---
title: thunder.core.proxies.FloatProxy
canonical: >-
  https://lightning.ai/docs/thunder/stable/api-reference/generated/thunder.core.proxies.FloatProxy
---
# thunder.core.proxies.FloatProxy {#thunder-core-proxies-floatproxy}

### `class thunder.core.proxies.FloatProxy(name=None, value=None, history=None, constraint=None, tags=None)` {#thunder.core.proxies.FloatProxy}

[\[source\]](https://github.com/Lightning-AI/lightning-thunder/blob/0.2.6/thunder/core/proxies.py#L1176-L1212)

Bases: `NumberProxy`

Parameters:

*   **history** (_None_ _|_ [_tuple_](https://docs.python.org/3/builtins/stdtypes.html#tuple "(in Python v3.15)")) –
    
*   **constraint** (_None_ _|_ _CONSTRAINT_) –
    
*   **tags** ([_set_](https://docs.python.org/3/builtins/stdtypes.html#set "(in Python v3.15)") _|_ _None_) –
    

#### `__init__(name=None, value=None, history=None, constraint=None, tags=None)` {#thunder.core.proxies.FloatProxy.__init__}

[\[source\]](https://github.com/Lightning-AI/lightning-thunder/blob/0.2.6/thunder/core/proxies.py#L1179-L1189)

Parameters:

*   **history** ([_Union_](https://docs.python.org/3/library/typing.html#typing.Union "(in Python v3.15)")_\[__None__,_ [_tuple_](https://docs.python.org/3/builtins/stdtypes.html#tuple "(in Python v3.15)")_\]_) –
    
*   **constraint** ([_Union_](https://docs.python.org/3/library/typing.html#typing.Union "(in Python v3.15)")_\[__None__,_ _CONSTRAINT__\]_) –
    
*   **tags** ([_Optional_](https://docs.python.org/3/library/typing.html#typing.Optional "(in Python v3.15)")_\[_[_set_](https://docs.python.org/3/builtins/stdtypes.html#set "(in Python v3.15)")_\]_) –
    

Methods

- [`__init__([name, value, history, constraint, ...])`](#thunder.core.proxies.FloatProxy.__init__)
- `get_default_prefix()` — rtype:str
- `is_dynamic()` — rtype:bool
- `is_static_constrained()` — rtype:bool
- `known_value()` — rtype:bool
- `make_constrainable()`
- `make_static_constrained()`
- [`replace(**changes)`](#thunder.core.proxies.FloatProxy.replace) — Return a copy of the FloatProxy object with new values for the specified fields as given to the constructor as arguments.
- `replace_name([name, disambiguate])` — Return a copy of this proxy with the given name.
- `type_string()`

Attributes

- `name`
- `prefix` — Return the prefix for this proxy instance.
- `tags`

#### `replace(**changes)` {#thunder.core.proxies.FloatProxy.replace}

[\[source\]](https://github.com/Lightning-AI/lightning-thunder/blob/0.2.6/thunder/core/proxies.py#L1191-L1205)

Return a copy of the FloatProxy object with new values for the specified fields as given to the constructor as arguments. Valid keyword arguments are `name`, `history`, `value`, `constraint`. Note that the copy will use the current (environment) tracectx.

---

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