csv data cannot be read When I read the csv file using a single machine distributed

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class CSVDictReader(Iterator[Dict]):

def __init__(self, file, **kwargs):
    try:
        file = open(file)
    except TypeError:
        pass
    self.file = file
    self.reader = csv.DictReader(file, **kwargs)

def __next__(self):
    try:
        return next(self.reader)
    except StopIteration:
        self.file.seek(0, 0)
        next(self.reader)
        return next(self.reader)

当我使用单机分布式 读取csv 文件, 会出现csv数据读取不到的现象, csv的文件大小5MB左右

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When I read the csv file using a single machine distributed, the phenomenon that the csv data cannot be read, the size of the csv file is about 5MB

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from locust_plugins.csvreader import CSVDictReader
from locust import HttpUser, task

ssn_reader = CSVDictReader("ssn.csv")

class MyUser(HttpUser):
@task
def index(self):
customer = next(ssn_reader)
print(customer)
self.client.get(f"/?ssn={customer[0]}")

host = "http://example.com"

 when i use  locust -f locustfile.py --processes -1 start  this ssn_reader content is error