# An expression containing the same kind of quotes as the outer f-string

songs = ['Take me back to Eden', 'Alkaline', 'Ascensionism']

f"This is the playlist: {", ".join(songs)}"

# An example of the previously maximal level of nesting

f"""{f'''{f'{f"{1+1}"}'}'''}"""

# An example of the new, unlimited level of nesting

f"{f"{f"{f"{f"{f"{1+1}"}"}"}"}"}"

# An f-string with newlines inside the expression part

f"This is the playlist: {", ".join([

'Take me back to Eden', # My, my, those eyes like fire

'Alkaline', # Not acid nor alkaline

'Ascensionism' # Take to the broken skies at last

])}"

# Two instances of string escaping used inside the expression part

print(f"This is the playlist: {"\n".join(songs)}")

print(f"This is the playlist: {"\N{BLACK HEART SUIT}".join(songs)}")