Accessing values in a nested dictionary

[errantknight]

Hello, I am new to both renpy and python. I could get the info in just python but I'm having trouble doing the same in renpy. I can't get any info other than [key]. When trying to get info via v[key] it gives an error so my question is how do I access the nested keys and values? Or should I be setting up this information differently.

Code: Select all

 
init python:


    F01 = {
        'name': 'Food01',
        'recipe': ['orange','red','blue'],
        'text': 'Item 01'
    }
    F02 = {
        'name': 'Food02',
        'recipe': ['blue', 'green', 'orange'],
        'text': 'Item 02'
    }

    fooddic = {
        'F01' : F01,
        'F02' : F02
    }



define n = Character("")
define x = 'recipe'

# The game starts here.

label start:
    python:
        for k, v in fooddic.items():
            for key in v:
                if key == x:
                    say(n,"Result: [key] [v[key]]", interact=True)


    return

errorcode:

Code: Select all

I'm sorry, but an uncaught exception occurred.

While running game code:
  File "game/script.rpy", line 33, in script
    python:
  File "game/script.rpy", line 37, in <module>
    say(n,"Result: [key] [v[key]]", interact=True)
  File "renpy/common/00library.rpy", line 284, in say
    who(what, interact=interact, *args, **kwargs)
KeyError: 'key'

-- Full Traceback ------------------------------------------------------------

Full traceback:
  File "game/script.rpy", line 33, in script
    python:
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\ast.py", line 1111, in execute
    renpy.python.py_exec_bytecode(self.code.bytecode, self.hide, store=self.store)
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\python.py", line 1049, in py_exec_bytecode
    exec(bytecode, globals, locals)
  File "game/script.rpy", line 37, in <module>
    say(n,"Result: [key] [v[key]]", interact=True)
  File "renpy/common/00library.rpy", line 284, in say
    who(what, interact=interact, *args, **kwargs)
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\character.py", line 1240, in __call__
    what = self.prefix_suffix("what", self.what_prefix, what, self.what_suffix)
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\character.py", line 1159, in prefix_suffix
    return (sub(prefix) + sub(body) + sub(suffix))
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\character.py", line 1139, in sub
    return renpy.substitutions.substitute(s, scope=scope, force=force, translate=translate)[0]
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\substitutions.py", line 278, in substitute
    s = formatter.vformat(s, (), kwargs) # type: ignore
  File "/home/tom/ab/renpy-build/tmp/install.linux-x86_64/lib/python3.9/string.py", line 165, in vformat
  File "/home/tom/ab/renpy-build/tmp/install.linux-x86_64/lib/python3.9/string.py", line 205, in _vformat
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\substitutions.py", line 168, in get_field
    obj, arg_used = super(Formatter, self).get_field(field_name, args, kwargs)
  File "/home/tom/ab/renpy-build/tmp/install.linux-x86_64/lib/python3.9/string.py", line 278, in get_field
KeyError: 'key'

Windows-10-10.0.19043 AMD64
Ren'Py 8.0.0.22062402
DictionaryTesting 1.0
Fri Jul  1 13:46:56 2022

[Alex]

...

You have two options

Code: Select all

    python:
        for k, v in fooddic.items():
            for key in v:
                if key == x:
                    say(n,"Result: {} {}".format(key, v[key]), interact=True)
                    #say(n,"Result: %s %s" %(key, v[key]), interact=True)

[zmook]

Square-bracket substitution like "[key]" is a renpy thing, not a python thing, so it only happens within renpy statements. The 'python:' block is a pure python context, where you have to use standard python string substitution.

https://realpython.com/python-string-formatting/

Personally I prefer the "old style" python %-substitution in renpy projects because renpy strings frequently include curly braces and it's annoying to have to keep track of what's supposed to be quoted and what isn't.

[m_from_space]

Not giving another answer, but since you are new to python and renpy and I don't know how much data you handled, I would suggest using a different structure for your food dictionary. Avoiding confusion and unnecessary data handling is key. You don't have to put everything inside one big dictionary you then have problems accessing.

Code: Select all

define food_repices = {
    'Food01': ['orange','red','blue'],
    'Food02': ['blue', 'green', 'orange']
}
define food_texts = {
    'Food01': 'Item01',
    'Food02': 'Item02'
}

label start:

    # show a recipe using renpy subsitutions (note that accessing a key doesn't require using quotation marks)
    "Recipe for Food01: [food_recipes[Food01]] (Description: [food_texts[Food01]])"

    # show all recipes and descriptions
    python:
        for name, recipe in food_recipes.items():
            renpy.say(n,"Recipe for {}: {} (Description: {})".format(name, recipe, food_texts[name]), interact=True)

[errantknight]

I am still getting a key error with the: say(n,"Result: %s %s" % (key, v[key]), interact=True)

Code: Select all

I'm sorry, but an uncaught exception occurred.

While running game code:
  File "game/script.rpy", line 33, in script
    python:
  File "game/script.rpy", line 37, in <module>
    say(n,"Result: %s %s" % (key, v[key]), interact=True)
  File "renpy/common/00library.rpy", line 284, in say
    who(what, interact=interact, *args, **kwargs)
KeyError: "'orange', 'red', 'blue'"

-- Full Traceback ------------------------------------------------------------

Full traceback:
  File "game/script.rpy", line 33, in script
    python:
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\ast.py", line 1111, in execute
    renpy.python.py_exec_bytecode(self.code.bytecode, self.hide, store=self.store)
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\python.py", line 1049, in py_exec_bytecode
    exec(bytecode, globals, locals)
  File "game/script.rpy", line 37, in <module>
    say(n,"Result: %s %s" % (key, v[key]), interact=True)
  File "renpy/common/00library.rpy", line 284, in say
    who(what, interact=interact, *args, **kwargs)
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\character.py", line 1240, in __call__
    what = self.prefix_suffix("what", self.what_prefix, what, self.what_suffix)
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\character.py", line 1159, in prefix_suffix
    return (sub(prefix) + sub(body) + sub(suffix))
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\character.py", line 1139, in sub
    return renpy.substitutions.substitute(s, scope=scope, force=force, translate=translate)[0]
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\substitutions.py", line 278, in substitute
    s = formatter.vformat(s, (), kwargs) # type: ignore
  File "/home/tom/ab/renpy-build/tmp/install.linux-x86_64/lib/python3.9/string.py", line 165, in vformat
  File "/home/tom/ab/renpy-build/tmp/install.linux-x86_64/lib/python3.9/string.py", line 205, in _vformat
  File "S:\Program Files\Renpy\renpy-8.0.0-sdk\renpy\substitutions.py", line 168, in get_field
    obj, arg_used = super(Formatter, self).get_field(field_name, args, kwargs)
  File "/home/tom/ab/renpy-build/tmp/install.linux-x86_64/lib/python3.9/string.py", line 270, in get_field
  File "/home/tom/ab/renpy-build/tmp/install.linux-x86_64/lib/python3.9/string.py", line 227, in get_value
KeyError: "'orange', 'red', 'blue'"

Windows-10-10.0.19043 AMD64
Ren'Py 8.0.0.22062402
DictionaryTesting 1.0
Tue Jul  5 11:35:02 2022

@m_from_space, That's fair! My goal was to eliminate some of the repetitiveness but if I can't access it doesn't really matter. I want to try and get the python %-substitution working but if not I'll take your advice and de nest everything and go from there.

[zmook]

"'orange', 'red', 'blue'" is a *value* in food_recipes, not a key, so it's not surprising that python complains it can't find it as a key in that dictionary. Somehow you've got things flipped around. If you show us your actual code, we can maybe tell you what to fix.

[errantknight]

Ah thank you for pointing that out. The code above is basically it with say(n,"Result: [key] [v[key]]", interact=True) flipped for say(n,"Result: %s %s" %(key, v[key]), interact=True) but I don't think I grasp it well enough so I'm going to go with m_from_space advice for now and just unnest everything. Thank you everyone for your assistance, it's given me some direction and things to further dig into.