[Solved] Basic Python

[Lezalith]

I realized the other day I am doing so much in Ren'Py and I can't even do basic Python stuff.
On one hand, it's nice that Ren'Py allows such a coding-noob to create stuff, however, I'm lost when I need stuff like defining functions...

Situation:
Upon entering a screen, if variable PersuasionValue is greater than 100, it is saved onto PersuasionValueStorage before being changed to 100.
Upon exiting the screen, value of PersuasionValue is restored.

Code: Select all

# Defining first function
def albatros():
    global PersuasionValue
    global PersuasionValueStorage
    if PersuasionValue > 100:
        PersuasionValueStorage = PersuasionValue
        PersuasionValue = 100
        
# Defining second function
def pigeon():
    global PersuasionValue
    global PersuasionValueStorage
    PersuasionValue = PersuasionValueStorage

# Then, upon entering the screen, I add it to the button functions.
button:
    background something
    xpos xxxx
    ypos xxxx
    action Show("Screen"),albatros()

# And same when exiting the screen.
button:
    background something
    xpos xxxx
    ypos xxxx
    action Show("Screen"),pigeon()

The error I get is Expected Statement when defining both functions.

Code: Select all

def albatros->():
def pigeon->():

I thought that's how functions are defined?
It even used to work, then I deleted that piece of code, tried something else, and wrote back the same thing (What you see above here).


Follow-up question:
If I understood variables correctly, when I do

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$ PersuasionValue = 20

I am declaring a global variable, thus I need to write

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global PersuasionValue

when using that variable inside the defined function, right?

[theCodeCat]

You need to put your python function definitions into a "init python:" block.

You are mostly correct about the global variables thing, but you only need to add the "global ..." line if you are modifying the value of the variable. If you are just reading from it, the "global ..." line is not necessary.

[Lezalith]

Thanks a bunch!

One more question if I may, is it possible to have more conditions in a conditional switch?
Let's say if I wanted to have an image based on time and season.

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image camp = ConditionalSwitch(
"time=day, season=summer","day_summer.jpg"
"time=day, season=winter","day_winter.jpg"
"time=night, season=summer","night_summer.jpg"
"time=night, season=winter","night_winter.jpg"
)

I tried this, but it didn't work.

[xavimat]

is it possible to have more conditions in a conditional switch?

- You can define a complex condition with "and", but the comma (,) has no meaning in conditions.
- A single equal (=) is used to asing a variable. To check you need double equal (==)
- Always end the condition with an always-True condition, to avoid the ConditionSwitch getting angry.
- Also, there where some commas missing at the end of the lines

Code: Select all

image camp = ConditionalSwitch(
    "time==day and season==summer","day_summer.jpg",
    "time==day and season==winter","day_winter.jpg",
    "time==night and season==summer","night_summer.jpg",
    "True","night_winter.jpg"
)

[Ocelot]

You can define a complex condition with "and", but the comma (,) has no meaning in conditions.

If only. It introduces a tuple and generally makes condition always true.

[Lezalith]

Thank you all!