def get_value_from_conf(conf_file, key):
    
    if not os.path.exists(conf_file):
        return ""
    
    if not os.path.isfile(conf_file):
        return ""
    
    try:
        with open(conf_file, 'r') as f:
            while True:
                data = f.readline()
                
                if not data:
                    break
                
                if len(data.split('=')) is not 2:
                    continue
                
                if data.strip()[0] == "#":
                    continue
                
                if data.split('=')[0].strip() == key:
                    return str(data.split('=', 1)[1].strip())
    except IOError:
        return ""
dataset/ETHPy150Open hww712/knitter/knitter/common.py/get_value_from_conf/operator `<` -> `is not`