IT hands-on

Kubernetes manages a cluster which contains nodes . Below is a simple diagram that summarizes its role: The nodes host pods , which run containers . Kuberne

We can easily convert a  Sting into a tuple by using the constructor function of the class tuple <i><b> Tuples:</b></i> A tuple is a data type in Python that is ordered

Strings  in python  are immutable. Below is an example that illustrates that characteristic of strings: We get the error mentioned above : " TypeError

Istio  allows all traffic going out of the service mesh.  All traffic goes through the  envoy proxy  - <i> default service proxy for istio </i> -. We could stop tra

A  tuple  is a group of references to different items. These references or locations in memory are immutable, but the items these references point to co

The " * " can be used for un-packing  lists ,  tuples , or  sets  as we see in the following examples. For  tuples : For  lists : And for  sets :

We can inject a  sidecar proxy  in a running deployment of  pods . Envoy is the default proxy for  Istio . Below is a diagram that shows an injected  Envoy  co

We have for example the below  list : When we try to sort it, we get the above error, since the list is a mix of  integers  and  strings . We could remedy tha

To handle errors we use the " try/except/else/finally " clauses. Below is a simple illustrating their use: The code will continue running inste

Below is an example of a  decorator function  that uses the arguments of the original function - <i> non-decorated function</i>  -. <i> Remark:</i> The numbers describes t

Sometimes we don't want the local variables in nested functions to be interpreted as local variable by  python . Below is a simple example using the

Decorators  are a way to add functionalities to a function without altering the original one. In the below example, we make the  original()  function prin

Dataclass  is a class  decorator  that makes it easy for us to create classes that are "data" oriented. for example: Is equivalent to: The  @datac

We have the below data structures: We try to add an elements to one list as below: Appending " 10 " to  list1  does not add " 10 " to  list

In the below example, we make a  shallow copy  " l2 " of a list " l1 " using regular " = " assignment, we also make a  deep copy

In order to help  istio  handle network problems, we could use for example the  automatic retries . Within the  automatic reply  parameter, we could also set

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

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 we override a function in a subclass. The  super()  function helps us call the "original" method in the parent class as we can see in the