Keywords

PyneCore supports all Pine Script v6 keywords. The PyneComp compiler translates them to their Python equivalents.

Variable Declaration

var

Declares a variable that persists its value across bars. Without var, variables are re-initialized on every bar.

  var float mySum = 0.0
mySum += close

In PyneCore, var compiles to a persistent variable managed by the AST transformer. The value is stored and restored between bar executions automatically.

varip

Similar to var, but also persists between real-time bar updates (intrabar ticks). In historical bars, it behaves identically to var.

  varip int tickCount = 0
tickCount += 1

PyneCore supports varip in the same way as var for offline/historical execution. The distinction only matters in live real-time mode.

Control Flow

if

Conditional execution. Supports else if and else branches.

  if close > open
    label.new(bar_index, high, "Bull")
else if close < open
    label.new(bar_index, low, "Bear")

Compiles directly to Python’s if/elif/else.

switch

Pattern matching on values or conditions.

  switch syminfo.type
    "stock"  => strategy.entry("Long", strategy.long)
    "forex"  => strategy.entry("Short", strategy.short)
    =>          runtime.error("Unsupported")

Compiles to Python’s match/case (Python 3.10+) or if/elif chains.

for

Count-controlled loop.

  for i = 0 to 9
    sum += array.get(arr, i)

Compiles to Python’s for i in range(...).

for…in

Iterates through array or matrix elements.

  for [i, val] in arr
    sum += val

Compiles to Python’s for i, val in enumerate(arr).

while

Condition-controlled loop.

  while i > 0
    sum += i
    i -= 1

Compiles directly to Python’s while.

The loop must eventually terminate. Use break to exit early.

Modules and Types

import

Loads an external Pine Script library.

  import TradingView/ta/7

PyneComp resolves library imports at compile time.

export

Makes functions or type definitions available to other scripts when used in a library.

  export myFunction(float x) => x * 2

type

Declares a user-defined type (UDT).

  type OrderInfo
    string id
    float price
    int qty

Compiles to a Python dataclass.

enum

Declares an enumeration with predefined constants.

  enum Direction
    Up
    Down
    Sideways

Compiles to a Python enum class.

method

Enables dot-notation function calls on a type.

  method getRange(OrderInfo this) =>
    this.price * this.qty

Compiles to a method on the corresponding Python class.

Logical Operators (Keywords)

and / or / not

See Operators.