[英]Create a list of dictionaries in a dictionary from csv in Python
我有一个csv,看起来像这样:
Name;Category;Address
McFood;Fast Food;Street 1
BurgerEmperor;Fast Food;Way 1
BlueFrenchHorn;French;Street 12
PetesPizza;Italian;whatever
SubZero;Fast Food;Highway 6
我想制作一个以类别为键的字典,并以剩余数据作为值的字典列表。 所以它看起来像这样:
{'Fast Food' : [{'Name': 'McFood', 'Address': 'Street 1'},
{'Name': 'BurgerEmperor', 'Address': 'Way 1'}],
...],
'French' : [{'Name': 'BlueFrenchHorn', 'Address': 'Street12'}],
...}
(此处缩进以提高可读性)。
我像下面的代码片段一样尝试了一下,但是到那里我什么也没得到:
import csv
mydict={}
with open ('food.csv', 'r') as csvfile:
#sniff to find the format
fileDialect = csv.Sniffer().sniff(csvfile.read(1024))
csvfile.seek(0)
#read the CSV file into a dictionary
dictReader = csv.DictReader(csvfile, dialect=fileDialect)
for row in dictReader:
mycategory= row["Category"]
del row("Category")
mydict[mycategory]=row
import csv
from collections import defaultdict
mydict = defaultdict(list) # <---
with open ('food.csv', 'r') as csvfile:
fileDialect = csv.Sniffer().sniff(csvfile.read(1024))
csvfile.seek(0)
dictReader = csv.DictReader(csvfile, dialect=fileDialect)
for row in dictReader:
mycategory= row.pop("Category")
mydict[mycategory].append(row) # Will put a list for not-existing key
mydict = dict(mydict) # Convert back to a normal dictionary (optional)
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