dvc/commands/experiments/diff.py
from dvc.cli import completion, formatter
from dvc.cli.command import CmdBase
from dvc.cli.utils import append_doc_link
from dvc.commands.metrics import DEFAULT_PRECISION
from dvc.exceptions import DvcException
from dvc.log import logger
from dvc.ui import ui
logger = logger.getChild(__name__)
class CmdExperimentsDiff(CmdBase):
def run(self):
try:
diff = self.repo.experiments.diff(
a_rev=self.args.a_rev,
b_rev=self.args.b_rev,
all=self.args.all,
param_deps=self.args.param_deps,
)
except DvcException:
logger.exception("failed to show experiments diff")
return 1
if self.args.json:
ui.write_json(diff)
elif diff:
from dvc.compare import show_diff
precision = self.args.precision or DEFAULT_PRECISION
diffs = [("metrics", "Metric"), ("params", "Param")]
for idx, (key, title) in enumerate(diffs):
if idx:
# we are printing tables even in `--quiet` mode
# so we should also be printing the "table" separator
ui.write(force=True)
show_diff(
diff[key],
title=title,
markdown=self.args.markdown,
no_path=self.args.no_path,
on_empty_diff="diff not supported",
precision=precision if key == "metrics" else None,
a_rev=self.args.a_rev,
b_rev=self.args.b_rev,
)
return 0
def add_parser(experiments_subparsers, parent_parser):
EXPERIMENTS_DIFF_HELP = "Show changes between experiments."
experiments_diff_parser = experiments_subparsers.add_parser(
"diff",
parents=[parent_parser],
description=append_doc_link(EXPERIMENTS_DIFF_HELP, "exp/diff"),
help=EXPERIMENTS_DIFF_HELP,
formatter_class=formatter.RawDescriptionHelpFormatter,
)
experiments_diff_parser.add_argument(
"a_rev", nargs="?", help="Old experiment to compare (defaults to HEAD)"
).complete = completion.EXPERIMENT
experiments_diff_parser.add_argument(
"b_rev",
nargs="?",
help="New experiment to compare (defaults to the current workspace)",
).complete = completion.EXPERIMENT
experiments_diff_parser.add_argument(
"--all",
action="store_true",
default=False,
help="Show unchanged metrics/params as well.",
)
experiments_diff_parser.add_argument(
"--param-deps",
action="store_true",
default=False,
help="Show only params that are stage dependencies.",
)
experiments_diff_parser.add_argument(
"--json",
action="store_true",
default=False,
help="Show output in JSON format.",
)
experiments_diff_parser.add_argument(
"--md",
action="store_true",
default=False,
dest="markdown",
help="Show tabulated output in the Markdown format (GFM).",
)
experiments_diff_parser.add_argument(
"--no-path",
action="store_true",
default=False,
help="Don't show metric/param path.",
)
experiments_diff_parser.add_argument(
"--precision",
type=int,
help=(
"Round metrics/params to `n` digits precision after the decimal "
f"point. Rounds to {DEFAULT_PRECISION} digits by default."
),
metavar="<n>",
)
experiments_diff_parser.set_defaults(func=CmdExperimentsDiff)