将结果存储在变量中：

def get_request(user):
    with open('friends_req.csv') as d:
        reader = csv.reader(d)
        results = [row[0] for row in reader if row[1] == user]
        if results:
            print(f'You have friends request from {", ".join(results)}')
        else:
            print("No request found for this user")
        return results

输出：

>>> res = get_request('user')
You have friends request from u, g

>>> res
['u', 'g']

friends_req.csv：

u,user
g,user

你可以试试这个：

def get_request(user):
    if not os.path.exists('friends_req.csv'):
        open('friends_req.csv','w').close()
    requests = []
    with open('friends_req.csv','r+') as d:
        reader = csv.reader(d)
        for row in reader:
            if row[1] == user:
                requests.append(row[0])
    if len(requests) > 0:
        for request in requests:
            print(f'You have a friend request from {request}')
    else:
        print("No request found for this user")

对于如此琐碎的事情，您不需要 csv 模块，只需执行以下操作：

FILENAME = 'friends_req.csv'

def get_request(filename, user):
    requests = []
    try:
        with open(filename) as data:
            for line in map(str.strip, data):
                f, u = line.split(',')
                if u == user:
                    requests.append(f)
    except FileNotFoundError:
        pass
    return requests

print(get_request(FILENAME, 'user'))