# OpenCage Geocoding Module for Python
A Python module to access the [OpenCage Geocoding API](https://opencagedata.com/).
## Build Status / Code Quality / etc
[](https://badge.fury.io/py/opencage)
[](https://pepy.tech/project/opencage)
[](https://pypi.org/project/opencage/)
[](https://github.com/OpenCageData/python-opencage-geocoder/actions/workflows/build.yml)
## Tutorials
You can find a [comprehensive tutorial for using this module on the OpenCage site](https://opencagedata.com/tutorials/geocode-in-python).
There are two brief video tutorials on YouTube, one [covering forward geocoding](https://www.youtube.com/watch?v=9bXu8-LPr5c), one [covering reverse geocoding](https://www.youtube.com/watch?v=u-kkE4yA-z0).
The module installs an `opencage` CLI tool for geocoding files. Check `opencage --help` or the [CLI tutorial](https://opencagedata.com/tutorials/geocode-commandline).
## Usage
Supports Python 3.8 or newer. Starting opencage version 3.0 depends on asyncio package.
Install the module:
```bash
pip install opencage
```
Load the module:
```python
from opencage.geocoder import OpenCageGeocode
```
Create an instance of the geocoder module, passing a valid OpenCage Data Geocoder API key
as a parameter to the geocoder modules's constructor:
```python
key = 'your-api-key-here'
geocoder = OpenCageGeocode(key)
```
Pass a string containing the query or address to be geocoded to the modules' `geocode` method:
```python
query = '82 Clerkenwell Road, London'
results = geocoder.geocode(query)
```
You can add [additional parameters](https://opencagedata.com/api#forward-opt):
```python
results = geocoder.geocode('London', no_annotations=1, language='es')
```
For example you can use the proximity parameter to provide the geocoder with a hint:
```python
results = geocoder.geocode('London', proximity='42.828576, -81.406643')
print(results[0]['formatted'])
# u'London, ON N6A 3M8, Canada'
```
### Reverse geocoding
Turn a lat/long into an address with the `reverse_geocode` method:
```python
result = geocoder.reverse_geocode(51.51024, -0.10303)
```
### Sessions
You can reuse your HTTP connection for multiple requests by
using a `with` block. This can help performance when making
a lot of requests:
```python
queries = ['82 Clerkenwell Road, London', ...]
with OpenCageGeocode(key) as geocoder:
# Queries reuse the same HTTP connection
results = [geocoder.geocode(query) for query in queries]
```
### Asyncronous requests
You can run requests in parallel with the `geocode_async` and `reverse_geocode_async`
method which have the same parameters and response as their synronous counterparts.
You will need at least Python 3.8 and the `asyncio` and `aiohttp` packages installed.
```python
async with OpenCageGeocode(key) as geocoder:
results = await geocoder.geocode_async(address)
```
For a more complete example and links to futher tutorials on asyncronous IO see
`batch.py` in the `examples` directory.
### Non-SSL API use
If you have trouble accesing the OpenCage API with https, e.g. issues with OpenSSL
libraries in your enviroment, then you can set the 'http' protocol instead. Please
understand that the connection to the OpenCage API will no longer be encrypted.
```python
geocoder = OpenCageGeocode('your-api-key', 'http')
```
### Exceptions
If anything goes wrong, then an exception will be raised:
- `InvalidInputError` for non-unicode query strings
- `NotAuthorizedError` if API key is missing, invalid syntax or disabled
- `ForbiddenError` API key is blocked or suspended
- `RateLimitExceededError` if you go past your rate limit
- `UnknownError` if there's some problem with the API (bad results, 500 status code, etc)
## Command-line batch geocoding
Use `opencage forward` or `opencage reverse`
```
opencage forward --help
options:
-h, --help show this help message and exit
--api-key API_KEY Your OpenCage API key
--input FILENAME Input file name
--output FILENAME Output file name
--headers If the first row should be treated as a header row
--input-columns Comma-separated list of integers (default '1')
--add-columns Comma-separated list of output columns (default 'lat,lng,_type,_category,country_code,country,state,county,_normalized_city,postcode,road,house_number,confidence,formatted')
--workers Number of parallel geocoding requests (default 1)
--timeout Timeout in seconds (default 10)
--retries Number of retries (default 5)
--api-domain API domain (default api.opencagedata.com)
--optional-api-params
Extra parameters for each request (e.g. language=fr,no_dedupe=1)
--unordered Allow the output lines to be in different order (can be faster)
--limit Stop after this number of lines in the input
--dry-run Read the input file but no geocoding
--no-progress Display no progress bar
--quiet No progress bar and no messages
--overwrite Delete the output file first if it exists
--verbose Display debug information for each request
```
<img src="batch-progress.gif"/>
## Copyright & License
This software is copyright OpenCage GmbH.
Please see `LICENSE.txt`
### Who is OpenCage GmbH?
<a href="https://opencagedata.com"><img src="opencage_logo_300_150.png"/></a>
We run a worldwide [geocoding API](https://opencagedata.com/api) and [geosearch](https://opencagedata.com/geosearch) service based on open data.
Learn more [about us](https://opencagedata.com/about).
We also run [Geomob](https://thegeomob.com), a series of regular meetups for location based service creators, where we do our best to highlight geoinnovation. If you like geo stuff, you will probably enjoy [the Geomob podcast](https://thegeomob.com/podcast/).
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"description": "# OpenCage Geocoding Module for Python\n\nA Python module to access the [OpenCage Geocoding API](https://opencagedata.com/).\n\n## Build Status / Code Quality / etc\n\n[](https://badge.fury.io/py/opencage)\n[](https://pepy.tech/project/opencage)\n[](https://pypi.org/project/opencage/)\n\n[](https://github.com/OpenCageData/python-opencage-geocoder/actions/workflows/build.yml)\n\n\n## Tutorials\n\nYou can find a [comprehensive tutorial for using this module on the OpenCage site](https://opencagedata.com/tutorials/geocode-in-python).\n\nThere are two brief video tutorials on YouTube, one [covering forward geocoding](https://www.youtube.com/watch?v=9bXu8-LPr5c), one [covering reverse geocoding](https://www.youtube.com/watch?v=u-kkE4yA-z0).\n\nThe module installs an `opencage` CLI tool for geocoding files. Check `opencage --help` or the [CLI tutorial](https://opencagedata.com/tutorials/geocode-commandline).\n\n\n## Usage\n\nSupports Python 3.8 or newer. Starting opencage version 3.0 depends on asyncio package.\n\nInstall the module:\n\n```bash\npip install opencage\n```\n\nLoad the module:\n\n```python\nfrom opencage.geocoder import OpenCageGeocode\n```\n\nCreate an instance of the geocoder module, passing a valid OpenCage Data Geocoder API key\nas a parameter to the geocoder modules's constructor:\n\n```python\nkey = 'your-api-key-here'\ngeocoder = OpenCageGeocode(key)\n```\n\nPass a string containing the query or address to be geocoded to the modules' `geocode` method:\n\n```python\nquery = '82 Clerkenwell Road, London'\nresults = geocoder.geocode(query)\n```\n\nYou can add [additional parameters](https://opencagedata.com/api#forward-opt):\n\n```python\nresults = geocoder.geocode('London', no_annotations=1, language='es')\n```\n\nFor example you can use the proximity parameter to provide the geocoder with a hint:\n\n```python\nresults = geocoder.geocode('London', proximity='42.828576, -81.406643')\nprint(results[0]['formatted'])\n# u'London, ON N6A 3M8, Canada'\n```\n\n### Reverse geocoding\n\nTurn a lat/long into an address with the `reverse_geocode` method:\n\n```python\nresult = geocoder.reverse_geocode(51.51024, -0.10303)\n```\n\n### Sessions\n\nYou can reuse your HTTP connection for multiple requests by\nusing a `with` block. 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