Ren'Py reserves all names beginning with a single underscore (_). Do not use names beginning with an underscore in your code.
The following is a list of names that are used by Python. Re-using these names can lead to obscure problems.
The following is a list of names that are used by Ren'Py. While in some cases it makes to redefine these names, one should be aware that doing so can cause obscure problems.
AddToSet()
AlphaBlend()
AlphaDissolve()
AlphaMask()
AnimatedValue()
At()
AudioPositionValue()
BarValue
Borders()
Character()
Color
ComposeTransition()
ConditionSwitch()
Confirm()
CropMove()
DictInputValue()
DictValue()
Dissolve()
Drag
DragGroup
DynamicDisplayable()
DynamicImage()
EndReplay()
Fade()
FieldInputValue()
FieldValue()
FileAction()
FileCurrentPage()
FileCurrentScreenshot()
FileDelete()
FileJson()
FileLoad()
FileLoadable()
FileNewest()
FilePage()
FilePageName()
FilePageNameInputValue()
FilePageNext()
FilePagePrevious()
FileSave()
FileSaveName()
FileScreenshot()
FileSlotName()
FileTakeScreenshot()
FileTime()
FileUsedSlots()
Fixed()
Flatten()
FontGroup()
Frame()
Function()
Gallery
GamepadCalibrate()
GamepadExists()
Grid()
HBox()
Help()
Hide()
HideInterface()
If()
Image()
ImageDissolve()
InputValue
InvertSelected()
Jump()
Language()
LiveComposite()
LiveCrop()
LiveTile()
MainMenu()
MixerValue()
MouseMove()
MoveTransition()
Movie()
MultiPersistent
MultipleTransition()
MusicRoom
NoRollback
Notify()
Null()
NullAction()
OpenURL()
ParameterizedText()
Pause()
PauseAudio()
Pixellate()
Placeholder()
PlayCharacterVoice()
Preference()
PushMove()
Queue()
QuickLoad()
QuickSave()
Quit()
RemoveFromSet()
Replay()
RestartStatement()
Return()
RollForward()
Rollback()
RollbackToIdentifier()
ScreenVariableInputValue()
ScreenVariableValue()
Screenshot()
SelectedIf()
SensitiveIf()
SetCharacterVolume()
SetDict()
SetField()
SetMixer()
SetMute()
SetScreenVariable()
SetVariable()
SetVoiceMute()
Show()
ShowMenu()
ShowTransient()
ShowingSwitch()
SideImage()
Skip()
SnowBlossom()
Solid()
Sprite
SpriteManager
Start()
StaticValue()
Style
StylePreference()
Text()
ToggleDict()
ToggleField()
ToggleMute()
ToggleScreenVariable()
ToggleSetMembership()
ToggleVariable()
ToggleVoiceMute()
Tooltip
Transform
VBox()
VariableInputValue()
VariableValue()
VoiceReplay()
With()
XScrollValue()
YScrollValue()
adv
blinds
center
dissolve
ease
fade
hpunch
irisin
left
main_menu
menu()
mouse_visible
move
moveinright
moveoutright
name_only
narrator
offscreenleft
offscreenright
pixellate
pushright
reset
right
save_name
say
slideawayleft
slideleft
squares
sv
topleft
topright
truecenter
voice()
voice_can_replay()
voice_replay()
voice_sustain()
vpunch
wipeleft
zoomin
zoominout
zoomout
Ren'Py reserves filenames beginning with an underscore or "00".