Discuss how to use the Ren'Py engine to create visual novels and story-based games. New releases are announced in this section.
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This is the right place for Ren'Py help. Please ask one question per thread, use a descriptive subject like 'NotFound error in option.rpy' , and include all the relevant information - especially any relevant code and traceback messages. Use the code tag to format scripts.
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richycapy
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#1
Post
by richycapy » Mon Aug 15, 2022 2:23 am
Hi, this is a simple question for the more experienced RenPy (and Pyton) programmers:
Which one is the correct:
Code: Select all
if not "chloe_imagen_01" in pictures_taken:
or
Code: Select all
if "chloe_imagen_01" not in pictures_taken:
And from this one:
Code: Select all
if not persistent.chloe_imagen_01:
or
Code: Select all
if persistent.chloe_imagen_01 == False:
They all seem to work fine, but im not sure they are all correct
Thanks
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Ocelot
- Eileen-Class Veteran
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#2
Post
by Ocelot » Mon Aug 15, 2022 4:18 am
It is more idiomatic to write
if "chloe_imagen_01" not in pictures_taken:. First example always makes me double check operator precedence.
Second one is easy: if you ever compare something to boolean literal, you are doing it wrong.
Code: Select all
# correct
if not persistent.chloe_imagen_01:
# incorrect
if persistent.chloe_imagen_01 == False:
# correct
if something_happened:
# incorrect
if something_happened == True:
Technically there are differences between conversion to bool, checking for equality with boolean literal and checking for identity with boolean literal, but I only ever needed implicit bool conversion and rarely simultaneous checking variable type and value by testing it with
is True.
Generally you want to go with implicit conversion without checking either equality or identity.
< < insert Rick Cook quote here > >
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