Python Scripting Flash Cards!

Front 1

What is a Python Virtual Environment used for?

Back 1

It creates a separate logical directory from the rest of the Linux directory, so different projects can be worked on in different virtual environments

Front 2

Which command installs Python Virtual Environments?

Back 2

"pip install venv"

Front 3

What command creates a Python Virtual Environment?

Back 3

“python3 -m venv (dirname)”

Front 4

How do you activate the Virtual Environment?

Back 4

"source dirname/bin/activate"

Front 5

What file is created to install all tools needed for your Development Environment?

Back 5

"requirements.txt"

Front 6

What kind of Python operators can you use to install exact or certain versions of programs listed in the requirements.txt file?

Back 6

Boolean Operators can be == / <= / >= to indicate exact version # / version less than or equal to defined version # / greater than or equal to the defined version #

Front 7

What commands do you enter to save the state of the virtual environment and exit?

Back 7

"pip freeze" to save and "deactivate" to exit

Front 8

What Python Data types are "mutable"?

Back 8

List, Dictionary, Set

Front 9

What Python data type is objects enclosed in a Parenthesis? ( )

Back 9

Tuple - Contains random data types like strings / integers / floats

Front 10

What Python data type is in Key:Value Pairs in curly brackets? { }

Back 10

Dictionary - Unordered Key:Value pairs

Front 11

What Python data type is in curly brackets but not Key:Value pairs? { }

Back 11

Set - Unordered set of unique objects

Front 12

What Python data type is in straight brackets? [ ]

Back 12

List - Sequence of objects delimited by quotes (strings)

Front 13

What are Methods in Python?

Back 13

They are functions from a library imported or built in, to manipulate Python objects

Front 14

How do you see an imported libraries Methods or Functions that can be used? What is the Verbose help file on the library?

Back 14

"help(libraryname)" for the Verbose help file, or "dir(libraryname)" to just see the functions

Front 15

What does zero indexing mean in Python?

Back 15

Whether it is a string or a list of items, objects start in the 0 position, so "Hello" is 0-4 characters when working with manipulating that object!

Front 16

What is PEP8? What is PyPI?

Back 16

PEP8 is "Python Enhancement Proposal" best practices, PyPI is the python "pip" library

Front 17

What is an "if" Statement? How is it different from a Loop?

Back 17

If Statements in Python run through a Boolean series of truths that branch out to a final result (if / elif / else) and then the scripts ends

Front 18

Which Loop type can cause an infinite loop?

Back 18

A "while" loop that never stops iterating

Front 19

What is a "while" loop used for?

Back 19

It is used to iterate repeatedly, likely running some embedded function within the loop, until it hits the end of the loop and exits

Front 20

What is a "for" loop?

Back 20

"for" loops are used to perform an action based on the criteria specified, like a range of numbers

Front 21

What does the "break" statement do?

Back 21

It exits a "while" loop that is meant to be infinite until the correct input is received, such as the loop "while True:" will loop forever with no break

Front 22

How do you begin to create a custom function?

Back 22

"def functionname():"

Front 23

Do you use 1 tab or 4 spaces for Python indentation between code blocks?

Back 23

4 spaces as tabs give different indentation in different environments

Front 24

What is a Python "Class"?

Back 24

Classes are created to define a generic object that can be referenced over and over to not type the same code for every time you use the same data / objects

Front 25

What are *args and *kwargs when creating a custom function? What purpose do they serve?

Back 25

Args and Kwargs are used as Variables when you are not sure how many variables might pass through your function, "def functionname(*args): or "def functionname(**kwargs):

Front 26

What is DRY and KISS in Python?

Back 26

PEP8 concepts "Don't repeat yourself" and "Keep it simple stupid!"

Front 27

What is "inheritance" in Python?

Back 27

Inheritance is creating a new class from an existing class that share the same attributes, the existing class is basically copied into the new class along with any extra objects your define

Front 28

What is Object Oriented Programming vs Procedural Programming?

Back 28

Object Oriented Programming is meant to re-use code / objects within a script, whereas Procedural Programming is code meant to execute from top to bottom in one iteration

Front 29

What module allows you to use files from the underlying OS that you are running Python in?

Back 29

"import os"

Front 30

What are "dunders" and "magic methods" in Python? How or they identified?

Back 30

They perform core functions in Python like initializing a newly created Class with "__init__" and are identified by the two underscores on each side of the object

Front 31

How do you create your own module / library to import into another Python script, and use the functions within it in a new script?

Back 31

Create a Python script, "import sys" in the new script, then you can "from (script) import (function)" into the new script

Front 32

What kind of Python Object cannot be imported into a script and functions extracted for use?

Back 32

Classes that are created via Inheritance from an existing Class,

Front 33

What are the 3 main ways to use Modules in Python for DEVASC exam day?

Back 33

Importing "pip" built in modules, creating your own modules (scripts), or writing code in C# and compiling it before using in your Python script

Front 34

Which module can you import to allow Python to interact with objects on your device?

Back 34

"import sys"