Programming Articles - Page 2821 of 3366

Encode and decode binhex4 files using Python (binhex)

Nishtha Thakur
Updated on 30-Jul-2019 22:30:25

617 Views

The binhex module encodes and decodes files in binhex4 format. This format is used in the representation of Macintosh files in ASCII. Only the data fork is handled.The binhex module defines the following functions −binhex.binhex(input, output): Convert a binary file with filename input to binhex file output. The output parameter can either be a filename or a file-like object (any object supporting a write() and close() method).binhex.hexbin(input, output): Decode a binhex file input. input may be a filename or a file-like object supporting read() and close() methods. The resulting file is written to a file named output unless the argument is None ... Read More

Python Context Variables

Smita Kapse
Updated on 30-Jul-2019 22:30:25

1K+ Views

Context variable can have different values depending on its context. Unlike Thread-Local Storage where each execution thread may have a different value for a variable, a context variable may be several contexts in one execution thread. This is useful in keeping track of variables in concurrent asynchronous tasks.The ContextVar class is used to declare and work with Context Variables.import contextvars name = contextvars.ContextVar("name", default = 'Hello')The optional default parameter is returned by ContextVar.get() when no value for the variable is found in the current context.name: The name of the variable. This is a read-only property.Following methods are defined in ContextVar ... Read More

Python Interfaces to Unix databases (dbm)

Anvi Jain
Updated on 30-Jul-2019 22:30:25

282 Views

The dbm package in Python's built-in library provides a dictionary like an interface DBM style databases. The dbm library is a simple database engine, written by Ken Thompson. DBM stands for DataBase Manager, used by UNIX operating system, the library stores arbitrary data by use of a single key (a primary key) in fixed-size buckets and uses hashing techniques to enable fast retrieval of the data by key.There are following modules in dbm package −The dbm.ndbm module provides an interface to the Unix “(n)dbm” library. Dbm objects behave like dictionaries, with keys and values should be stored as bytes. The ... Read More

Generate and parse Mac OS X .plist files using Python (plistlib)

Smita Kapse
Updated on 30-Jul-2019 22:30:25

2K+ Views

Files with '.plist' the extension is used by Mac OS X applications to store application properties. The plislib module provides an interface to read/write operations of these property list files.The plist file format serializes basic object types, like dictionaries, lists, numbers, and strings. Usually, the top level object is a dictionary. To write out and to parse a plist file, use the dump() and load() functions. Serialized byte strings are handled by use dumps() and loads() functions. Values can be strings, integers, floats, booleans, tuples, lists, dictionaries (but only with string keys).This module defines the following functions −load()Read a plist ... Read More

JavaTuples addAtX() method for Septet class

Samual Sam
Updated on 30-Jul-2019 22:30:25

100 Views

The addAtX() method is used to add value to the Septet Tuple. The index can be set here with the X i.e. the place where the value gets added.Let us first see what we need to work with JavaTuples. To work with Septet class in JavaTuples, you need to import the following package −import org.javatuples.Septet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Septet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example ... Read More

JavaTuples setAt0() method for Septet class

karthikeya Boyini
Updated on 30-Jul-2019 22:30:25

104 Views

The setAt0() method is used to set the Septet value in JavaTuples and a copy with new value at the specified index i.e. index 0 here.Let us first see what we need to work with JavaTuples. To work with Septet class in JavaTuples, you need to import the following package −import org.javatuples.Septet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Septet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Septet; import ... Read More

Create Septet Tuple from Array in Java

Samual Sam
Updated on 30-Jul-2019 22:30:25

132 Views

Let us first see what we need to work with JavaTuples. To work with Septet class in JavaTuples, you need to import the following package −import org.javatuples.Septet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Septet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Septet; public class Demo { public static void main(String[] args) { String[] myArr = { ... Read More

Create Septet Tuple from List in Java

karthikeya Boyini
Updated on 30-Jul-2019 22:30:25

113 Views

The fromCollection() method is used in JavaTuples to create Septet Tuple from List collection.Let us first see what we need to work with JavaTuples. To work with Septet class in JavaTuples, you need to import the following package −import org.javatuples.Septet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Septet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Septet; import java.util.*; public class Demo { public static void main(String[] ... Read More

Create Unit Tuple from another collection in Java

Samual Sam
Updated on 30-Jul-2019 22:30:25

142 Views

To create Unit Tuple from another collection, use the fromCollection() method.Let us first see what we need to work with JavaTuples. To work with the Unit class in JavaTuples, you need to import the following package −import org.javatuples.Unit;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Unit Class in Java Tuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport java.util.*; import org.javatuples.Unit; public class Demo {    public static void main(String[] args) {   ... Read More

The contains() method of Quintet class in JavaTuples

karthikeya Boyini
Updated on 30-Jul-2019 22:30:25

83 Views

Use the contains() method to search a value in the Quintet class in JavaTuples.Let us first see what we need to work with JavaTuples. To work with Quintet class in JavaTuples, you need to import the following package −import org.javatuples.Quintet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Quintet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Quintet; public class Demo { public static void main(String[] args) { ... Read More

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