如何使字符串到字典和更新存在的值? [英] How to make string to dictionary and update values that exist?
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问题描述
我打开一个包含以下内容的文件:
I open a file that contains this:
TransactionNo Date CustomerId PurchasePairs
------------- ---- ---------- -------------
1 09-04-2014 barakobama potatoes:2.67,sugar:1.98,cereal:5.99,crisps:1.09
2 11-04-2014 barakobama parsley:0.76,cereal:3.22
3 11-04-2014 vladimirputin bread:0.66,milk:2.87,parsley:1.33
我想要一个字典:
{'vladimirputin': {'milk': 2.87, 'parsley': 1.33, 'bread': 0.66},
'barakobama': {'parsley': 0.76, 'sugar': 1.98, 'crisps': 1.09,
'potatoes': 2.67, 'cereal': 9.21}}
我已经尝试过:
def makeCustomerDictionary(fileNameStr):
my_dict={}
file=open(fileNameStr,'r')
for line in file:
if line.isdigit():
line_split=line.split("\t")
customer_key=set(line_split[2])
问题是我不知道如何在barakobama的价值中添加产品谷物的价格。
The problem is I dont know how to add the price of product "cereal" at barakobama's value.
推荐答案
尝试这样:
#!/usr/bin/env python3
d = {}
with open("in.txt") as i:
header1 = i.readline()
header2 = i.readline()
for line in i:
fields = line.split()
d[fields[2]] = dict(item.split(":") for item in fields[3].split(","))
print(d)
输出:
{'vladimirputin': {'milk': '2.87', 'bread': '0.66', 'parsley': '1.33'}, 'barakobama': {'parsley': '0.76', 'cereal': '3.22'}}
如果您想要 float
,请将该行更改为:
If you want float
s, change the line to:
d[fields[2]] = dict((item.split(":")[0], float(item.split(":")[1])) for item in fields[3].split(","))
输出:
{'vladimirputin': {'milk': 2.87, 'parsley': 1.33, 'bread': 0.66}, 'barakobama': {'parsley': 0.76, 'cereal': 3.22}}
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