I just want to do something for transformation my string into view like: (2 ** 5)(5)(7 ** 2)(11), but my code works wrong. tell me please, where are my mistakes?!
values = [(2, 5), (5, 1), (7, 2), (11, 1)]
result = str(f'({i[0]}**{i[1]})' for i in values if i[1] != 1 else f'({i[0]})')
print(result) # (2 ** 5)(5)(7 ** 2)(11)
this is a variant:
values = [(2, 5), (5, 1), (7, 2), (11, 1)]
result = ''.join(f'({base} ** {exp})' if exp != 1 else f'({base})'
for base, exp in values)
print(result) # (2 ** 5)(5)(7 ** 2)(11)
where i use tuple unpacking to assign base and exp to the items of your list and then str.join (in the form ''.join(...)) to join the individual terms.
so in the first iteration you get base=2, exp=5 which will be converted to the string '(2 ** 5)'; on the second iteration you get base=5, exp=1which will be converted to the string '(5)' (and so on); then these strings will be joined with '' (i.e. an empty string) in between.
Place your ternary operator before the list comprehension part:
result = "".join([
f'({i[0]} ** {i[1]})' if i[1] != 1 else f'({i[0]})'
for i in values
])
print(result) # (2 ** 5)(5)(7 ** 2)(11)```
join; a generator expression would do there.that is my decision. thank to all!
result = ''.join('({} ** {})'.format(i[0], i[1]) if i[1] != 1 else '({})'.format(i[0]) for i in values)