gistfile1.txt

@blueprint.route("/repl/run/", methods=["POST"])
def repl_run():
    import subprocess
    if 'code' in request.form:
        run_this = request.form['code']   
        run_this = run_this.replace('\n',';').replace('/\r/',';')
        try:
            output = subprocess.check_output(['python', '-c', 'print 1 + r'])
        except subprocess.CalledProcessError as e:
            return e.message
        else:
            return output
    return output
    
Does not return that error to the output... does print it to the command line.