Python所需的字符串不是列表

Question

运行下面的代码时，我收到一条错误消息，上面说“TypeError:expected str，bytes或os.PathLike object，not list”

我使用Spyder调试了上面的错误消息，但是我找不到错误。 有人能告诉我如何解决这个错误吗？代码如下所示

谢谢大家!

J1 = ['520A','520B']
J2 = ['560S','580A']

JOINTS = J1 + J2

FILES_IN = ['dynres-x-eqk.lst','dynres-y-eqk.lst','dynres-z-eqk.lst'] 
FILE_OUT = ['_Accelerations.txt']

def joint_acc(joint, file_in):
    output = []
    with open(file_in, 'rt') as f_in:
        for line in f_in:
            if 'JOINT ACCELERATIONS' in line:
                for line in f_in:
                    if line.startswith(joint):
                        while line.strip() != '':
                            output.append(line)
                            line = next(f_in)
                        break
    return ''.join(output)

with open(FILE_OUT, 'wt') as f_out:
    for Jt in JOINTS:
        for filename in FILES_IN:
            f_out.write(joint_acc(Jt, filename))
        f_out.write('\n')

Answer 1

你做到了：

FILE_OUT = ['_Accelerations.txt']

然后：

with open(FILE_OUT, 'wt') as f_out:

所以这个open得到list，它导致TypeError。尝试用FILE_OUT = '_Accelerations.txt'替换FILE_OUT = ['_Accelerations.txt']

Answer 2

您的FILE_OUT变量是list类型，但是open等待str、bytes或os.PathLike对象类型

您应该将FILE_OUT变量转换为正确的类型

例如字符串：

FILE_OUT = "_Accelerations.txt"

或者您可以使用0索引访问列表的第一个元素（您的列表只有1个元素）

像这样：

with open(FILE_OUT[0], 'wt') as f_out: