Back again on f-strings

[newbieAuggie2019]

def print_nicely(iterable):
    iterable =  list(map(str, iterable))
    if len(iterable) > 1:
        print(f"'{', '.join(iterable[:-1])} and {iterable[-1]}'")
    elif len(iterable) ==  1:
        print(f"'{iterable[0]}'")
    else:
        raise ValueError('Expecting non-empty iterable')

print_nicely(['apples', 'bananas', 'tofu', 'cats']) # print list
print_nicely(['bird']) # print single element list
print_nicely(range(4)) # print range object
print_nicely([])

Output:
'apples, bananas, tofu and cats'
'bird'
'0, 1, 2 and 3'
Traceback (most recent call last):
  File "***", line 13, in <module>
    print_nicely([])
  File "***", line 8, in print_nicely
    raise ValueError('Expecting non-empty iterable')
ValueError: Expecting non-empty iterable

by the way i may have seen a package on PyPI that does it but cannot find it at the moment

Thanks a lot!

Although I like your creative way of thinking, in this case, you have transformed the 4 lines I wanted to simplify, using f-strings:

def commaCode(list1):
    print("'", end='')
    print(*list1[:-1], sep=', ', end=",")
    print(' and', list1[-1], end=".'\n\n")

into actually 8 lines of code (maybe 6 if we eliminate the last 2 lines):

def print_nicely(iterable):
    iterable =  list(map(str, iterable))
    if len(iterable) > 1:
        print(f"'{', '.join(iterable[:-1])} and {iterable[-1]}'")
    elif len(iterable) ==  1:
        print(f"'{iterable[0]}'")
    else:
        raise ValueError('Expecting non-empty iterable')

I think that as I don't know about 'map()', I prefer Perfringo's one liner in this case, but I have not sorted out the problem with the numerical list yet.

Thanks and all the best,

---

I found it
https://github.com/jazzband/inflect

import inflect
p = inflect.engine()
print(p.join(['apples', 'bananas', 'tofu', 'cats'])) # print list
print(p.join(['bird'])) # print single element list
print(p.join(list(map(str, range(4))))) # print range object
print(p.join([]))

Output:
apples, bananas, tofu, and cats
bird
0, 1, 2, and 3

Thanks a lot!

That looks to me much clearer than the other one.

Thanks and all the best,