Re: [Tutor] Storing dictionary value, indexed by key, into a variable
I read the article on data driven programming that Danny linked too, and did
some additional looking around. I couldn't find anything directly using Python,
but I got an idea of the concept and went crazy with it. This may still be off
the mark, but I created a complex combination of lists and dictionaries to
represent each individual instance of each demonstrative (starting only with
one):
that_those = [ [ [ {'nom': 'ille', 'clue': 'That/Those, Singular, Masculine
Nominative'},
{'gen': 'illīus', 'clue': 'That/Those,
Singular, Masculine Genitive'},
{'dat': 'illī', 'clue': 'That/Those, Singular,
Masculine Dative'},
{'acc': 'illum', 'clue': 'That/Those, Singular,
Masculine Accusative'},
{'abl': 'illō', 'clue': 'That/Those, Singular,
Masculine Ablative'} ], [{'nom': 'illī', 'clue': 'That/Those, Plural, Masculine
Nominative'},
{'gen': 'illōrum', 'clue': 'That/Those, Plural, Masculine
Genitive'},
{'dat': 'illīs', 'clue': 'That/Those, Plural, Masculine
Dative'},
{'acc': 'illōs', 'clue': 'That/Those, Plural, Masculine
Accusative'},
{'abl': 'illīs', 'clue': 'That/Those, Plural, Masculine
Ablative'} ] ], [ [ {'nom': 'illa', 'clue': 'That/Those, Singular, Feminine
Nominative'},
{'gen': 'illīus', 'clue': 'That/Those, Singular, Feminine
Genitive'},
{'dat': 'illī', 'clue': 'That/Those, Singular, Feminine
Dative'},
{'acc': 'illam', 'clue': 'That/Those, Singular,
Feminine Accusative'},
{'abl': 'illā', 'clue': 'That/Those, Singular,
Feminine Ablative'} ], [ {'nom': 'illae', 'clue': 'That/Those, Plural, Feminine
Nominative'},
{'gen': 'illārum', 'clue': 'That/Those, Plural,
Feminine Genitive'},
{'dat': 'illīs', 'clue': 'That/Those, Plural, Feminine
Dative'},
{'acc': 'illās', 'clue': 'That/Those, Plural,
Feminine Accusative'},
{'abl': 'illīs', 'clue': 'That/Those, Plural, Feminine
Ablative'} ] ]
, [ [ {'nom': 'illud', 'clue': 'That/Those, Singular, Neuter Nominative'},
{'gen': 'illīus', 'clue': 'That/Those, Singular, Neuter
Genitive'},
{'dat': 'illī', 'clue': 'That/Those, Singular, Neuter
Dative'},
{'acc': 'illud', 'clue': 'That/Those, Singular, Neuter
Accusative'},
{'abl': 'illō', 'clue': 'That/Those, Singular, Neuter
Ablative'} ], [ {'nom': 'illa', 'clue': 'That/Those, Plural, Neuter
Nominative'},
{'gen': 'illōrum', 'clue': 'That/Those, Plural, Neuter
Genitive'},
{'dat': 'illīs', 'clue': 'That/Those, Plural, Neuter
Dative'},
{'acc': 'illa', 'clue': 'That/Those, Plural, Neuter
Accusative'},
{'abl': 'illīs', 'clue': 'That/Those, Plural, Neuter
Ablative'} ] ] ]
Now, this is a big mess, for sure, but it seems possible that it is abstract
enough that I could reuse the same logic and just switch out the data to make
different types of similar programs. Also, I can write a script to populate
this structure to construct a program to drill any type of word that is
declined by gender, number and case. I can call each item pretty easily like
this:
question_to_be_dispalyed_to_user =
that_those[gender][number][q_and_a]["clue"]
answer_to_that_question = that_those[gender][number][q_and_a][case]
Where gender, number, q_and_a, and case follow Peter's suggestion:
cases = ['nom', 'gen', 'dat', 'acc', 'abl']
case = random.choice(cases)
The complete code will follow, but I have a spooky new problem. When I try to
run the following code, I intermittently get the following error:
Traceback (most recent call last):
File "./latDemTest.py", line 59, in
answer = that_those[gender][number][q_and_a][case]
KeyError: 'abl'
I looked this error up online, and it seems the key error is generated when one
attempts to retrieve a value from a dictionary with a key that does not exist.
The problem is, it seems to me that the keys should in fact exist. The odd
thing is, the code returns this error sometimes, and sometimes it doesn't. I
did a bunch of trials, keeping track of which particular entries in the data
structures worked and which failed, and I discovered that they overlap. The
dictionary {'gen': 'illōrum', 'clue': 'That/Those, Plural, Neuter Genitive'}
for example, happily spits out the proper question and answer sometimes, other
times it shoots out the previously mentioned error. I cannot understand how
this could happen!
THE FULL CODE:
#!/Library/Frameworks/Python.framework/Versions/3.2/bin/python3.2
# Don't forget ./ before filename to run from cmnd line!
Re: [Tutor] Storing dictionary value, indexed by key, into a variable
I apologize for the omissions, I thought that I had isolated the problem, but I
was way off the mark. The problem was, as suggested by Danny and Peter, in the
function where the dictionary is assigned. I ran the type function, as Alex
advised, and lo and behold the function was returning a string. In researching
this, I learned that a function can return multiple values, so I expanded
things a bit. Now, the function that randomly selects which demonstrative to
drill also selects which a string to present as the clue (the first part,
anyway), and returns the dictionary and the first part of the clue in a tuple.
I then unpack that tuple into variables and work with those.
The thing is, this looks really messy Could anyone give me some pointers on how
this could be more elegantly done?
Here's the full code:
import random
import os
# ille, that/those masculine
that_those_Masculine_Singular = {'nom': 'ille', 'gen': 'illīus', 'dat': 'illī',
'acc': 'illum', 'abl': 'illō'}
that_those_Masculine_Plural = {'nom': 'illī', 'gen': 'illōrum', 'dat': 'illīs',
'acc': 'illōs', 'abl': 'illīs'}
# the rest of the dictionaries are empty. I wanted to get it working before
putting everything in.
# ille, that/those feminine
that_those_Feminine_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
that_those_Feminine_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
# ille, that/those neuter
that_those_Neuter_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
that_those_Neuter_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '', 'abl':
''}
# hic, this/these masculine
this_these_Masculine_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
this_these_Masculine_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
# hic, this/these feminine
this_these_Feminine_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
this_these_Feminine_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
# hic, this/these neuter
this_these_Neuter_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
this_these_Neuter_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '', 'abl':
''}
# iste, that (near you/of yours) masculine
that_near_you_Masculine_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
that_near_you_Masculine_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
# iste, that (near you/of yours) feminine
that_near_you_Feminine_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
that_near_you_Feminine_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
# iste, that (near you/of yours) neuter
that_near_you_Neuter_Singular = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
that_near_you_Neuter_Plural = {'nom': '', 'gen': '', 'dat': '', 'acc': '',
'abl': ''}
guess = ''
score = 0
tries = 0
while guess != 'exit':
def chooseDemonstrative():
# N = random.randint(1,18)
N = 1 # This line will be removed so that it will pick any one
of the dictionaries to be filled in above. This is just to get it working.
Demonstrative = {}
Clue1 = ''
if N == 1:
Demonstrative = that_those_Masculine_Singular
Clue1 = 'That/Those, Masculine Singular Demonstrative
Pronoun/Adjective'
elif N == 2:
Demonstrative = 'that_those_Masculine_Plural'
elif N == 3:
Demonstrative = 'that_those_Feminine_Singular'
elif N == 4:
Demonstrative = 'that_those_Feminine_Plural'
elif N == 5:
Demonstrative = 'that_those_Neuter_Singular'
elif N == 6:
Demonstrative = 'that_those_Neuter_Plural'
elif N == 7:
Demonstrative = 'this_these_Masculine_Singular'
elif N == 8:
Demonstrative = 'this_these_Masculine_Plural'
elif N == 9:
Demonstrative = 'this_these_Feminine_Singular'
elif N == 10:
Demonstrative = 'this_these_Feminine_Plural'
elif N == 11:
Demonstrative = 'this_these_Neuter_Singular'
elif N == 12:
Demonstrative = 'this_these_Neuter_Plural'
elif N == 13:
Demonstrative = 'that_near_you_Masculine_Singular'
elif N == 14:
Demonstrative = 'that_near_you_Masculine_Plural'
elif N == 15:
Demonstrative = 'that_near_you_Feminine_Singular'
elif N == 16:
Demonstrative = 'that_near_you_Feminine_Plural'
elif N == 17:
Demonstrative = '
[Tutor] Storing dictionary value, indexed by key, into a variable
Hey all,
I am writing a program to drill the user on Latin demonstrative pronouns and
adjectives (DPA). It displays a description, and the user has to enter the DPA
that corresponds to the description. DPA vary for gender, number and case, and
there are 3 separate DPA. I have these stored in a bunch of dictionaries, with
the DPA, gender and number in the dictionary name and the cases as keys. Of
course, the values are the DPA themselves. Like so:
that_those_Masculine_Singular = {'nom': 'ille', 'gen': 'illīus', 'dat': 'illī',
'acc': 'illum', 'abl': 'illō'}
I have a function that randomly selects one of these dictionaries, and another
that randomly selects strings corresponding to the keys ('nom', 'gen', etc.).
The trouble begins somewhere along here:
D = chooseDict()
c = chooseCase()
print(D, c)
guess = ''
# code to get the guess
# then,
answer = D[c]
if guess == answer:
# Do stuff, change score, continue, etc.
This doesn't work, and I get this error:
TypeError: string indices must be integers
So my question is, why does Python think that D is a string? When I type the
actual names (i.e., that_those_Masculine_Singular["nom"]) the answer is
returned just fine. I have tried D['c'] and D["c"] also, and got the same
error. I searched the web, and I can find no explanation on how to do what I am
doing, and I can find nothing that indicates why this doesn't work. I'd really
appreciate any help!
Thank you,
J
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] basic function concept
Too bad that doesn't work. On Nov 16, 2013, at 11:16 PM, Alex Kleider wrote: > On 2013-11-16 13:20, Byron Ruffin wrote: >> def main(x, y, z): >> print (x, y, z) >> def funct(): >> x = 1 >> y = 2 >> z = 3 >> return x, y, z >> main() >> Can someone tell me why main is not being given any arguments? > > Because you didn't give it any. > Try > main(funct()) > instead. > > >> ___ >> Tutor maillist - Tutor@python.org >> To unsubscribe or change subscription options: >> https://mail.python.org/mailman/listinfo/tutor > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
