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New create empty observable function (issue 386) #387

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Mar 16, 2020
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Merged

New create empty observable function (issue 386) #387

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a792954
resolves #386
MerktSimon Mar 16, 2020
398a1cf
test for #386
MerktSimon Mar 16, 2020
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12 changes: 12 additions & 0 deletions petab/observables.py
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Original file line number Diff line number Diff line change
Expand Up @@ -150,3 +150,15 @@ def get_placeholders(observable_df: pd.DataFrame) -> List[str]:
row[formula_column], row.name, placeholder_type)
placeholders.extend(cur_placeholders)
return core.unique_preserve_order(placeholders)


def create_observable_df() -> pd.DataFrame:
"""Create empty observable dataframe

Returns:
Created DataFrame
"""

df = pd.DataFrame(data={col: [] for col in OBSERVABLE_DF_COLS})

return df
6 changes: 6 additions & 0 deletions tests/test_observables.py
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Expand Up @@ -127,6 +127,12 @@ def test_get_formula_placeholders():
assert petab.get_formula_placeholders(1, 'any', 'observable') == []


def test_create_observable_df():
"""Test observables.create_measurement_df."""
df = petab.create_observable_df()
assert set(df.columns.values) == set(OBSERVABLE_DF_COLS)


def test_get_placeholders():
"""Test get_placeholders"""
observable_df = pd.DataFrame(data={
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