Completed bite 21

Author: cisco7507

days/07-09-data-structures/code/bite21/bite21.py

@@ -0,0 +1,58 @@
+'''
+From: https://codechalleng.es/bites/21/#console
+Given the provided cars dictionary:
+
+Get all Jeeps
+Get the first car of every manufacturer.
+Get all vehicles containing the string Trail in their names (should work for other grep too)
+Sort the models (values) alphabetically
+See the docstrings and tests for more details. Have fun!
+
+Update 18th of Sept 2018: as concluded in the forum it is better to pass the cars dict into each function to make its scope local.
+'''
+
+cars = {
+    'Ford': ['Falcon', 'Focus', 'Festiva', 'Fairlane'],
+    'Holden': ['Commodore', 'Captiva', 'Barina', 'Trailblazer'],
+    'Nissan': ['Maxima', 'Pulsar', '350Z', 'Navara'],
+    'Honda': ['Civic', 'Accord', 'Odyssey', 'Jazz'],
+    'Jeep': ['Grand Cherokee', 'Cherokee', 'Trailhawk', 'Trackhawk']
+}
+
+
+def get_all_jeeps(cars=cars):
+    """return a comma  + space (', ') separated string of jeep models
+       (original order)"""
+
+    return ', '.join([', '.join(models) for vendor, models in cars.items() if vendor == 'Jeep'])
+
+
+def get_first_model_each_manufacturer(cars=cars):
+    """return a list of matching models (original ordering)"""
+
+    return [models[0] for vendor, models in cars.items()]
+
+
+def get_all_matching_models(cars=cars, grep='trail'):
+    """return a list of all models containing the case insensitive
+       'grep' string which defaults to 'trail' for this exercise,
+       sort the resulting sequence alphabetically"""
+
+    return sorted([model for vendor, models in cars.items() for model in models if grep.lower() in model.lower()])
+
+
+def sort_car_models(cars=cars):
+    """return a copy of the cars dict with the car models (values)
+       sorted alphabetically"""
+
+    for vendor, models in cars.items():
+        models = sorted(models)
+        cars[vendor] = models
+    return cars
+
+
+if __name__ == '__main__':
+    print(get_all_jeeps(cars))
+    print(get_first_model_each_manufacturer(cars))
+    print(get_all_matching_models(cars, grep='CO'))
+    print(sort_car_models(cars))