How to use the ganga.GangaSNOplus.Lib.Applications.job_tools.JobToolsException function in ganga

def get_se_path(grid_mode):
    se_name = get_se_name(grid_mode)
    rtc, out, err = execute('lcg-info', ['--list-se', '--vo', 'snoplus.snolab.ca', '--attrs',
                                         'VOInfoPath', '--query', 'SE=%s' % (se_name)])
    if rtc!=0:
        raise JobToolsException('Cannot get se-path for %s' % (se_name))
    try:
        se_path = out[-2].split()[-1]
        if se_path[0]=='/':
            se_path = se_path[1:]
        return se_path
    except:
        raise JobToolsException('Cannot get se-path from %s' % (out))

def getsize(url):
    '''Get the size (must be an srm)
    '''
    rtc, out, err = lcg_ls('-l', url)
    if rtc!=0:
        raise JobToolsException('File does not exist %s' % url)
    else:
        try:
            bits = out[0].split()
            size = int(bits[4])
            return size
        except:
            raise JobToolsException('Cannot get size of %s' % url)

def checksum(url):
    '''Get the checksum of a file (adler32).
    Must provide an SRM.
    '''
    rtc,out,err = execute('lcg-get-checksum', [url])
    if rtc!=0:
        raise JobToolsException('Checksum error: %s'%url)
    else:
        try:
            cks = out[0].split()[0].strip()
            return cks
        except IndexError as e:
            raise JobToolsException('Checksum error: %s'%url)

def exists(url):
    '''Just checks a file exists
    '''
    command = 'lcg-ls'
    rtc, out, err = execute(command, [url])
    if rtc!=0:
        raise JobToolsException('File does not exist %s: %s' % (url, err))

def listreps(url):
    '''Get the locations of a file in the lfc.
    Returns a list.
    '''
    rtc,out,err = execute('lcg-lr', [url])
    if rtc!=0:
        raise JobToolsException('lcg-lr error: %s'%url)
    else:
        return out

def get_se_name(grid_mode):
    if grid_mode == 'srm':
        # Assume this means westgrid
        se_name = "sehn02.atlas.ualberta.ca"
    elif grid_mode == 'lcg':
        se_name = os.environ['VO_SNOPLUS_SNOLAB_CA_DEFAULT_SE']
    else:
        raise JobToolsException('Unknown grid mode %s; cannot get se name' % grid_mode)
    return se_name

import os
import sys
import re
import subprocess


###########################################
# Exceptions
###########################################
class JobToolsException(Exception):
    def __init__(self, error):
        Exception.__init__(self, error)


class CommandException(JobToolsException):
    def __init__(self, command, out, err):
        '''Pass in the command failed and outputs/errors
        '''
        error = '\nCommand: %s' % command
        error += '\nOutput: %s' % out
        error += '\nError: %s' % err
        JobToolsException.__init__(self, error)


###########################################
# Other classes
###########################################
class JobHelper(object):
    '''A singleton class to persist information relating to job setup.

    Useful for jobs where multiple functions need to be called that all

def add_environment(self, path):
        '''Append an environment file that should be used.

        These must be added in the correct order.'''
        if not os.path.exists(path):
            raise JobToolsException("JobHelper: no such file %s" % path)
        self._envs.append(path)

def getguid(url):
    '''Get the guid of a file
    '''
    rtc,out,err = execute('lcg-lg', [url])
    if rtc!=0:
        raise JobToolsException('Cannot get url of %s'%url)
    else:
        guid = out[0]
        return guid

def __init__(self, command, out, err):
        '''Pass in the command failed and outputs/errors
        '''
        error = '\nCommand: %s' % command
        error += '\nOutput: %s' % out
        error += '\nError: %s' % err
        JobToolsException.__init__(self, error)