[英]How to calculate percentages inside nested dictionaries in Python
I have two dictionaries:我有两个字典:
fruit = {'apple':15, 'mango':12, 'banana':16, 'kiwi':24}
people = {'sam':{'mango':3,'kiwi':12},
'joy':{'apple':9, 'banana':10, 'kiwi':14},
'bob':{'mango':8, 'apple':10, 'banana':12}}
For every key in the People dictionary, I want to calculate the percentage of values(fruits count) based on the fruit dictionary broken down by individual fruits and all fruits combined.对于 People 字典中的每个键,我想根据按单个水果和所有水果组合的水果字典计算值的百分比(水果计数)。
This is how the calculation is: {'sam':{'mango':3/12 = 0.25,'kiwi':12/24 = 0.5, 'total': (3+12)/(12+24) = 0.41}计算方式如下: {'sam':{'mango':3/12 = 0.25,'kiwi':12/24 = 0.5, 'total': (3+12)/(12+24) = 0.41 }
Finally, my output should look like this:最后,我的 output 应该是这样的:
people = {'sam':{'mango':0.25,'kiwi':0.5, 'total':0.41},
'joy':{'apple':0.6, 'banana':0.625, 'kiwi':0.58, 'total':0.6},
'bob':{'mango':0.66, 'apple':0.66, 'banana':0.75, 'total':0.69}}
Can anyone help me how to calculate this?谁能帮我计算一下?
You can use a loop, collect the numerator and denominator sums for the grand total and update each value:您可以使用循环,收集总计的分子和分母总和并更新每个值:
for d in people.values():
num = denom = 0
for k,v in d.items():
num += v # sum values for total
denom += fruit[k]
d[k] = round(v/fruit[k],2)
d['total'] = round(num/denom,2)
NB.注意。 I'm assuming here that all keys exist in
fruit
.我在这里假设所有键都存在于
fruit
中。 If this in not guaranteed use the get
method with a default value.如果这不能保证,请使用带有默认值的
get
方法。
Output: Output:
{'sam': {'mango': 0.25, 'kiwi': 0.5, 'total': 0.42},
'joy': {'apple': 0.6, 'banana': 0.62, 'kiwi': 0.58, 'total': 0.6},
'bob': {'mango': 0.67, 'apple': 0.67, 'banana': 0.75, 'total': 0.7}}
Try:尝试:
fruit = {"apple": 15, "mango": 12, "banana": 16, "kiwi": 24}
people = {
"sam": {"mango": 3, "kiwi": 12},
"joy": {"apple": 9, "banana": 10, "kiwi": 14},
"bob": {"mango": 8, "apple": 10, "banana": 12},
}
out = {
k: {
**{f: amount / fruit[f] for f, amount in v.items()},
"total": sum(v.values()) / sum(fruit[f] for f in v),
}
for k, v in people.items()
}
print(out)
Prints:印刷:
{
"sam": {"mango": 0.25, "kiwi": 0.5, "total": 0.4166666666666667},
"joy": {
"apple": 0.6,
"banana": 0.625,
"kiwi": 0.5833333333333334,
"total": 0.6,
},
"bob": {
"mango": 0.6666666666666666,
"apple": 0.6666666666666666,
"banana": 0.75,
"total": 0.6976744186046512,
},
}
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