Viewing file:  utils.py (1.45 KB) -rw-r--r--
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#!/usr/bin/python
# -*- coding: utf-8 -*-
import subprocess
class ExternalProgramFailed(Exception):
def __init__(self, message):
Exception.__init__(self, message)
def run_command(cmd, env_data=None):
"""
Runs external process and returns output
@param cmd: command and arguments as a list
@return: string
"""
cmd_line = ' '.join(cmd)
try:
output = subprocess.Popen(
cmd,
stdin=open('/dev/null'),
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
close_fds=True,
env=env_data)
except OSError, oserr:
raise ExternalProgramFailed('%s. Can not run command: %s' % (cmd_line, str(oserr)))
std_out, std_err = output.communicate()
if output.returncode != 0:
raise ExternalProgramFailed(std_err or 'output of the command: %s\n%s' % (cmd_line, std_out))
return std_out
def delete_line_from_file(path, line):
"""
Delete line from file. Return True when line(s) have been deleted, False otherwise (specified line is not found)
:param path: path to file
:type path: string
:param line: line to delete without EOL ('\n')
:type line: string
:rtype bool
"""
found = False
f = open(path, 'r+')
lines = f.readlines()
f.seek(0)
for l in lines:
if l != ('%s\n' % line):
f.write(l)
else:
found = True
f.truncate()
f.close()
return found
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