Python Programming Tutorials

Python Programming Tutorials And Articles
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Python supports a couple of looping constructs. The for statement is most commonly used. It loops over the elements of a sequence, assigning each to the loop variable. If the body of your loop is simple, the interpreter overhead of the for loop itself can be a substantial amount of the overhead....
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Python urllib2 library contains functions with enables programmers to access remote URLs by helping out in the operations like HTTP Basic Authentication, cookies, redirects etc. It's Python's equivalent to Perl's LWP or ASP's XMLHttpRequest etc. The library allows you to add HTTP headers to...
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My cousin recently bought a Bomb Trap puzzle, he was crazy for solving that puzzle and tried a couple of times and often came to me for rechecking his solution, and me being lazy, I thought of making a simple python script to check his solutions and save me from the brain drain. The Code ...
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Sudoku is a logic based number-placement puzzle, The objective of the puzzle is to fill a n * n grid with digits so that :- Each column of the square contains each of the numbers from 1 to n exactly once. Each row of the square contains each of the numbers from 1 to n exactly once. The...
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Link Extractor as the name suggests, scrapes all the URLs from a particular webpage. In the following code the extractor can extract relative as well as absolute URL's from a HTML webpage, and outputs them is a more readable and useful format. The Code from BeautifulSoup import...
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HMAC stands for Hash-base Message Authentication Code, it is key based message digest algorithm which can be used for verifying the integrity of the message (i.e. the original message from which the hash is generated) or to verify the authenticity of the sender of the message or both. Nowadays,...
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Amazon's Simple Queue Service is a highly scalable service to help cloud-based applications use a queuing system which is reliable & scalable. Amazon's queue has it's pros & cons, like the messages may not be received in the order they were queued, and you may receive duplicates, I had written an...
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Strings and Lists are 2 important data types in the suite of structured data types in python. Strings and lists are similar, but they are not same and many people donít know the main difference between a string and a list in python. One simple difference between strings and lists is that lists can...
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Introduction There are two basic methods for sending an email with Python. If a mail server is running on the machine where Python is installed, simply open a pipe to the mail server and write the email as a file to that pipe. This is usually done on *nix type systems such as Linux. ...
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Image manipulation is an interesting subject, as well almost inevitable in today's websites, you can use it to render CAPTCHA, crop & resize images, convert between image formats and many more advanced functions. Python with it's growing popularity has encouraged the community & enterprises to...
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CSV files are quite common these days owing to the fact that CSV files are simple text and make data transfer between different systems very easy. CSV stands for Comma Separated Values, i.e. the fields are separated by comma, so there exists similar formats where the separator is a different...
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In a previous article Access MySQL Databases in Python few months back, in that I had discussed using MySQLdb python module to access MySQL in Python scripts, though that being easy & good lacked many important features like placeholders/parameterization, lazy execute & fetch, buffering of large...
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SQLite is a very small RDBMS, unlike other popular RDBMS it does not have a client/server model, data is stored in a file. SQLite is very portable, and very popular for creating prototype systems before actual work is started. Here, we'll see how to access & modify SQLite database in Python. Python...
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CGI or Common Gateway Interface allow servers, primarily HTTP servers, to interface with external programs like Python, Perl, Ruby scripts or even binary programs written in C/C++. The most popular & most used web server - Apache - can easily be configured for CGI scripts. Let's look at...
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Post Office Protocal version 3 (POP3) is protocol of the TCP/IP stack's application layer, used to fetch email from remote mail servers. POP is one of the most used protocols for email retrieval, other one being IMAP. Virtually every email application, be it in the desktop or mobile supports the...
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Internet Message Access Protocol better known as IMAP is one of the most popular & widely used protocols for accessing emails from remote servers, the other one being POP (Post Office Protocol), and almost all modern email clients support both these protocols. IMAP works on TCP/IP stack, and...
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JSON has now become a extensively used data format, primarily used to exchange data between different systems, you may say that it is a successor of the XML format in this regard. From small to very large web applications use JSON, some still provide XML format as an option while others don't, a...
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Secure hashes, message digests, or simply digest as they are popularly known are specific algorithms which take data of any type and any size and return a fixed bit length data that'll always be the same for the arbitrary data provided, in case the data is modified the hash will change vastly. ...
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Amazon Simple Storage Service (S3) is a low-cost & high-availability storage service provided by Amazon Web Services. It's really popular, more so due to the recent switching of IT infrastructures to cloud-based solutions. You can know more about Amazon S3, it's pricing structure etc. at...
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Command line arguments are quite old, in the days of DOS they were generally just options enabling/disabling mechanism and were known as switches. But, after the growth of *nix systems command line arguments have been developed and have provided a lot of features to power users. Here's an...
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