Introduction A random sequence of events, symbols or steps often has no order and does not follow an intelligible pattern or combination. A random number generator is a system that generates random numbers from a true source of randomness. Pseudo random numbers is a sample of numbers that look close [...]
Introduction A CSV (Comma Separated Values) files is a type of plain text file that uses specific structuring to arrange tabular data. Generally comma is used to separate each specific data value. CSV format is the most common import and export format for spreadsheets and databases. csv module in Python [...]
Introduction An application uses temporary files to store intermediate information on disk. These files are located in a separate directory, which varies on different operating systems, and the name of these files are unique. The tempfile module provides several functions for creating filesystem resources securely. TemporaryFile() opens and returns an [...]
Introduction Sorting is used to arrange the data in certain order. sorted() is built-in function in python that returns a sorted list of the iterable object i.e. list, dictionary, and tuple. Python lists have a built-in list.sort() method that modifies the list in-place. Syntax of sorted() function is sorted(iterable, key=None, [...]
Bisect algorithm maintains a list in sorted order without having to call sort each time an item is added to the list. bisect module in Python defines a number of functions to keep the array in a sorted fashion. The module uses bisection algorithm to do its work. It inserts [...]
An array is a data structure which can hold more than one value. It is ordered series of elements of the same type. Arrays behave very much like lists, except that the type of objects stored in them is constrained. array module defines an object type which can compactly represent [...]
Introduction Textual data in Python is handled with str objects, or strings. Strings are immutable sequences of Unicode code points. This post discuss various built-in string methods which are used for operating on string. Checking Start and End str.startswith(prefix[, start[, end]]) : Return True if string starts with the prefix, [...]
Introduction Various string constant are defined in Python String module. Predefined string constants can be used in common scenarios. To use these constant do not forget to import import string String Constants Common string constant defined in String module are string.ascii_letters : Concatenation of the ascii_lowercase and ascii_uppercase constants.string.ascii_lowercase : [...]
Introduction When exceptions occur, it causes the current process to stop and passes it to the calling process until it is handled. If not handled, program will crash. For example, if function A calls function B which in turn calls function C and an exception occurs in function C. If [...]
Introduction Iterators are objects that allow to traverse through all the elements of a collection, regardless of its specific implementation. Iterator object must implement two special methods, __iter__() and __next__(), collectively called the iterator protocol. An object is called iterable if we can get an iterator from it. Most of [...]