擅长:python、mysql、java
<p>目前,您的代码正在为for循环的每次迭代创建一个新字典。如果字典的每个值都是一个列表,则可以通过以下键将其附加到该列表:</p>
<pre><code>with open(input_path,'rU') as csvfile:
reader = csv.DictReader(csvfile)
user_dictionary = {"first_name":["name1, "name2", ...], "last_name":["name3", name4", ....]}
for row in reader:
if row['first_name'] not in user_dictionary['first_name'] and not in row['last_name'] not in user_dictionary['last_name']:
user_dictionary["first_name"].append(row['first_name'])
user_dictionary['last_name'].append(row['last_name'])
</code></pre>