable Includes: Apache 2.4.29, MariaDB 10.1.28, PHP 7.0.25, phpMyAdmin 4.7.4, OpenSSL 1.0.2, XAMPP Control Panel 3.2.2, Webalizer 2.23-04, Mercury Mail Transport System 4.63, FileZilla FTP Server 0.9.41, Tomcat 7.0.56 (with mod_proxy_ajp as connector), Strawberry Perl 7.0.56 Portable Includes: Apache 2.4.29, MariaDB 10.1.28, PHP 7.1.11, phpMyAdmin 4.7.4, OpenSSL 1.0.2, XAMPP Control Panel 3.2.2, Webalizer 2.23-04, Mercury Mail Transport System 4.63, FileZilla FTP Server 0.9.41, Tomcat 7.0.56 (with mod_proxy_ajp as connector), Strawberry Perl 7.0.56 Portable Windows 2008, 2012, Vista, 7, 8 (Important: XP or 2003 not supported) Windows XP or 2003 are not supported.
Able Pear Software: Bundling Python files into a stand-alone executable One of the problems with building a medium to large sized program in Python (or similar scripting languages) is distributing it to users. When a Python script grows beyond a couple hundred lines, most programmers prefer to split that single script file into multiple Python modules and packages. For an individual developer, modules and packages are primarily an aid in mental organization, though they also ease navigating around the project. For a large Python program being developed by a team, modules and packages are an important way to communicate the structure and intent of the code. Unfortunately, distributing a multi-module Python program has a number of problems. Python has long included the distutils module to help developers distribute Python code. Today even the computer in your pocket has dozens of gigabytes of storage so modern development has moved away from sharing library code between programs. $ mkdir app Now let's run this program. $ python app $ cd app $ zip -r .. $ .
sebsauvage.net- Snyppets - Python snippets pt This page contains a bunch of miscellaneous Python code snippets, recipes, mini-guides, links, examples, tutorials and ideas, ranging from very (very) basic things to advanced. I hope they will be usefull to you. Note that scripts that do some web-scraping may not work anymore due to website changes. (Don't forget to read my main Python page ( ): there is handful of other programs and a guides.) Advertising To avoid dodgy websites,install WOT Send a file using FTP Piece of cake. import ftplib # We import the FTP module session = ftplib.FTP('myserver.com','login','passord') # Connect to the FTP server myfile = open('toto.txt','rb') # Open the file to send session.storbinary('STOR toto.txt', myfile) # Send the file myfile.close() # Close the file session.quit() # Close FTP session Queues (FIFO) and stacks (LIFO) Python makes using queues and stacks a piece of cake (Did I already say "piece of cake" ?). A function which returns several values Still hungry ? py2exe #!
Python MySQL Documentation Author Daniel Mikusa - dan at mikusa dot com License Creative Commons - More License Info History I wrote this documentation to try and help future people work with the MySQLdb module for Python. When I started working with this module I had a tough time finding up-to-date and complete documentation for the module. This documentation is a compilation of knowledge from various articles on MySQLdb, my personal experiences with using MySQLdb, and (of course) the actual MySQLdb source code. Basic Guide Introduction Making a Connection Getting a Cursor Executing Queries Obtaining Results Exceptions Cleaning Up Reference Guide Version 1.2.1_p2 Additional Resources
SQL INSERT INTO Statement