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Version: 1.0


Hydra provides a few options to improve debuggability.

Printing the configuration​

Print the config for your app without running your function by adding --cfg or -c to the command line.

The --cfg option takes one argument indicating which part of the config to print:

  • job : Your config
  • hydra : Hydra's config
  • all : The full config, which is a union of job and hydra.
# A normal run:
$ python
MySQL connecting to localhost with user=root and password=1234

# just show the config without running your function:
$ python --cfg job
host: localhost
user: root
password: 1234

The printed config includes any modifications done via the command line:

$ python --cfg job
user: root
password: 1234

You can use --package or -p to select a a specific config package:

python --cfg hydra --package hydra.job
# @package hydra.job
name: my_app
config_name: config


Hydra can print information about your plugins, config search path, composition trace and more using the
--info flag.

$ python --info

Subset of output (Complete example)

Config search path
Profiling information
Composition trace