Python Basics

Question 1

After you create a string, can it be changed? Why?

Answer 1

No, because it is immutable.

Question 2

Immutable

Answer 2

Impossible to modify

Question 3

Why are there options to use either a double or single quote to make a string?

Answer 3

So that if the string contains either of those two characters, you wont unintentionally close the string early.

Question 4

What is an escape sequence?

Answer 4

a character that tells the interpreter to read a character a certain way that may normally be reserved for specific syntax.

Question 5

What are examples of escape sequences?

Answer 5

\n is new line

“”” tripple quotes also let you use both single and double quotes in a string

Question 6

What is concatination?

Answer 6

use +, it will add two strings together. Remember to use proper spacing, if you dont include a space in a string, it wont show up.

Question 7

What is in place addition?

Answer 7

+= It will append a string into a string already stored in a variable.

Question 8

What function will tell you the length of a string?

Answer 8

len(var_name)

Question 9

Everything that you create in python is an _____.

Answer 9

Object

Question 10

What is a method?

Answer 10

An ability of an object. Or, functions that belong to an object.

Question 11

How do you access methods that an object owns?

Answer 11

By using dot notation. E.g, there is a method called upper that converts all characters in a string to upper case, so you can say:

var_name.upper()

and the output will be all caps version of a string you called var_name

Question 12

What is string formatting?

Answer 12

Allows you to create a re-usable template that can be filled with data. You include a set of curly braces (called a placeholder) in a string where you want to be able to insert data, then when you call the format function, you pass data in the parens in the order that they appear in the original string.

Question 13

How do you find out if a string contains a part of a string?

Answer 13

in e.g. “pop” in “popcorn” returns True

Question 14

What is a boolean value?

Answer 14

True or false

Question 15

how do you cooerce a data type into becoming a boolean value?

Answer 15

bool()

Question 16

how do you neggate a boolean value? (return its opposite)

Answer 16

use the not keyword

Question 17

How does the “and” keyword work?

Answer 17

and will result into True only if both the operands are True

Question 18

How does the “or” keyword work?

Answer 18

or will result into True if any of the operands is True

Question 19

What is conditional branching?

Answer 19

Running specific blocks of code based on their value.

Question 20

What is the comparison operator?

Answer 20

== , it returns true or false

Question 21

What is the best practice for indentation in Python?

Answer 21

4 spaces.

Question 22

What is elif?

Answer 22

Branching keyword, combo of else if. Allows you to add an additional branch to an if else statement.

Question 23

How do you check to see if something does NOT equal something else?

Answer 23

!=