Problème python
Bonjour,
je dois créer une liste (a new list containing only restaurants matching all the given constraints) de restaurant a partir de ca :
{
'name': 'Garibaldi', # Name of the restaurant
'year': 2018, # Awarded year
'latitude': 1.296564, # Its location (North-South)
'longitude': 103.855, # Its location (East-West)
'city': 'Singapore', # City name
'region': 'Singapore', # State or country
'zipCode': 'n/a', # Postal code
'cuisine': 'Italian', # Style
'price': '$', # Price range (from $ to $$$$$)
'url': 'https://guide.michelin.com/sg/en/singapore-region/singapore/restaurant/garibaldi',
# URL of page in online Michelin guide
'stars': 1 # Stars awarded by Michelin (from 1 to 3)
}
et ca
if __name__ == '__main__': # Do not modify or remove this line!
all_restaurants = get_michelin_restaurants()
get_michelin_restaurants =
# Your restaurant is in Bangkok and you want to know who else serves Innovative or Thai types of cuisine:
similar_restaurants = filter_list(all_restaurants, ['Innovative', 'Thai'], 2)
# Print the results:
print("Number of 2-star (or better) restaurants in Bangkok serving Innovative or Thai cuisine:", len(similar_restaurants), "(expected answer: 2)")
print("\nThis is the list produced by your code:")
print_restaurants(similar_restaurants, ['name', 'cuisine', 'stars'])
print("This is the expected list:")
print_restaurants([{'name':'Gaggan', 'cuisine': 'Innovative', 'stars': 2},
{'name':'Mezzaluna', 'cuisine': 'Innovative', 'stars': 2}], ['name', 'cuisine', 'stars'])
Je n'y arrive pas du tout, quelqu'un a une idée ?
je dois créer une liste (a new list containing only restaurants matching all the given constraints) de restaurant a partir de ca :
{
'name': 'Garibaldi', # Name of the restaurant
'year': 2018, # Awarded year
'latitude': 1.296564, # Its location (North-South)
'longitude': 103.855, # Its location (East-West)
'city': 'Singapore', # City name
'region': 'Singapore', # State or country
'zipCode': 'n/a', # Postal code
'cuisine': 'Italian', # Style
'price': '$', # Price range (from $ to $$$$$)
'url': 'https://guide.michelin.com/sg/en/singapore-region/singapore/restaurant/garibaldi',
# URL of page in online Michelin guide
'stars': 1 # Stars awarded by Michelin (from 1 to 3)
}
et ca
if __name__ == '__main__': # Do not modify or remove this line!
all_restaurants = get_michelin_restaurants()
get_michelin_restaurants =
# Your restaurant is in Bangkok and you want to know who else serves Innovative or Thai types of cuisine:
similar_restaurants = filter_list(all_restaurants, ['Innovative', 'Thai'], 2)
# Print the results:
print("Number of 2-star (or better) restaurants in Bangkok serving Innovative or Thai cuisine:", len(similar_restaurants), "(expected answer: 2)")
print("\nThis is the list produced by your code:")
print_restaurants(similar_restaurants, ['name', 'cuisine', 'stars'])
print("This is the expected list:")
print_restaurants([{'name':'Gaggan', 'cuisine': 'Innovative', 'stars': 2},
{'name':'Mezzaluna', 'cuisine': 'Innovative', 'stars': 2}], ['name', 'cuisine', 'stars'])
Je n'y arrive pas du tout, quelqu'un a une idée ?
1 réponse
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Contributeur
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Mon problème est que je ne comprends pas ce que c'est un len() ni comment défénir ma fonction ni pourquoi j'aurai une expected answer...
if __name__ == '__main__': # Do not modify or remove this line!
all_restaurants = get_michelin_restaurants()
# Your restaurant is in Bangkok and you want to know who else serves Innovative or Thai types of cuisine:
similar_restaurants = filter_list(all_restaurants, ['Innovative', 'Thai'], 2)
# Print the results:
print("Number of 2-star (or better) restaurants in Bangkok serving Innovative or Thai cuisine:", len(similar_restaurants), "(expected answer: 2)")
print("\nThis is the list produced by your code:")
print_restaurants(similar_restaurants, ['name', 'cuisine', 'stars'])
print("This is the expected list:")
print_restaurants([{'name':'Gaggan', 'cuisine': 'Innovative', 'stars': 2},
{'name':'Mezzaluna', 'cuisine': 'Innovative', 'stars': 2}], ['name', 'cuisine', 'stars'])
voila ce que j'ai dans ma console
TypeError Traceback (most recent call last)
<ipython-input-19-2ba75c5bbe7f> in <module>()
7
8 # Print the results:
----> 9 print("Number of 2-star (or better) restaurants in Bangkok serving Innovative or Thai cuisine:", len(similar_restaurants), "(expected answer: 2)")
10 print("\nThis is the list produced by your code:")
11 print_restaurants(similar_restaurants, ['name', 'cuisine', 'stars'])
TypeError: object of type 'NoneType' has no len()
si vous pouviez me donner une idée de par où commencer... -
@kuskus2022j'ai réussi cette partie deja
def print_restaurants(dict_list, key_list=None, max_items=-1):
# Prints a tabulated list of dictionaries line by line, each value on its own column.
# Argument key_list gives the keys for which the values shall be printed (default is all keys).
# Argument max_items is the maximal number of items to print (default is unlimited).
column_width = 20
# Stop here if the list is empty:
if len(dict_list) == 0:
return
# If no keys are specified, take those found in the first dictionary of the list:
if key_list is None:
key_list = dict_list[0].keys()
# Print a header line consisting of uppercase keys:
header = "\n"
for key in key_list:
header += str(key) + (' '*(column_width-len(str(key))))
print(header.upper())
# Print the values of the specified keys, nicely formatted by columns:
for dico in dict_list:
line = ''
for key in key_list:
value = str(dico[key])[:column_width-2]
line += value + (' '*(column_width-len(value)))
print(line)
max_items -= 1
if max_items == 0:
break
print() -
Contributeur@kuskus2022as-tu lu les explications que je t'ai donné à propos de l'utilisation des balises de code?
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Contributeur@kuskus2022à propos de len(): https://docs.python.org/fr/3/library/functions.html#len
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