From ffcac582ce01065a907f03f179cb4076fa531e24 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20=C4=8Cervenka?= <jan.cervenka@yahoo.com>
Date: Mon, 4 Apr 2022 14:58:32 +0200
Subject: [PATCH] std in api response (#32)

---
 setup.cfg                                 | 2 +-
 src/epstats/server/res.py                 | 7 +++++++
 tests/epstats/server/test_api_evaluate.py | 1 +
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/setup.cfg b/setup.cfg
index bbb05e3..b0cbe21 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = ep-stats
-version = 1.1.2
+version = 1.2.0
 description = Statistical package to evaluate ab tests in experimentation platform.
 long_description = file: README.md
 long_description_content_type = text/markdown
diff --git a/src/epstats/server/res.py b/src/epstats/server/res.py
index d37ea23..32fdb59 100644
--- a/src/epstats/server/res.py
+++ b/src/epstats/server/res.py
@@ -22,6 +22,9 @@ class MetricStat(BaseModel):
         description="""Nominator and denominator to calculate the mean
         are given in metric definition. `mean = nominator / denominator`.""",
     )
+    std: float = Field(
+        title="Metric Standard Deviation",
+    )
     sum_value: float = Field(
         title="Metric Value",
         description="""Value of the metric, it is given by the
@@ -54,6 +57,7 @@ def from_df(df: pd.DataFrame):
                 exp_variant_id=r["exp_variant_id"],
                 diff=r["diff"],
                 mean=r["mean"],
+                std=r["std"],
                 sum_value=r["sum_value"],
                 p_value=r["p_value"],
                 confidence_interval=r["confidence_interval"],
@@ -209,6 +213,7 @@ class Config:
                                 "exp_variant_id": "a",
                                 "diff": 0,
                                 "mean": 0.23809523809523808,
+                                "std": 2.1,
                                 "sum_value": 5,
                                 "p_value": 1,
                                 "confidence_interval": 1.1432928868841614,
@@ -218,6 +223,7 @@ class Config:
                                 "exp_variant_id": "b",
                                 "diff": 0.13076923076923078,
                                 "mean": 0.2692307692307692,
+                                "std": 1.422,
                                 "sum_value": 7,
                                 "p_value": 1,
                                 "confidence_interval": 1.2327467657322932,
@@ -227,6 +233,7 @@ class Config:
                                 "exp_variant_id": "c",
                                 "diff": 0.26,
                                 "mean": 0.3,
+                                "std": 0.232,
                                 "sum_value": 9,
                                 "p_value": 1,
                                 "confidence_interval": 1.352808784877644,
diff --git a/tests/epstats/server/test_api_evaluate.py b/tests/epstats/server/test_api_evaluate.py
index b244f60..f60f64a 100644
--- a/tests/epstats/server/test_api_evaluate.py
+++ b/tests/epstats/server/test_api_evaluate.py
@@ -283,6 +283,7 @@ def assert_experiment(target, test_dao: TestDao, expected_metrics: int, expected
             "exp_variant_id": [],
             "diff": [],
             "mean": [],
+            "std": [],
             "sum_value": [],
             "p_value": [],
             "confidence_interval": [],