Get a list of the running docker containers

$ docker container ls

ubuntu apt-get update Error while moving old database out of the way

sudo touch /var/cache/app-info/xapian/default

python class __ or private class component

When any class component has a name starting with two underscores (__), it becomes private - this means that it can be accessed only from within the class.

python find length of stack

class Stack:

    def __init__(self):

        self.stackList = [1,2,3]

stackObject = Stack()

print(len(stackObject.stackList))

Python Stack as class

class Stack:    # defining the Stack class

    def __init__(self):    # defining the constructor function

        print("Hi!")

stackObject = Stack()    # instantiating the object

Python Stack push() pop()

stack = []

def push(val):

    stack.append(val)

def pop():

    val = stack[-1]

    del stack[-1]

    return val

push(3)

push(2)

push(1)

print(pop())

print(pop())

print(pop())

Covert python .py file to .exe

pip install pyinstaller

pyinstaller --onefile -w filename.py