Python strings questions

String interpolation is the process of evaluating a string literal containing one or more placeholders, yielding a result in which the placeholders are replaced with their corresponding values. There are three common ways to interpolate strings in Python:

All whitespace characters from a string can be removed by using replace method replacing whitespace with null string

Starting with Python 3.7, dictionary is insertion-ordered. So, dict.fromkeys(mylist) will remove the duplicate characters from the string preserving the original order of the characters in the string. Creating a list with the dict keys and joining the individual characters into a string using the join function will give the string with duplicates removed. To remove the duplicate characters from a string and the original order of the string need not be preserved, assigning the string to a set and then converting it back to list and joining the individual characters into a string using the join function will give the string with duplicates removed. (sets will not necessarily maintain the order of characters of the string)

break('Hello')

split('Hello')

list('Hello')

unpack('Hello')

len(list('Hi Python!'))

s8 = 'PYTHON'
print(s8[-1])

s9 = 'gk' 'nxt'
print(s9)

s7 = 'grEat'
s7.upper( )
print(s7)

s2 = 'thong'
s4 = 'happy'
print('python' in (s4 + s2))

s = 'Hawai'
print(s[ : :-1][ : :-4])

s = 'Hawai'
print(s[ : :-1] + s[len(s)])

s = 'Hawai'
print(s[ : :-1] [-1]+s[ : :-1][-5])

s = 'Hawai'
print(s[ : :-2] [ : :-2])

s = 'apple'
print(s.find('p')+s.find('f')+s.find(''))

"USA's $100b-plan q&a on WhatsApp".title( )

s = 'the smart owl'
print(s[-9:-100:-2])

s = 'Python'
print(s[ : ] == s)

s = 'Python'
print(s[ : :-1] [ : :-1] == s)

s = 'Python'
print(s[ : ] is s)

s = 'Python'
print(s[ : :-1] [ : :-1] is s)

s = '-4' '\\-2'
print(len(s))

s = 'apple'
print(s.upper( ).lower( ) == s)

s = 'apple'
print(s.strip('-') == s)

s = 'apple'
print('-'.join(s.split('-')) == s)

s = 'apple'
print('-'.join(s.partition('-')) == s)