mirror of
https://github.com/hwchase17/langchain.git
synced 2025-05-08 08:38:48 +00:00
bf5193bb99
Upgrade to using a literal for specifying the extra which is the
recommended approach in pydantic 2.
This works correctly also in pydantic v1.
```python
from pydantic.v1 import BaseModel
class Foo(BaseModel, extra="forbid"):
x: int
Foo(x=5, y=1)
```
And
```python
from pydantic.v1 import BaseModel
class Foo(BaseModel):
x: int
class Config:
extra = "forbid"
Foo(x=5, y=1)
```
## Enum -> literal using grit pattern:
```
engine marzano(0.1)
language python
or {
`extra=Extra.allow` => `extra="allow"`,
`extra=Extra.forbid` => `extra="forbid"`,
`extra=Extra.ignore` => `extra="ignore"`
}
```
Resorted attributes in config and removed doc-string in case we will
need to deal with going back and forth between pydantic v1 and v2 during
the 0.3 release. (This will reduce merge conflicts.)
## Sort attributes in Config:
```
engine marzano(0.1)
language python
function sort($values) js {
return $values.text.split(',').sort().join("\n");
}
class_definition($name, $body) as $C where {
$name <: `Config`,
$body <: block($statements),
$values = [],
$statements <: some bubble($values) assignment() as $A where {
$values += $A
},
$body => sort($values),
}
```
76 lines
2.3 KiB
Python
76 lines
2.3 KiB
Python
"""Util that calls OpenWeatherMap using PyOWM."""
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from typing import Any, Dict, Optional
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from langchain_core.pydantic_v1 import BaseModel, root_validator
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from langchain_core.utils import get_from_dict_or_env
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class OpenWeatherMapAPIWrapper(BaseModel):
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"""Wrapper for OpenWeatherMap API using PyOWM.
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Docs for using:
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1. Go to OpenWeatherMap and sign up for an API key
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2. Save your API KEY into OPENWEATHERMAP_API_KEY env variable
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3. pip install pyowm
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"""
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owm: Any
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openweathermap_api_key: Optional[str] = None
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class Config:
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extra = "forbid"
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@root_validator(pre=True)
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def validate_environment(cls, values: Dict) -> Dict:
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"""Validate that api key exists in environment."""
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openweathermap_api_key = get_from_dict_or_env(
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values, "openweathermap_api_key", "OPENWEATHERMAP_API_KEY"
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)
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try:
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import pyowm
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except ImportError:
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raise ImportError(
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"pyowm is not installed. Please install it with `pip install pyowm`"
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)
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owm = pyowm.OWM(openweathermap_api_key)
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values["owm"] = owm
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return values
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def _format_weather_info(self, location: str, w: Any) -> str:
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detailed_status = w.detailed_status
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wind = w.wind()
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humidity = w.humidity
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temperature = w.temperature("celsius")
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rain = w.rain
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heat_index = w.heat_index
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clouds = w.clouds
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return (
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f"In {location}, the current weather is as follows:\n"
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f"Detailed status: {detailed_status}\n"
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f"Wind speed: {wind['speed']} m/s, direction: {wind['deg']}°\n"
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f"Humidity: {humidity}%\n"
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f"Temperature: \n"
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f" - Current: {temperature['temp']}°C\n"
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f" - High: {temperature['temp_max']}°C\n"
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f" - Low: {temperature['temp_min']}°C\n"
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f" - Feels like: {temperature['feels_like']}°C\n"
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f"Rain: {rain}\n"
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f"Heat index: {heat_index}\n"
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f"Cloud cover: {clouds}%"
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)
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def run(self, location: str) -> str:
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"""Get the current weather information for a specified location."""
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mgr = self.owm.weather_manager()
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observation = mgr.weather_at_place(location)
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w = observation.weather
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return self._format_weather_info(location, w)
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