Question

尽管有Monkey.patch_all（），调用内置的 open（）或 pandas.read_csv（）似乎也会阻止对我的烧瓶+ gevent wsgi网络服务器的所有其他请求。我是否需要调用特殊的gevent io函数以使其不阻塞？

from gevent import monkey, pywsgi, sleep
monkey.patch_all()
import pandas as pd
from flask import Flask
app = Flask(__name__)

FILENAME = 'c:/temp/testcsv.csv'

@app.route('/')
def fastresult():
    return 'this should return immediately'

@app.route('/non_blocking_sleep')
def non_blocking_sleep():
    sleep(10)
    return 'using gevent.sleep does NOT block other reqeusts as expected'

@app.route('/readcsv')
def readcsv(): 
    """
    this blocks any other request before the read completes
    """
    df = pd.read_csv(FILENAME)
    return df.info()


@app.route('/openfile')
def openfile():
    """
    this blocks any other request before the read completes
    """
    with open(FILENAME, 'r') as file:
        res = file.readlines()
    return res[:1000]

http_server = pywsgi.WSGIServer(('', 5000), app)
http_server.serve_forever()

在Windows和Linux上的64位Anaconda 5.3（python 3.7）上进行了测试。

烧瓶+ gevent pywsgi阻止熊猫和内置io

0 个答案: