# otp.Source.Symbol
### *class* SymbolType
Bases: [`object`](https://docs.python.org/3/builtins/functions.html#object)
You can get symbol name and symbol parameters with this class.
### Examples
```pycon
>>> symbols = otp.Symbols('US_COMP_SAMPLE')[:3]
>>> symbols['PARAM'] = 'PAM'
>>> ticks = otp.DataSource('US_COMP_SAMPLE', tick_type='TRD')
>>> ticks = ticks[['PRICE']][:1]
>>> ticks['SYMBOL_PARAM'] = ticks.Symbol['PARAM', str]
>>> ticks['SYMBOL_NAME'] = ticks.Symbol.name
>>> ticks = otp.merge([ticks], symbols=symbols)
>>> otp.run(ticks, date=otp.dt(2024, 2, 1))
Time PRICE SYMBOL_PARAM SYMBOL_NAME
0 2024-02-01 04:00:00.008283417 186.50 PAM AAPL
1 2024-02-01 04:00:00.097381367 14.33 PAM AAL
2 2024-02-01 07:56:00.692942080 131.40 PAM A
```
#### SEE ALSO
[Databases, symbols, and tick types](https://docs.pip.distribution.sol.onetick.com/static/concepts/symbols.html.md#symbols-concept)
[Symbol Parameters Objects](https://docs.pip.distribution.sol.onetick.com/api/misc/symbol_param.html.md#symbol-parameters-objects)
#### *property* name
Get symbol name.
* **Return type:**
[\_SymbolParamColumn](https://docs.pip.distribution.sol.onetick.com/api/misc/symbol_param.html.md#onetick.py.core._source._symbol_param._SymbolParamColumn)
### Examples
```pycon
>>> symbols = otp.Symbols('US_COMP_SAMPLE')[:3]
>>> ticks = otp.DataSource('US_COMP_SAMPLE', tick_type='TRD')
>>> ticks = ticks[['PRICE']][:1]
>>> ticks['SYMBOL_NAME'] = ticks.Symbol.name
>>> ticks = otp.merge([ticks], symbols=symbols)
>>> otp.run(ticks, date=otp.dt(2024, 2, 1))
Time PRICE SYMBOL_NAME
0 2024-02-01 04:00:00.008283417 186.50 AAPL
1 2024-02-01 04:00:00.097381367 14.33 AAL
2 2024-02-01 07:56:00.692942080 131.40 A
```
#### get(name, dtype, default=None)
Get symbol parameter by name.
* **Parameters:**
* **name** ([*str*](https://docs.pip.distribution.sol.onetick.com/api/operation/str/root.html.md#onetick.py.Operation.str)) -- The name of the symbol parameter to retrieve.
* **dtype** ([*type*](https://docs.python.org/3/builtins/functions.html#type)) -- The expected data type of the symbol parameter value.
* **default** (*Any* *,* *optional*) -- The default value to return if the symbol parameter is not found.
Default is `None`, which means that default value of dtype will be used.
* **Return type:**
[Operation](https://docs.pip.distribution.sol.onetick.com/api/operation/root.html.md#onetick.py.Operation)
### Examples
```pycon
>>> symbols = otp.Symbols('US_COMP_SAMPLE')[:3]
>>> symbols['PARAM'] = 'PAM'
>>> ticks = otp.DataSource('US_COMP_SAMPLE', tick_type='TRD')
>>> ticks = ticks[['PRICE']][:1]
>>> ticks['SYMBOL_PARAM'] = ticks.Symbol.get(name='PARAM', dtype=str, default='default')
>>> ticks = otp.merge([ticks], symbols=symbols)
>>> otp.run(ticks, date=otp.dt(2024, 2, 1))
Time PRICE SYMBOL_PARAM
0 2024-02-01 04:00:00.008283417 186.50 PAM
1 2024-02-01 04:00:00.097381367 14.33 PAM
2 2024-02-01 07:56:00.692942080 131.40 PAM
```
```pycon
>>> symbol1 = otq.Symbol('US_COMP_SAMPLE::AAPL', params={'PARAM': 1})
>>> symbol2 = otq.Symbol('US_COMP_SAMPLE::MSFT')
>>> data = otp.DataSource(tick_type='TRD')
>>> data = data.table(PRICE=float, strict=True)[:1]
>>> data['P'] = data.Symbol.get(name='PARAM', dtype=int, default=10)
>>> data = otp.merge([data], symbols=[symbol1, symbol2], identify_input_ts=True)
>>> otp.run(data, date=otp.dt(2024, 2, 1))
Time PRICE P SYMBOL_NAME TICK_TYPE
0 2024-02-01 04:00:00.008283417 186.50 1 US_COMP_SAMPLE::AAPL TRD
1 2024-02-01 04:00:00.016997102 400.15 10 US_COMP_SAMPLE::MSFT TRD
```
#### \_\_getattr_\_(item)
Get symbol parameter by name. Notice, that symbol parameter type will be string.
#### Deprecated
Deprecated since version 1.74.0: Please, use `__getitem__()` method.
* **Return type:**
[\_SymbolParamColumn](https://docs.pip.distribution.sol.onetick.com/api/misc/symbol_param.html.md#onetick.py.core._source._symbol_param._SymbolParamColumn)
#### \_\_getitem_\_(item)
Get symbol parameter by name.
* **Parameters:**
**item** ([*tuple*](https://docs.python.org/3/builtins/stdtypes.html#tuple)) -- The first parameter is string - symbol parameter name. The second one is symbol parameter type.
* **Return type:**
[\_SymbolParamColumn](https://docs.pip.distribution.sol.onetick.com/api/misc/symbol_param.html.md#onetick.py.core._source._symbol_param._SymbolParamColumn)
### Examples
The second parameter is symbol parameter's type.
```pycon
>>> symbols = otp.Symbols('US_COMP_SAMPLE')[:3]
>>> symbols['PARAM'] = 5
>>> ticks = otp.DataSource('US_COMP_SAMPLE', tick_type='TRD')
>>> ticks = ticks[['PRICE']][:1]
>>> ticks['SYMBOL_PARAM'] = ticks.Symbol['PARAM', int] + 1
>>> ticks['SYMBOL_PARAM'].dtype
>>> ticks = otp.merge([ticks], symbols=symbols)
>>> otp.run(ticks, date=otp.dt(2024, 2, 1))
Time PRICE SYMBOL_PARAM
0 2024-02-01 04:00:00.008283417 186.50 6
1 2024-02-01 04:00:00.097381367 14.33 6
2 2024-02-01 07:56:00.692942080 131.40 6
```
It also works with [`msectime`](https://docs.pip.distribution.sol.onetick.com/api/types/msectime.html.md#onetick.py.msectime) and [`nsectime`](https://docs.pip.distribution.sol.onetick.com/api/types/nsectime.html.md#onetick.py.nsectime) types:
```pycon
>>> symbols = otp.Symbols('US_COMP_SAMPLE')[:3]
>>> symbols['NSECTIME_PARAM'] = symbols['Time'] + otp.Nano(100)
>>> symbols['MSECTIME_PARAM'] = symbols['Time'] + otp.Milli(1)
>>> ticks = otp.DataSource('US_COMP_SAMPLE', tick_type='TRD')
>>> ticks = ticks[['PRICE']][:1]
>>> ticks['NSECTIME_PARAM'] = ticks.Symbol['NSECTIME_PARAM', otp.nsectime] + otp.Nano(1)
>>> ticks['MSECTIME_PARAM'] = ticks.Symbol['MSECTIME_PARAM', otp.msectime] + otp.Milli(1)
>>> ticks['NSECTIME_PARAM'].dtype
>>> ticks['MSECTIME_PARAM'].dtype
>>> ticks = otp.merge([ticks], symbols=symbols)
>>> otp.run(ticks, date=otp.dt(2024, 2, 1))
Time PRICE NSECTIME_PARAM MSECTIME_PARAM
0 2024-02-01 04:00:00.008283417 186.50 2024-02-01 00:00:00.000000101 2024-02-01 00:00:00.002
1 2024-02-01 04:00:00.097381367 14.33 2024-02-01 00:00:00.000000101 2024-02-01 00:00:00.002
2 2024-02-01 07:56:00.692942080 131.40 2024-02-01 00:00:00.000000101 2024-02-01 00:00:00.002
```