IT hands-on

Context managers  make it possible for us to manage our resources. When  python  enters a  context , it calls the  __enter__()  methods and it calls the  __exit

A  list  is an aggregate of elements enclosed in brackets. A  list comprehension  is constituted of: an expression.  a for loop.  an if clause within the loop

Below is one of the ways that we could use to combine two dictionaries into one: We could even use more than two dictionaries as we can see in the belo

Iterators  loop over existing elements in a list  for example. Generators  generate elements as we ask for them, which helps us not overload the memory in

Below are a couple of examples of how to turn a  dictionary  into a  list . Our first example used the  items()  method for form a  list  as we see below: Our s

Sometimes, we lose track of our variables inside big chunks of code. Python gives us the possibility to display variables depending on their  namespace

A  dictionary  usually maps a  key  to one  value . Sometimes, we need a  key  to be linked to  multiple values . We could do that using  lists  as you can see be

For example, we have the below dictionary  " d ". We could print the values  of our  dictionary , using the below code: Or by using this variation:

Enum  is python  object that represents a group of variables that are assigned a constant value. Below is a simple example -  we need to include the "

We could use the " while ... else " construct to break out of a " while " loop as soon as a condition is fulfilled. In the below exampl

When we pass a  mutable  default argument to a function -  here the  __init__()  funtion - , that accepts a list, changing the default  mutable  argument  will a

The  #ifdef  -  #endif statement dictates what parts of a program are taken into account during compilation, depending on whether a variable is defined or

For  classes  with small, simple data, we could save memory by using the  __slots__  attribute to the class.  For example the  Car  class below: With  __slots_

We could use  decorators  with parameters for example to control the flow of the execution of a  decorator  as we can see below: As we can see above, we co

We create an custom iterator function that we will use with a " for " loop: We use it as below: The " yield " function acts as a return

The below example reads input from the " /home/albert/file " file and prints it: We use " StopIteration " exception to exit a loop so i

Iterables  are objects that we can loop through, like - <i> lists, tuples, sets, dictionaries, strings, ... </i> -. We have the below list with different member

We have the below list  composed of pairs, we list it using the below: We could also list the pairs as below: We could also list all the elements of the  l

Injection of  sidecar  in a  kubernetes  application, means that  istio  is going to modify the deployment's  Yaml  file of our  pods  to include a  side car

When using a  bash  script, we could have "replacement" default arguments if none are given. Our example replaces the " $1 " with repla

Istio  provides  loadbalancing  for  kubernetes . It also supports  retries  for failing  pods  and  circuit breaking  to reject requests for  pods  with a " de