Popular recipes tagged "meta:requires=string"

[xtopdf] Publish Delimiter-Separated Values (DSV data) to PDF (Python)

2016-12-17T19:08:33-08:00

Python recipe 580736 by Vasudev Ram (commandline, csv, data, files, formats, pdf, pdf_generation, python, tsv, utilities, xtopdf).

This recipe shows how to publish delimiter-separated values (a commonly used tabular data format) to PDF, using the xtopdf toolkit for PDF creation. It lets the user specify the delimiter via one of two command-line options - an ASCII code or an ASCII character. As Unix filters tend to do, it can operate either on standard input or on input filenames given as command-line arguments. In the case of multiple inputs via files, each input goes to a separate PDF output file.

A simple text file pager in Python (Python)

2017-02-10T21:34:45-08:00

Python recipe 580755 by Vasudev Ram (command, commandline, pagination, paging, python, text, utilities, windows).

This recipe shows how to create a simple text file pager in Python. It allows you to view text content a page at a time (with a user-definable number of lines per page). Like standard Unix utilities, it can either take a text file name as a command-line argument, or can read the text from its standard input, which can be redirected to come from a file, or to come from a pipe. The recipe is for Windows only, though, since it uses the msvcrt.getch() function, which is Windows-specific. However, the recipe can be modified to work on Unix by using things like tty, curses, termios, cbreak, etc.

More details here:

https://jugad2.blogspot.in/2017/02/tp-simple-text-pager-in-python.html

Classifying characters using nested conditional expressions (Python)

2017-04-27T21:26:00-07:00

Python recipe 580792 by Vasudev Ram (characters, classification, conditional_expressions, expressions, join, lambda, map).

Python has a feature called conditional expressions, similar to C's ternary operator. For example:

print n, 'is odd' if n % 2 == 1 else 'is even'

Here, the conditional expression is this part of the print statement above:

'is odd' if n % 2 == 1 else 'is even'

This expression evaluates to 'is odd' if the condition after the if keyword is True, and evaluates to 'is even' otherwise.

The Python Language Reference section for conditional expressions shows that they can be nested. This recipe shows that we can use nested conditional expressions (within a return statement in a user-defined function) to classify characters into lowercase letters, uppercase letters, or neither.

It also shows how to do the same task using map, lambda and string.join, again with a nested conditional expression, but without using return or a user-defined function.

Classifying letters as vowels or consonants and counting their frequencies (Python)

2017-01-17T20:05:10-08:00

Python recipe 580749 by Vasudev Ram (assertions, comprehension, dict, dictionaries, dict_comp, python, python2, tuple, unpack).

This recipe shows how to take a string as input and classify the characters in it as vowels, consonants or neither. The frequency of each vowel is calculated and the frequency of all the consonants in total is calculated. The program logic is fairly simple, and uses a dictionary comprehension and a dict; the more interesting thing about it, is that it illustrates 8 Python language features in under 35 lines of code.

More details and sample output here:

https://jugad2.blogspot.in/2017/01/classifying-letters-and-counting-their.html

A command-line musical alarm clock (Python)

2016-12-30T19:06:32-08:00

Python recipe 580739 by Vasudev Ram (alarm, audio, clock, multimedia, music, playsound, python, time, utilities, utility).

This is a simple musical alarm clock in Python. You pass a command-line argument specifying the time in minutes after which the alarm should go off. When that time arrives, it plays a musical sound.

Process Delimiter-Separated Values data with Python (Python)

2016-11-24T23:57:35-08:00

Python recipe 580722 by Vasudev Ram (command, commandline, data, dsv, file, python, utilities, utility).

This recipe shows how to read and process delimiter-separated values (DSV) data with a Python command-line program. It provides two ways of specifying the delimiter character, by an ASCII character or an ASCII code, which makes it more flexible than allowing only a character. It allows the DSV data to be specified as one or more filenames on the command line, or given via the standard input of the program.

Publish a Windows Process List to PDF with xtopdf (Batch)

2015-12-27T20:45:32-08:00

Batch recipe 579142 by Vasudev Ram (pdf, pdfwriter, pdf_generation, processes, process_management, python, windows).

This recipe shows how you can generate a Windows process list or task list (basically, a list of running processes, with some information about each of them), to a PDF file, using the Windows TASKLIST command along with the xtopdf toolkit. The list is sorted in ascending order of memory usage of the processes, before writing it to PDF.

It differs somewhat from other xtopdf recipes, in that no additional code needs to be written, over and above what is already in the xtopdf package. We just have to use the needed commands there, in a series of commands or a pipeline.

However, one can still write additional code, by modifying the program used (StdinToPDF.py), if needed, to customize the PDF output.

The many uses of randomness - Part 2 (Python)

2016-07-17T17:26:47-07:00

Python recipe 580690 by Vasudev Ram (random, random_number, simulation, testing).

This is the second recipe in the series about the uses of randomness in Python. The first recipe is here:

https://code.activestate.com/recipes/580674-the-many-uses-of-randomness-part-1/?in=user-4173351

This second recipe shows some uses of random numbers to generate random characters and random strings of various categories, and some purposes for which these generated strings can be used in testing.

Simple command-line alarm clock in Python (Python)

2015-10-25T18:27:27-07:00

Python recipe 579117 by Vasudev Ram (alarm, clock, commandline, linux, python, time, unix, windows).

This recipe shows how to create a simple alarm clock in Python, that can be run from the command line in a terminal. It lets you specify the alarm time in minutes as a command line argument, and prints a wake-up message and beeps a few times, after that time arrives. You can use 0 for the minutes to test it immediately, including to adjust the volume using your speaker controls.

MicroXml: Stand-alone library for basic XML features (C++)

2016-02-18T19:33:07-08:00

C++ recipe 580612 by Jack Trainor (parsing, xml).

MicroXml provides stand-alone support for the basic, most-used features of XML -- tags, attributes, and element values. It produces a DOM tree of XML nodes. MicroXml does not support DTDs, CDATAs and other advanced XML features.

MicroXml is easy to use and provides easy access to view/navigate its nodes in a debugger.

Recognizing speech (speech-to-text) with the Python speech module (Python)

2015-10-22T13:09:02-07:00

Python recipe 579115 by Vasudev Ram (language_translation, python, python2, speech_recognition, windows).

This recipe shows how to use the 'speech' (or 'pyspeech' - it seems to have two names) Python library to make the computer recognize what you say and convert it to text. Note: This library did not always give correct results for me, so it may not be advisable to use it in production. Also, the pyspeech site says that the library is no longer being maintained. Use at your own risk.

Generate behave table (Python)

2015-05-19T07:16:06-07:00

Python recipe 579055 by Nicolas Laurance (bdd, behave, table).

When writing BDD code with behave, you may want to include a set of examples for scenario outline, or provide a table for setting up initial conditions. This snippet ease the pain of formatting the table properly as text

Generate Sphinx table (Python)

2015-05-19T07:02:20-07:00

Python recipe 579054 by Nicolas Laurance (rest, sphinx).

This function will take a list of tuples and transform it into a list of string representing the data as a ReST Sphinx table.

A Basic USe flag EDitor for Gentoo Linux supporting on-the-fly editing (Python)

2015-02-28T07:04:31-08:00

Python recipe 579028 by Mike 'Fuzzy' Partin (parsing, popen, subprocess, user_input).

This allows for on-the-fly editing. Simply drop abused.py into your path, and ensure that -a is not set in EMERGE_DEFAULT_OPTS in /etc/portage/make.conf. Then whenver you are installing new packages, use abused in place of emerge (eg: abused multitail) you will be presented with a list of use flags that are used in this action, and a prompt for editing any of them, simply hit enter with no changes to fire off the build.

Convert Wordpress Export File to multiple html files (Python)

2014-06-15T03:17:19-07:00

Python recipe 578892 by rreboto (xml).

Converts Wordpress Export Files (XML) to multiple html files and optionally uses tags and authors to create a directory structure.

Encode multipart form data for uploading files via POST (Python)

2013-09-22T21:27:24-07:00

Python recipe 578668 by Ben Hoyt (form, http, multipart, upload).

This function lets you encode form fields and files in multipart/form-data format for uploading files via HTTP POST.

The Bentley-Knuth problem and solutions (Python)

2014-03-15T23:46:59-07:00

Python recipe 578851 by Vasudev Ram (algorithms, python, text_processing).

This is a program Jon Bentley asked Donald Knuth to write, and is one that’s become familiar to people who use languages with serious text-handling capabilities: Read a file of text, determine the n most frequently used words, and print out a sorted list of those words along with their frequencies. I wrote 2 solutions for it earlier, in Python and in Unix shell. Also see the comment by a user on the post, giving another solution.

A Phone Book GUI Built in wxPython Connected To Database Using Data Grid View (Python)

2013-09-29T19:25:23-07:00

Python recipe 578676 by toufic zaarour (database, datagridview, graphical, gui, interface).

this GUI as simple as it is explains some basic but important graphical database interfacing; "Add", "Edit","Delete","Search" and few others along with a data grid view. in order to work create an sqlite3 database as follows:

data table : Phone, column 1 : ID, column 2 : name, column 3 : surname, column 4 : telephone.

save the sqlite3 file as file.db in a folder called Data and place it in the same directory as your python script.

if you want to create the sqlite3 database graphically use my previous post : http://code.activestate.com/recipes/578665-a-wxpython-gui-to-create-sqlite3-databases/

Also there is more: I did not use auto-number for 'id' because I also wanted to include in the code a renumbering script.

I am pleased to receive all the suggestions and improvements on this site or to my e-mail directly if this is convenient to you.

note: if you don't like the database table name, and columns name create your own but make sure to change them in the code as well! in the end life is great! remember that!

ascii2wide Translate printable non-whitespace ascii characters to wide characters (Python)

2013-06-20T20:23:09-07:00

Python recipe 578577 by Gary Eakins (ascii, translate, wide).

Translates ascii characters to wide characters.

Password Generator (mkpasswd) (Python)

2013-07-31T23:23:02-07:00

Python recipe 578468 by James Mills (generator, mkpasswd, password, secure). Revision 3.

Since everyone is posting one of these, I thought I'd post mine. I wrote this many years ago and use it everywhere.