import unittest
import importlib
import numpy as np
import pandas as pd


def _dynamic_test(test_case, condition, success_message, failure_message):
    if condition:
        test_case._testMethodName = success_message
        test_case.assertTrue(True, success_message)
    else:
        test_case._testMethodName = failure_message
        test_case.fail(failure_message)


class TestUserCode(unittest.TestCase):

    def test_age_column_has_no_missing_values(self):
        import user_code

        variable = 'data'
        actual_df = getattr(user_code, variable, None)
        condition = False
        if actual_df is None:
            failure_message = f"The `{variable}` variable is not declared."
        elif not isinstance(actual_df, pd.DataFrame):
            failure_message = f"`{variable}` is not a `DataFrame`."
        elif actual_df.empty:
            failure_message = f"`{variable}` is empty."
        elif 'Age' not in actual_df.columns:
            failure_message = f"`{variable}` has no 'Age' column."
        elif not actual_df['Age'].isnull().any():
            condition = True
            failure_message = None
        else:
            null_count = actual_df['Age'].isnull().sum()
            failure_message = f"Expected the 'Age' column to contain no missing values, but got `{null_count}`."

        _dynamic_test(
            self,
            condition,
            "The 'Age' column contains no missing values.",
            failure_message
        )

    def test_missing_values_are_replaced_correctly(self):
        import user_code

        expected_value = pd.Series([25, 30, 30, 35, 30]).astype(float)

        variable = 'data'
        actual_df = getattr(user_code, variable, None)
        condition = False
        if actual_df is None:
            failure_message = f"The `{variable}` variable is not declared."
        elif not isinstance(actual_df, pd.DataFrame):
            failure_message = f"`{variable}` is not a `DataFrame`."
        elif actual_df.empty:
            failure_message = f"`{variable}` is empty."
        elif 'Age' not in actual_df.columns:
            failure_message = f"`{variable}` has no 'Age' column."
        elif actual_df['Age'].equals(expected_value):
            condition = True
            failure_message = None
        else:
            failure_message = f"Expected `{variable}['Age']` to contain `{expected_value.values}`, but got `{actual_df['Age'].values}`."

        _dynamic_test(
            self,
            condition,
            "The missing values in the 'Age' column are correctly replaced with the mean.",
            failure_message
        )

    def test_city_encoder_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'city_encoder'),
            "The `city_encoder` variable is declared.",
            "Expected `city_encoder` to be declared."
        )

    def test_city_encoder_is_onehotencoder(self):
        import user_code
        from sklearn.preprocessing import OneHotEncoder

        try:
            condition = isinstance(user_code.city_encoder, OneHotEncoder)
            failure_message = f"Expected `city_encoder` to be an instance of `OneHotEncoder`, but got `{type(user_code.city_encoder).__name__}`."
        except AttributeError:
            condition = False
            failure_message = "The `city_encoder` variable is not declared."

        _dynamic_test(
            self,
            condition,
            "The `city_encoder` is an instance of `OneHotEncoder`.",
            failure_message
        )

    def test_city_encoded_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'city_encoded'),
            "The `city_encoded` variable is declared.",
            "Expected `city_encoded` to be declared."
        )

    def test_city_encoded_is_correct(self):
        import user_code
        from sklearn.preprocessing import OneHotEncoder
        from scipy.sparse import csr_matrix

        data = pd.DataFrame({
            'Age': [25, np.nan, 30, 35, np.nan],
            'City': ['New York', 'London', 'Paris', 'Berlin', 'London'],
            'Income': ['Low', 'Middle', 'High', 'High', 'Middle']
        })

        city_encoder = OneHotEncoder(drop='first')
        expected_value = city_encoder.fit_transform(data[['City']]).toarray()

        variable = 'city_encoded'
        actual_value = getattr(user_code, variable, None)
        condition = False
        if actual_value is None:
            failure_message = f"The `{variable}` variable is not declared."
        elif not isinstance(actual_value, csr_matrix):
            failure_message = f"`{variable}` is not a `scipy.sparse.csr_matrix`."
        elif not actual_value.size:
            failure_message = f"`{variable}` is empty."
        elif np.array_equal(actual_value.toarray(), expected_value):
            condition = True
            failure_message = None
        else:
            failure_message = f"Expected `{variable}` to contain `{expected_value}`, but got `{actual_value.toarray()}`."

        _dynamic_test(
            self,
            condition,
            f"The 'City' column is encoded correctly.",
            failure_message
        )

    def test_income_encoder_is_declared(self):
        import user_code
        _dynamic_test(
            self,
            hasattr(user_code, 'income_encoder'),
            "The `income_encoder` variable is declared.",
            "Expected `income_encoder` to be declared."
        )

    def test_income_encoder_is_ordinalencoder(self):
        import user_code
        from sklearn.preprocessing import OrdinalEncoder

        try:
            condition = isinstance(user_code.income_encoder, OrdinalEncoder)
            failure_message = f"Expected `income_encoder` to be an instance of `OrdinalEncoder`, but got `{type(user_code.income_encoder).__name__}`."
        except AttributeError:
            condition = False
            failure_message = "The `income_encoder` variable is not declared."

        _dynamic_test(
            self,
            condition,
            "The `income_encoder` is an instance of `OrdinalEncoder`.",
            failure_message
        )

    def test_income_column_is_encoded_correctly(self):
        import user_code

        expected_value = pd.Series([0, 1, 2, 2, 1]).astype(float)

        variable = 'data'
        actual_df = getattr(user_code, variable, None)
        condition = False
        if actual_df is None:
            failure_message = f"The `{variable}` variable is not declared."
        elif not isinstance(actual_df, pd.DataFrame):
            failure_message = f"`{variable}` is not a `DataFrame`."
        elif actual_df.empty:
            failure_message = f"`{variable}` is empty."
        elif 'Income' not in actual_df.columns:
            failure_message = f"`{variable}` has no 'Income' column."
        elif actual_df['Income'].equals(expected_value):
            condition = True
            failure_message = None
        else:
            failure_message = f"Expected `{variable}['Income']` to contain `{expected_value.values}`, but got `{actual_df['Income'].values}`."

        _dynamic_test(
            self,
            condition,
            "The 'Income' column is encoded correctly.",
            failure_message
        )


if __name__ == '__main__':
    unittest.main()


test_main.py

Entdecken Sie die Kraft verborgener Muster mit unüberwachtem Lernen. Beherrschen Sie die einflussreichsten Clustering-Algorithmen, darunter K-Means, hierarchisches Clustering, DBSCAN und Gaußsche Mischmodelle. Lernen Sie, die Clusterqualität mit WSS- und Silhouette-Werten zu bewerten, verschiedene Distanzmaße zu handhaben und robuste Lösungen auf realen Datensätzen zu implementieren. Entwickeln Sie Fähigkeiten zur Kundensegmentierung und zur Entdeckung von Strukturen in nicht gelabelten Daten mit Scikit-learn.

Herausforderung: Vorverarbeitung des Datensatzes

Lösung

Herausforderung: Vorverarbeitung des Datensatzes

Lösung