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Articles by Pradeep Elance
Page 21 of 31
How to Create a New Ext4 File System in Linux?
The hard disk in a computer is formatted with specific file system so that the operating system can read and write into it. For UNIX based systems we have various type of file systems. In this article we will see how to format a new partition in hard disk with ext4 file system.Available Filesystem typesFirst we see what are the different file systems available for the current operating system. The below command lists all those file systems.$ ls -1 /sbin/mkfs*Running the above code gives us the following result −/sbin/mkfs /sbin/mkfs.bfs /sbin/mkfs.cramfs /sbin/mkfs.ext2 /sbin/mkfs.ext3 /sbin/mkfs.ext4 /sbin/mkfs.ext4dev /sbin/mkfs.fat /sbin/mkfs.minix /sbin/mkfs.msdos /sbin/mkfs.ntfs /sbin/mkfs.vfatLook ...
Read MoreHow to Change or Set System Locales in Linux
We often need to customise the operating system to become useful to our own preferences like the language we want to use the time zone we are in the type of currency which would become the default currency in the OS etc. In this article we will see how to customise these options which is known as locale.Current localeWe can check the current locally by using the locale command as shown below. We get list of variables which can be reset to a different value as per our choice later$ localeRunning the above code gives us the following result −LANG=en_US.UTF-8 ...
Read MoreDisplay Command Output or File Contents in Column Format in Linux
Sometimes there may be too many columns crammed into a single file. That makes it difficult to read the content of the file and point out which data belongs to which column. In order to have a better view, we ca use certain commands that will allocate space between the columns and also mark some separation characters that will make it clear to see the beginning and end of the column.Sample FileLets’ look at the below sample file which we will use to demonstrate the column command. $ cat iris.dataRunning the above code gives us the following result −Id, SepalLengthCm, ...
Read MorePython - Get items in sorted order from given dictionary
The Python dictionary has key and value pairs. In some situation we will need the items of the dictionary to be sorted according to the keys. In this article we'll see the different ways to get a sorted output from the items in the dictionary.Using Operator ModuleThe Operator module has itemgetter function which can take 0 as the index of input parameter for the keys of the dictionary. We apply the sorted function on top of itemgetter and get the sorted output.Example Live Demodict = {12 : 'Mon', 21 : 'Tue', 17: 'Wed'} import operator print("Given dictionary", str(dict)) print ("sorted order ...
Read MoreCollapsible Pane in Tkinter Python
Tkinter is the GUI building library of python. In this article we will see how we can create a collapsible pane. They are usefult when we have some large amount of data to be displayed over a GUI canvas but we do not want to be displayed always. It is made collapsible so that it can be displayed as and when needed.The below program creates the collapsible pane where we see the result both after expanding and contracting the arrow. The code comments indicate the approach we take at each step.Examplefrom tkinter import * import tkinter as tk from tkinter ...
Read MoreBinning method for data smoothing in Python
Many times we use a method called data smoothing to make the data proper and qualitative for statistical analysis. During the smoking process we define a range also called bin and any data value within the range is made to fit into the bin. This is called the binning method. Below is an example of binning. Then we will see how we can achieve the binning method using a Python program.Binning ExampleLet’s take a series of numbers. Find the maximum and minimum values. Decide on the number of bins we need depending on how many data points the analysis needs. ...
Read MoreASCII art using Python pyfiglet module
The ASCII text can be used to display many stylish texts by using the module pyfiglet. After installing this module we can use it to control the font that can be used to display the result. In the below program we see various results by choosing various font types.Example# import pyfiglet module import pyfiglet #Text in default font out = pyfiglet.figlet_format("Point") print(out)OutputRunning the above code gives us the following result −Example# import pyfiglet module import pyfiglet #Text in slant font out = pyfiglet.figlet_format("Point", font="slant") print(out)OutputRunning the above code gives us the following result −Example# import pyfiglet module import pyfiglet #Text ...
Read MoreAdd one Python string to another
By adding strings in python we just concatenate them to get a new string. This is useful in many scenarios like text analytics etc. Below are the two approaches we consider for this task.Using += OperatorThe + operator can be used for strings in a similar was as it is for numbers. The only difference being, in case of strings the concatenation happens and not a numeric addition.Example Live Demos1 = "What a beautiful " s2 = "flower " print("Given string s1 : " + str(s1)) print("Given string s2 : " + str(s2)) #Using += operator res1 = s1+s2 print("result ...
Read MoreAdd list elements with a multi-list based on index in Python
Lists can be nested. Which means we have smaller lists as elements inside a bigger list. In this article we solve the challenge of adding the elements of a simple list to the elements of a nested list. If the length of the lists are different then the length of the smaller list becomes the maximum length of the resulting list.Below are the various methods to accomplish this.Using for LoopIn this method, we take the length of the smaller list and loop through the elements of this list adding it to the elements of the bigger list. Here we use ...
Read MoreAdd trailing Zeros to a Python string
As part of data processing activity we sometimes need to append one string with another. In this article we will see how to append dynamic number of zeros to a given string. This can be done by using various string functions as shown in the programs below.Using ljust and lenPython string method ljust() returns the string left justified in a string of length width. Padding is done using the specified fillchar (default is a space). The len() returns the length of the string. We add trailing zeros to the string by manipulating the length of the given string and the ...
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