Chapter 6- String Manipulation

Question 1

Raw string

Answer 1

> > > print(r’That is Carol's cat.’)
That is Carol's cat.

The r is inside the printer argument but outside of strong

Question 2

Indexing strings

Answer 2

>>> spam = 'Hello world!'
>>> spam[0]
'H'
>>> spam[4]
'o'

Question 3

Slicing strings

Answer 3

> > > spam = ‘Hello world!’
fizz = spam[0:5]
fizz
‘Hello’

Question 4

In and not in strings

Answer 4

>>> 'Hello' in 'Hello World'
True
>>> 'Hello' in 'Hello'
True
>>> 'HELLO' in 'Hello World'
False
>>> '' in 'spam'
True
>>> 'cats' not in 'cats and dogs'
False

Question 5

Upper()

Lower()

Answer 5

Converts the entire strong into upper or lower 
>>> spam = 'Hello world!'
>>> spam = spam.upper()
>>> spam
'HELLO WORLD!'
>>> spam = spam.lower()
>>> spam
'hello world!'

Question 6

Important about upper() and lower()
Also how do I adjust for users inputting
Great GrEat and great

Answer 6

They do not change the string value
Unless you have an assignment 
But the return is still a string
print('How are you?')
feeling = input()
if feeling.lower() == 'great':
    print('I feel great too.')
else:
    print('I hope the rest of your day is good.')

Question 7

IsUpper()

IsLower()

Answer 7

Returns a boolean value of true or false
return a Boolean True value if the string has at least one letter and all the letters are uppercase or lowercase, respectively.
»> ‘abc12345’.islower()
True

Question 8

Startswith()

Endswith()

Answer 8

Return True. They are Boolean

Question 9

Split()

Answer 9

The split() method does the opposite: It’s called on a string value and returns a list of string

By default, the string ‘My name is Simon’ is split wherever whitespace characters such as the space, tab, or newline characters are found

Question 10

Join()

Answer 10

The join() method is useful when you have a LIST of strings that need to be joined together into a single string value. The join() method is called

> > > ’, ‘.join([‘cats’, ‘rats’, ‘bats’])
‘cats, rats, bats’
‘ ‘.join([‘My’, ‘name’, ‘is’, ‘Simon’])
‘My name is Simon’
‘ABC’.join([‘My’, ‘name’, ‘is’, ‘Simon’])
‘MyABCnameABCisABCSimon’

Question 11

ABC’.join([‘My’, ‘name’, ‘is’, ‘Simon’])

Answer 11

It will join the list with the value called as the middle point

MyABCnameABCisABCSimon

Question 12

Remember that join()

Answer 12

Remember that join() is called on a string value and is passed a list value

Question 13

Split() at something else besides white space

What happens to the value you set as the delimiter

Answer 13

> > > ‘MyABCnameABCisABCSimon’.split(‘ABC’)
[‘My’, ‘name’, ‘is’, ‘Simon’]
‘My name is Simon’.split(‘m’)
[‘My na’, ‘e is Si’, ‘on’]

It gets deleted

Question 14

Spam.split(‘\n’)

Answer 14

Will split everywhere there is a new line

Don’t confuse this with white space

Question 15

Rust()

ljust()

Answer 15

The rjust() and ljust() string methods return a padded version of the string they are called on, with spaces inserted to justify the text. The first argument to both methods is an integer length for the justified string.

The argument is how long you want the new string to be

Question 16

R justify for string length 10
R justify for string length 20
“Hello World”

Answer 16

>>> 'Hello'.rjust(10)
'     Hello'
>>> 'Hello'.rjust(20)
'               Hello'
>>> 'Hello World'.rjust(20)
'         Hello World'
>>> 'Hello'.ljust(10)
'Hello     '

Question 17

An optional second argument to rjust() and ljust()

Answer 17

> > > ‘Hello’.rjust(20, ‘’)
‘****Hello’
‘Hello’.ljust(20, ‘-‘)
‘Hello—————’

Question 18

Center()

Answer 18

> > > ‘Hello’.center(20)
‘ Hello ‘
‘Hello’.center(20, ‘=’)
‘=======Hello========’

Question 19

Strip()
Lstrip()
Rsttip()

Answer 19

>>> spam = '    Hello World     '
>>> spam.strip()
'Hello World'
>>> spam.lstrip()
'Hello World '
>>> spam.rstrip()
'    Hello World'

Question 20

Strip() argument

Answer 20

You can specify what CHARACTERS you want to strip

> > > spam = ‘SpamSpamBaconSpamEggsSpamSpam’
spam.strip(‘ampS’)
‘BaconSpamEggs’

Spam=Smap=Spma

Question 21

Escape characters for 
Single quote 
Double quote
Tab
New line
Backslash

Answer 21

\'
\"
\tab
\n
\\
OR USE TRIPLE QUOTES