def cmd(c):
    import subprocess
    proc = subprocess.Popen(c, stdout=subprocess.PIPE, shell=True)
    (ret, err) = proc.communicate()
    if (err is not None) and err!="":
        raise Exception(err)    
    return ret


def run_cpython(script_name, args = []):
    script = get_context().scriptManager.library.resolveFile(script_name)
    c = "python " + script + " "
    for arg in args:
        c = c + str(arg) + " "    
    return cmd(c)
    
def call_cpython(script_name, method_name, args = []):
    launcher = get_context().scriptManager.library.resolveFile("launcher")
    
    script = os.path.abspath(get_context().scriptManager.library.resolveFile(script_name))
    jsonargs = json.dumps(args)        
    
    a = []
    a.append(script)
    a.append(method_name)
    a.append('"' + jsonargs + '"')
    ret = run_cpython(launcher, a)    
    ret = ret[0:-2]
    jsonret = ret[ret.rfind('\n')+1:]
    return json.loads(jsonret)
    

def call_cpython(script_name, method_name, args = []):
    script = os.path.abspath(get_context().scriptManager.library.resolveFile(script_name))    
    jsonargs = json.dumps(args)            
    
    launcher = ""
    launcher = launcher + "script = '" +script + "'\n"
    launcher = launcher + "function = '" +method_name + "'\n"
    launcher = launcher + "jsonargs = '" +jsonargs + "'\n"    
    launcher = launcher + """import sys
import json
import os
args =json.loads(jsonargs)
i = script.rfind(os.sep)
module = script[i+1:-3]
sys.path.insert(1,script[:i+1])
exec 'from ' + module + ' import ' + function + ' as function'
print json.dumps(function(*args))
"""       
    launcher = launcher.replace('\n', ';')
    launcher = launcher.replace('\\', '\\\\')
    c = 'python -c "'  + launcher + '"'
    ret = cmd(c)
    ret = ret[0:-2]
    jsonret = ret[ret.rfind('\n')+1:]
    return json.loads(jsonret)


print cmd("dir")
print "--------"
print run_cpython("np", ["asd", 2])
print "--------"
ret = call_cpython("np","add", [[1,2,3,4,5], [3,3,3,3,3]])
print ret