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This document outlines how to express each TensorFlow operation on top of _loco_
**CAUTION** All the python examples below are written in Python 3 with TensorFlow v1.13.
**DISCLAIMER** _loco_ does not support named values, but all the below _loco_ examples assign "name" to each value to make it easy to read.
### Placeholder
**Placeholder** in _TensorFlow_ corresponds to **Pull** in _loco_.
_Python_:
```python
import tensorflow as tf
input = tf.placeholder(dtype=tf.float32, shape=[3, 4], name='input')
print(tf.get_default_graph().as_graph_def())
```
API reference: [tf.placeholder](https://www.tensorflow.org/versions/r1.13/api_docs/python/tf)
_TensorFlow_
```prototext
node {
name: "input"
op: "Placeholder"
attr {
key: "dtype"
value { type: DT_FLOAT }
}
attr {
key: "shape"
value {
shape {
dim { size: 3 }
dim { size: 4 }
}
}
}
}
```
_loco_:
```
%input = Pull(dtype: FLOAT32, shape: [3, 4])
Push(%input)
```
### Identity
**Identity** in _TensorFlow_ corresponds to **Forward** in _loco_.
_Python_:
```python
import tensorflow as tf
input = tf.placeholder(dtype=tf.float32, shape=[3, 4])
ident = tf.identity(input)
print(tf.get_default_graph().as_graph_def())
```
API reference: [tf.identity](https://www.tensorflow.org/api_docs/python/tf/identity)
_TensorFlow_:
```
node {
name: "Placeholder"
op: "Placeholder"
attr {
key: "dtype"
value { type: DT_FLOAT }
}
attr {
key: "shape"
value {
shape {
dim { size: 3 }
dim { size: 4 }
}
}
}
}
node {
name: "Identity"
op: "Identity"
input: "Placeholder"
attr {
key: "T"
value { type: DT_FLOAT }
}
}
```
_loco_:
```
%input = Pull(dtype: FLOAT32, shape: [3, 4])
%ident = Forward(%input)
Push(%ident)
```
### Const
**Const** in _TensorFlow_ corresponds to **ConstGen** in _loco_.
_Python_:
```python
import tensorflow as tf
constant = tf.constant(value=[1.0], dtype=tf.float32, shape=[3, 4])
tf.get_default_graph().as_graph_def()
```
API reference: [tf.constant](https://www.tensorflow.org/versions/r1.13/api_docs/python/tf/constant)
_TensorFlow_:
```
node {
name: "Const"
op: "Const"
attr {
key: "dtype"
value { type: DT_FLOAT }
}
attr {
key: "value"
value {
tensor {
dtype: DT_FLOAT
tensor_shape {
dim { size: 3 }
dim { size: 4 }
}
float_val: 1.0
}
}
}
}
```
_loco_:
```
%constant = ConstGen(dtype: FLOAT32, shape: [3, 4], data: ...);
Push(%constant)
```
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