unit 3 compsci

python in operator and what it reutrns

.  It will return True if the element is a member of the sequence and False if it is not.  

1. Python’s range() function creates a set of integers you can iterate over.  Describe the arguments you can pass to the range function and how they affect the sequence returned.

range function can pass 1, 2, 3 arguments

range(0,10,2)

{0, 2, 4. 6, 8}

addition of two strings is known as

concatentation

immutable sequence and mutable sequence difference

immutable - cannot be changed

mutable - changed

for ____ in ___________

item sequence

append(item)

adds an item to a list

insert(index, item)

adds the item at the index passed. all other elements are shifted

remove(item)

removes the first occurrence of an item

pop(index)

returns and removes the item at the index

sort()

sorts the list in ascending order

reverse()

reverses the contents of list

count(item)

returns the number of items in a list

index(item)

returns the position of a item in the list

1. If outfit = (“socks”, “shoes”, “shirt”, “pants”, “bracelet”), what do each of the following return

outfit[2]

outfit[-3:-1]

outfit[2:]

shirt

(shirt, pants, bracelet)

(shirt, pants, bracelet)

names.pop(1)

removes the element at index 1

given str = “Welcome to programming” what does str[:3] + [18:] do?

“Welming”

str = “Mickey Mouse” what does len(str) return

12

output of the print(crazy[1:3]) if crazy = [ ‘xyz’, 123, 9.87, ‘joe’, 45.6 ]?

[123, 9.87]

:3 includes the index before it

if holler = “red rover, red rover…”what would be the output of print(holler[11:21]

red rover

NOT A LIST!! COMMAS ARE INCLUDED