我想是以下結構:y['1'][tuple(list)] = val
作爲一個Python嵌套字典,但同時,我努力,我得到KeyError
:在csv文件嵌套字典蟒蛇鍵
的數據是這樣的:
Rest_id, rates, items
1,4, burger
1,8, tofu_log
2,5, burger
2,8.5, tofu_log
3,4, chef_salad
3,8, steak_salad_sandwich
4,5, steak_salad_sandwich,salad
4,2.5, wine_spritzer
5,4, extreme_fajita3,test2,test4,test
5,8, fancy_european_water
6,5, fancy_european_water
6,6, extreme_fajita, jalapeno_poppers, extra_salsa
7,1.5, wine_spritzer
7,5, extreme_fajita, jalapeno_poppers
以下是代碼:
y = defaultdict(dict)
with open('sample_data_tested_with.csv','r') as f:
reader = csv.reader(f, delimiter=',', quoting=csv.QUOTE_NONE)
reader = [[x.strip() for x in row] for row in reader]
for i in reader:
#cd[i[0]] = {tuple(i[2:]):i[1]}
#cd[i[0]][tuple(i[2:])].update(i[1])
print i[0], i[1], tuple(i[2:])
y[i[0]][tuple(i[2:])].append(i[1])
後來我想在這樣的y['rest_id']['item']
字典搜索並找到該利率。 在此先感謝。
從IPython的完整的堆棧:
In [49]: with open('sample_data_tested_with.csv','r') as f:
reader = csv.reader(f, delimiter=',', quoting=csv.QUOTE_NONE)
reader = [[x.strip() for x in row] for row in reader]
for i in reader:
#cd[i[0]] = {tuple(i[2:]):i[1]}
#cd[i[0]][tuple(i[2:])].update(i[1])
print i[0], i[1], tuple(i[2:])
#x[tuple(i[2:])]=float(i[1])
y[i[0]][tuple(i[2:])].append(i[1])
....:
1 4 ('burger',)
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
<ipython-input-49-ab608c2dc33a> in <module>()
7 print i[0], i[1], tuple(i[2:])
8 #x[tuple(i[2:])]=float(i[1])
----> 9 y[i[0]][tuple(i[2:])].append(i[1])
10
KeyError: ('burger',)
我能有Y = defaultdict(列表)和追加數據,但隨後林不能夠基於諸如鍵搜索數據:Y [「rest_id」] [「項目」] –