Stefan Ram wrote:
> My course participants always are impatient for "useful
> applications". So at a point in my course where no control
> structures (if, for, while, ...) have been introduced yet,
> but function calls, function declarations, assignments,
> lists and dictionaries already were introduced, I wanted to
> show a vocabulary trainer.
>
> One starts it by »main()«. It then asks for a translation
> of a word to German:
>
>>>> main()
> table
>
> . Now, one can think about the answer and eventually press
> return to see the answer:
>
> Tisch
> horse
>
> and at the same time, the next question is shown.
>
> Here is the source code:
>
> vocs = { 'table': 'Tisch', 'book': 'Buch', 'rain': 'Regen', 'horse':
> 'Pferd' }
For this use case I would prefer a list of tuples
word_pairs = [
("table", "Tisch"),
...
]
Then
def main():
while True:
en, de = random.choice(word_pairs)
input(en)
print(de)
> import random
>
> def main():
> v = random.choice( list( vocs.keys() ))
> print( v, end='' )
> input()
> print( vocs[ v ]);
> main()
>
> Are there improvements possible (like shorter source code
> or a better programming style)? (The recursion will be
> replaced by »while« as soon as »while« is introduced.)
>
> On the console, I used:
>
> i = input()
>
> just to hide the result of »input()«. I only write to »i«,
> I do not read from it. JavaScript has »void« to convert
> something to »undefined«. Is there a standard means in
> Python to convert a value to »None« (which also would have
> the effect of not showing the value)?
>
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