The memory and CPU utilization of a Kubernetes cluster can be checked by using the following command.
kubectl top nodes
The above command will list all the nodes in the Kubernetes cluster and shows the CPU utilization and memory utilization.
To list all the nodes in a Kubernetes cluster, use the following command.
kubectl get nodes
Snake and Ladder is a very popular game. We all are familiar with the dice that we use in this game. Here I am explaining a simple program that simulates the dice. I will be using random() function in python to implement this feature.
The random module has so many functionalities and features. Here we will be using the random integer generation feature of the random module.
First lets get the simple program ready.
import random dice_value = random.randint(1,6) print(dice_value)
The random.randint() function is the core logic in this function. The arguments 1 and 6 are the lower and upper limits of the random integer values. The function will return values between both these numbers including these numbers.
Now let us try to give some more look and feel to the program. I have added some more lines of code to improve usability. This will give a visual effect also.
Calculating the area of a triangle is a very fundamental problem statement. Here I am explaining the calculation of the area of a triangle using Heron's Formula.
This is a formula which has been in use from the past 2000 year. We can easily calculate the area of a triangle if we know the measurement of all the three sides of a triangle.
Area = (s(s-a) * (s-b) * (s-c)) ^ 0.5
where s = (a+b+c) / 2
We will use the above formula in a python program and make a utility to calculate the area in a programmatic way.
Pandas is a high-level data manipulation tool commonly used in python. It is build on Numpy and the key data structure is DataFrame.
Here I am explaining a sample python program to convert a Pandas Dataframe into a list of dictionaries.
In the below program, we are reading a csv file and loading it in pandas. You can configure the delimiter as per your requirement. The required_fields is an optional parameter that can be used to limit or select the required fields in the Dataframe from the csv. By default, it picks up all the fields in the file.
There are requirements where we have to split a large list into a set of smaller lists. This is a common requirement in places where we use parallel processing. Here is a sample program in python to split a larger list into a set of smaller lists.
Raspberry Pi is one of the powerful device invented in this era. During my school days and college days, all the automation circuits and hobby circuits were developed either directly by soldering components in the generic circuit board or by using a micro controllers like Arduino. The set up and debug effort was more and the programming was limited to Arduino processing language.
With the invention of Raspberry Pi, the possibilities are endless. It is a mini computer with all the facilities of a desktop PC. Users can develop and run any programs as they wish. The device also comes with options to connect to several peripherals and extension circuit boards.
Here I will be explaining a very simple program, like the baby step towards the world of automation using Raspberry Pi. We will use Raspberry Pi to control an LED (Turn OFF and ON).
A powerful feature of the Raspberry Pi is the row of GPIO (general-purpose
input/output) pins along the top edge of the board. Any of the GPIO pins can
be designated (in software) as an input or output pin and used for a wide
range of purposes. In this example, we are using a python program to control
the GPIO pins and turn ON/OFF LED.
pip install RPi.GPIO
