在循環兩次後創建新的字典

Question

我試圖清理一個csv文件的內容，然後創建一個新的字典。我想新的字典，在全球範圍內提供：

import csv 

input_file = csv.DictReader(open("test_file3.csv")) 

final_dict = {} #this should get filled with the new dictionary 

for row in input_file: #cleaning the dictionary 

    new_dict = {} 

    for key, value in row.items(): 
     if key == "Start Date": 
      new_dict[key] = value 
     else: 
      first_replace = value.replace(".", "") 
      second_replace = first_replace.replace(",", ".") 
      all_replaced = second_replace.replace(" €", "") 
      new_dict[key] = all_replaced 

它的工作原理的第一循環中，但我不知道怎麼弄的字典下new_dict到final_dict

理想我想final_dict = new_dict。

Answer 1

你並不需要創建一個new_dict您for循環內，只需訪問final_dict裏面：

final_dict = {} 

for row in input_file: 

    for key, value in row.items(): 
     if key == "Start Date": 
      final_dict[key] = value 
     else: 
      first_replace = value.replace(".", "") 
      second_replace = first_replace.replace(",", ".") 
      all_replaced = second_replace.replace(" €", "") 
      final_dict[key] = all_replaced 

print final_dict 

如果有與同一key多個條目，只有最後一個將被包含在final_dict 。