[英]How to read every column of a csv file in python after every 10-15 rows which have the same header using pandas or csv?
[英]Flask shutdown after working 10-15 sec
我正在使用pymessenger的包装器开发一个 python messenger Bot。 它在本地工作,但在生产中它会中断。就像每一秒都有 15-20 个请求。 我正在使用 Pm2 在关闭/关闭时重新启动进程。 当我启动应用程序时,它运行了 10-20 秒,按预期工作,但突然显示该错误并重新启动。 如果有人能帮助我,我将不胜感激。
这是代码:
# encoding=utf8
import sys
reload(sys)
sys.setdefaultencoding('utf8')
import os
import emoji
from flask import Flask, request
from pymessenger.bot import Bot
app = Flask(__name__)
bot = Bot(ACCESS_TOKEN)
@app.route("/webhook", methods=['GET', 'POST'])
def hello():
if request.method == 'GET':
if request.args.get("hub.verify_token") == VERIFY_TOKEN:
return request.args.get("hub.challenge")
else:
return 'Invalid verification token'
try:
if request.method == 'POST':
output = request.get_json()
for event in output['entry']:
if event.get("messaging"):
messaging = event['messaging']
for x in messaging:
if x.get('message'):
recipient_id = x['sender']['id']
if x['message'].get('text'):
message = emoji.demojize(x['message']['text'])
#-----------------------some other code ------------------
#-------------------------------------------------------
bot.send_text_message(
recipient_id, "replay")
if x['message'].get('attachments'):
bot.send_text_message(
recipient_id, "No result!!")
else:
pass
return "Success"
return "Success"
except IOError as (errno, strerror):
print "I/O error({0}): {1}".format(errno, strerror)
except ValueError:
print "Could not convert data to an integer."
except:
print "Unexpected error:", sys.exc_info()[0]
raise
if __name__ == "__main__":
app.run(port=5000, debug=False)
我不是 Python 开发人员,只是将它用于我在其他平台上找不到的 Messenger Bot 库。
这是错误日志:
File "/usr/lib/python2.7/SocketServer.py", line 290, in _handle_request_noblock
self.process_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 318, in process_request
self.finish_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 331, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/lib/python2.7/SocketServer.py", line 654, in __init__
self.finish()
File "/usr/lib/python2.7/SocketServer.py", line 713, in finish
self.wfile.close()
File "/usr/lib/python2.7/socket.py", line 283, in close
self.flush()
File "/usr/lib/python2.7/socket.py", line 307, in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
socket.error: [Errno 32] Broken pipe
使用Gunicorn和 Flask 来管理 WSGI 请求。 下面是一些小脚本,它们可以帮助您启动和停止与 Gunicorn 一起运行的 Flask 服务器。 Flask 的内置服务器并非用于生产。 它会随着时间而崩溃。 因此,看看 Gunicorn:
启动脚本:
#!/bin/bash
stat=0
COUNTER=0
swait()
{
echo -ne "Waiting for service to start"
until [[ $stat -ge 1 ]]
do
stat=$(netstat -lnt | awk '$4 ~ /:5001$/' |wc -l)
COUNTER=$((COUNTER+1))
if [ $COUNTER == 5 ] ; then
echo -e '\nError-Service start failed'
exit;
fi
echo -ne "."
sleep 2
done
}
service_start()
{
echo "Starting Service"
/<project_path>/venv/bin/gunicorn --reload -b 0.0.0.0:5001 api:app --access-logfile=/var/log/<project_name>.log --error-logfile=/var/log/<project_name>_error.log -D -w 2 --access-logformat='%(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s" %(L)s' --log-level=info
}
service_start
swait
echo -e "\nService started Successfully"
停止脚本
#!/bin/bash
echo "Stopping Service"
stat=1
COUNTER=0
swait()
{
echo -ne "Waiting for service to stop"
until [[ $stat -eq 0 ]]
do
stat=$(netstat -lnt | awk '$4 ~ /:5001$/' |wc -l)
COUNTER=$((COUNTER+1))
if [ $COUNTER == 8 ] ; then
echo -e '\nService stop failed'
exit;
fi
echo -ne "."
sleep 2
done
}
service_stop()
{
for pid in `ps augx | grep gunicorn | grep -E ':5001' | grep -v grep | awk '{print $2}'`;
do
echo "Killing PID" $pid
kill $pid
done
}
service_stop
swait
echo -e "\nService Stopped Successfully"
您可以将 Waitress 与 Flask 一起使用,Flash 是仅用于测试的基本 WSGI 服务
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