文件词典：价值是其中的关键是重复的字典

Question

我打开包含文件此：

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 

，我想输出的字典是这样的：

{'milk': {'vladimirputin': 2.87}, 'cereal': {'barakobama': 9.21}, 
'bread': {'vladimirputin': 0.66}, 'potatoes': {'barakobama': 2.67}, 
'sugar': {'barakobama': 1.98}, 'parsley': {'vladimirputin': 1.33, 

我已经做到了这一点：

C={} 
file=open(fileNameStr,'r') 


for line in file: 
    if line[0].isdigit(): 
     fields = line.split() 

Answer 1

c = {} 
f = open(fileNameStr) 
for line in f: 
    if not line[0].isdigit(): continue 
    transactionNo, _date, customerId, purchasePairs = line.split() 
    for pair in purchasePairs.split(','): 
     productName, price = pair.split(':') 
     if productName in c: 
      c[productName][customerId] = float(price) 
     else: 
      c[productName] = {customerId: float(price)} 

你必须处理无线网络第一个关联：那就是客户多次购买同一件东西。 希望这段代码会有所帮助。

Answer 2

#!/usr/bin/python3 

final_products = dict() 

file_name = "myfile" 
try: 
    # it's better not to use reserved name like 'file' 
    # fhd, for example, is better 
    # you might want to remove encoding='utf-8' depending on your python version (2 or 3) : 
    fhd = open(file_name, 'rt', encoding='utf-8') 
except: 
    # here we cannot read the file 
    raise 
else: 
    # ok, file is opened 
    for line in fhd: 
     if line[0].isdigit(): 
      fields = line.split() 
      # there should be exactly 4 fields 
      if len(fields) == 4: 
       products  = fields[3].split(',') 
       consumer  = fields[2] 
       for p in products: 
        product_details = p.split(':') 
        if len(product_details) == 2: 
         product_name  = product_details[0] 
         product_quantity = float(product_details[1]) 
         # first we check if the product is in the dict 
         # if not we add it 
         if product_name not in final_products.keys(): 
          final_products[product_name] = dict() 
         # does the consumer already bought this product ? 
         if consumer not in final_products[product_name].keys(): 
          final_products[product_name][consumer] = 0.0 
         # finaly we add the quantity bought by the consumer 
         final_products[product_name][consumer] += product_quantity 
    # close the file 
    fhd.close 

print(final_products) 

此打印：

{'cereal': {'barakobama': 9.21}, 'potatoes': {'barakobama': 2.67}, 'parsley': {'vladimirputin': 1.33, 'barakobama': 0.76}, 'sugar': {'barakobama': 1.98}, 'crisps': {'barakobama': 1.09}, 'milk': {'vladimirputin': 2.87}, 'bread': {'vladimirputin': 0.66}}