Python：打开文件读取后没有输出

Question

我有一个python脚本，它拆分Icinga GUI命令并将特定命令发送到卫星主机。

你知道吗 这个脚本完成了它的目的，但是我遇到了两个问题：
第一：我没有在第16行（“cgi\u cmd=open（cgi\u cmd\u file，'r'）”之后得到调试输出
第二：脚本使用了高达100%的CPU，即使每次获取空行时都应该暂停5秒。
你知道吗

我需要一些帮助，谢谢！你知道吗

编辑：已解决

我的第一个问题与命名管道的工作方式有关。只有先打开它进行写入时，才能打开它进行读取。
第二个问题是我检查回路内部线路的方式，多亏了彼得·伍德。

#!/usr/bin/python
import string, os, sys, re, spur, logging

logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s')
logging.debug('Imports done.')

# Define files and open
cgi_cmd_file = '/var/spool/icinga/cmd/cgi.cmd'
icinga_cmd_file = '/var/spool/icinga/cmd/icinga.cmd'
icinga_log_file = '/var/log/icinga/iscrdr_collector.log'
sat_log_file = '/var/log/icinga/iscrdr_satelite.log'

logging.debug('Files defined.')

cgi_cmd = open(cgi_cmd_file, 'r')
icinga_cmd = open(icinga_cmd_file, 'w')

logging.debug('Files opened.')

# Compile regex pattern for reschedule service and host checks
pattern = re.compile('SCHEDULE_.*_.*_CHECK.+?\d{10}')

logging.debug('Regex pattern compiled.')

# List of satelite hosts
satelite_hosts = [
    ['hostname','user','pw'],
    ['hostname','user','pw'],
    ['hostname','user','pw'],
]

logging.debug('Satelite hosts defined.')

#
# Code Area
#
def send_to_sat(message):
    command = "/bin/echo '" + string.strip(message) + "' > /var/spool/icinga/cmd/icinga.cmd"
    for i in satelite_hosts:
        shell = spur.SshShell(hostname=i[0], username=i[1], password=i[2])
        with shell:
            result = shell.run(["sh", "-c", command])
        logging.debug('Command send to' + i[0] + '.')
    with open(sat_log_file, 'a') as sat_log:
        sat_log.write(string.strip(message + str(result.return_code)) + "\n")

def send_to_icinga(message):
    with open(icinga_cmd_file, 'w') as icinga_cmd:
         icinga_cmd.write(string.strip(message) + "\n")
    with open(icinga_log_file, 'a') as icinga_log:
         icinga_log.write(string.strip(message) + "\n")
    logging.debug('Command send to Icinga.')

# Split reschedule commands from command stream and write them to file
while True:
    logging.debug('This is a loop run.')
    line = cgi_cmd.readline()
    if re.findall(r'SCHEDULE_.*_.*_CHECK.+?\d{10}', line):
        send_to_sat(line)
    elif line != '':
        send_to_icinga(line)
    else:
        logging.debug('No Command.')
        time.sleep(5)
        continue