Handle Pinescript using Python
- Parse Pinescript code into AST
- Dump parsed AST
- Unparse parsed AST back to Pinescript code
Given an example pinescript with name of rsi_strategy.pine:
//@version=5
strategy("RSI Strategy", overlay=true)
length = input( 14 )
overSold = input( 30 )
overBought = input( 70 )
price = close
vrsi = ta.rsi(price, length)
co = ta.crossover(vrsi, overSold)
cu = ta.crossunder(vrsi, overBought)
if (not na(vrsi))
if (co)
strategy.entry("RsiLE", strategy.long, comment="RsiLE")
if (cu)
strategy.entry("RsiSE", strategy.short, comment="RsiSE")
//plot(strategy.equity, title="equity", color=color.red, linewidth=2, style=plot.style_areabr)
Parsing script into AST and dumping it:
$ pynescript parse-and-dump rsi_strategy.pineGives like:
Script(
body=[
Expr(
value=Call(
func=Name(id='strategy', ctx=Load()),
args=[
Arg(
value=Constant(value='RSI Strategy')),
Arg(
value=Constant(value=True),
name='overlay')])),
Assign(
target=Name(id='length', ctx=Store()),
value=Call(
func=Name(id='input', ctx=Load()),
args=[
Arg(
value=Constant(value=14))]),
annotations=[]),
...Full AST dump that is quite long...
Script(
body=[
Expr(
value=Call(
func=Name(id='strategy', ctx=Load()),
args=[
Arg(
value=Constant(value='RSI Strategy')),
Arg(
value=Constant(value=True),
name='overlay')])),
Assign(
target=Name(id='length', ctx=Store()),
value=Call(
func=Name(id='input', ctx=Load()),
args=[
Arg(
value=Constant(value=14))]),
annotations=[]),
Assign(
target=Name(id='overSold', ctx=Store()),
value=Call(
func=Name(id='input', ctx=Load()),
args=[
Arg(
value=Constant(value=30))]),
annotations=[]),
Assign(
target=Name(id='overBought', ctx=Store()),
value=Call(
func=Name(id='input', ctx=Load()),
args=[
Arg(
value=Constant(value=70))]),
annotations=[]),
Assign(
target=Name(id='price', ctx=Store()),
value=Name(id='close', ctx=Load()),
annotations=[]),
Assign(
target=Name(id='vrsi', ctx=Store()),
value=Call(
func=Attribute(
value=Name(id='ta', ctx=Load()),
attr='rsi',
ctx=Load()),
args=[
Arg(
value=Name(id='price', ctx=Load())),
Arg(
value=Name(id='length', ctx=Load()))]),
annotations=[]),
Assign(
target=Name(id='co', ctx=Store()),
value=Call(
func=Attribute(
value=Name(id='ta', ctx=Load()),
attr='crossover',
ctx=Load()),
args=[
Arg(
value=Name(id='vrsi', ctx=Load())),
Arg(
value=Name(id='overSold', ctx=Load()))]),
annotations=[]),
Assign(
target=Name(id='cu', ctx=Store()),
value=Call(
func=Attribute(
value=Name(id='ta', ctx=Load()),
attr='crossunder',
ctx=Load()),
args=[
Arg(
value=Name(id='vrsi', ctx=Load())),
Arg(
value=Name(id='overBought', ctx=Load()))]),
annotations=[]),
Expr(
value=If(
test=UnaryOp(
op=Not(),
operand=Call(
func=Name(id='na', ctx=Load()),
args=[
Arg(
value=Name(id='vrsi', ctx=Load()))])),
body=[
Expr(
value=If(
test=Name(id='co', ctx=Load()),
body=[
Expr(
value=Call(
func=Attribute(
value=Name(id='strategy', ctx=Load()),
attr='entry',
ctx=Load()),
args=[
Arg(
value=Constant(value='RsiLE')),
Arg(
value=Attribute(
value=Name(id='strategy', ctx=Load()),
attr='long',
ctx=Load())),
Arg(
value=Constant(value='RsiLE'),
name='comment')]))],
orelse=[])),
Expr(
value=If(
test=Name(id='cu', ctx=Load()),
body=[
Expr(
value=Call(
func=Attribute(
value=Name(id='strategy', ctx=Load()),
attr='entry',
ctx=Load()),
args=[
Arg(
value=Constant(value='RsiSE')),
Arg(
value=Attribute(
value=Name(id='strategy', ctx=Load()),
attr='short',
ctx=Load())),
Arg(
value=Constant(value='RsiSE'),
name='comment')]))],
orelse=[]))],
orelse=[]))],
annotations=[
'//@version=5'])Parsing into AST and unparsing it back:
$ pynescript parse-and-unparse rsi_strategy.pineGives (with some difference in syntax including spacing):
//@version=5
strategy("RSI Strategy", overlay=true)
length = input(14)
overSold = input(30)
overBought = input(70)
price = close
vrsi = ta.rsi(price, length)
co = ta.crossover(vrsi, overSold)
cu = ta.crossunder(vrsi, overBought)
if not na(vrsi)
if co
strategy.entry("RsiLE", strategy.long, comment="RsiLE")
if cu
strategy.entry("RsiSE", strategy.short, comment="RsiSE")
- Python 3.10 or higher
You can install Pynescript via pip from PyPI:
$ pip install pynescriptPlease see the Usage for details.
Distributed under the terms of the LGPL 3.0 license, Pynescript is free and open source software.
If you encounter any problems, please file an issue along with a detailed description.