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Error Handling
==============
.. todo::
error enums, context managers, converting GDAL errors to python exceptions
Debugging internal GDAL functions
----------------------------------
To get more debugging information from the internal GDAL/PROJ code:
1. Enable the `CPL_DEBUG` config option.
.. note:: If setting the :envvar:`PROJ_DEBUG` environment variable
inside a Python script, make sure that it is set before
importing rasterio.
.. code-block:: python
import os
os.environ["PROJ_DEBUG"] = "2"
import rasterio
with rasterio.Env(CPL_DEBUG=True):
...
2. Activate logging in `rasterio` with the devel `DEBUG`:
More information available here: https://docs.python.org/3/howto/logging.html
Here are examples to get started.
Example - Add handler to the `rasterio` logger:
.. code-block:: python
import logging
console_handler = logging.StreamHandler()
formatter = logging.Formatter("%(levelname)s:%(message)s")
console_handler.setFormatter(formatter)
logger = logging.getLogger("rasterio")
logger.addHandler(console_handler)
logger.setLevel(logging.DEBUG)
Example - Activate default logging config:
.. code-block:: python
import logging
logging.basicConfig(format="%(levelname)s:%(message)s", level=logging.DEBUG)
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