# module `concrete.compiler.client_parameters`
Client parameters.
---
## class `ClientParameters`
ClientParameters are public parameters used for key generation.
It's a compilation artifact that describes which and how public and private keys should be generated, and used to encrypt arguments of the compiled function.
### method `__init__`
```python
__init__(client_parameters: ClientParameters)
```
Wrap the native Cpp object.
**Args:**
- `client_parameters` (_ClientParameters): object to wrap
**Raises:**
- `TypeError`: if client_parameters is not of type _ClientParameters
---
### method `deserialize`
```python
deserialize(serialized_params: bytes) → ClientParameters
```
Unserialize ClientParameters from bytes of serialized_params.
**Args:**
- `serialized_params` (bytes): previously serialized ClientParameters
**Raises:**
- `TypeError`: if serialized_params is not of type bytes
**Returns:**
- `ClientParameters`: deserialized object
---
### method `function_list`
```python
function_list() → List[str]
```
Return the list of function names.
**Returns:**
- `List[str]`: list of the names of the functions.
---
### method `input_keyid_at`
```python
input_keyid_at(input_idx: int, circuit_name: str = '') → int
```
Get the keyid of a selected encrypted input in a given circuit.
**Args:**
- `input_idx` (int): index of the input in the circuit.
- `circuit_name` (str): name of the circuit containing the desired input.
**Raises:**
- `TypeError`: if arguments aren't of expected types
**Returns:**
- `int`: keyid
---
### method `input_signs`
```python
input_signs() → List[bool]
```
Return the sign information of inputs.
**Returns:**
- `List[bool]`: list of booleans to indicate whether the inputs are signed or not
---
### method `input_variance_at`
```python
input_variance_at(input_idx: int, circuit_name: str) → float
```
Get the variance of a selected encrypted input in a given circuit.
**Args:**
- `input_idx` (int): index of the input in the circuit.
- `circuit_name` (str): name of the circuit containing the desired input.
**Raises:**
- `TypeError`: if arguments aren't of expected types
**Returns:**
- `float`: variance
---
### method `lwe_secret_key_param`
```python
lwe_secret_key_param(key_id: int) → LweSecretKeyParam
```
Get the parameters of a selected LWE secret key.
**Args:**
- `key_id` (int): keyid to get parameters from
**Raises:**
- `TypeError`: if arguments aren't of expected types
**Returns:**
- `LweSecretKeyParam`: LWE secret key parameters
---
### method `output_signs`
```python
output_signs() → List[bool]
```
Return the sign information of outputs.
**Returns:**
- `List[bool]`: list of booleans to indicate whether the outputs are signed or not
---
### method `serialize`
```python
serialize() → bytes
```
Serialize the ClientParameters.
**Returns:**
- `bytes`: serialized object