python中os.path.isdir()和os.path.isfile()的正确用法

青旅半醒 2022-09-13 05:16 124阅读 0赞

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先介绍一下os.listdir()方法，此方法返回一个列表，其中包含有指定路径下的目录和文件的名称

import os
    dirct = '/home/workespace/notebook/'
    for i in os.listdir(dirct):
        print(i)

redis
    study_test.ipynb
    mnist_dataset
    .ipynb_checkpoints
    yaml-tool
    sweetwater
    makeyourownneuralnetwork
    Untitled.ipynb
    AI-Practice-Tensorflow-Notes
    working
    cornfield

os.path.isdir()和os.path.isfile()需要传入的参数是绝对路径，但是os.listdir()返回的只是一个某个路径下的文件和列表的名称.

常见错误：直接使用os.listdir()的返回值当做os.path.isdir()和os.path.isfile()的入参

正确用法：需要先使用python路径拼接os.path.join()函数，将os.listdir()返回的名称拼接成文件或目录的绝对路径再传入os.path.isdir()和os.path.isfile().  
os.path.join()用法：

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    import os
    dirct = '/home/workespace/notebook/'
    for i in os.listdir(dirct):
        fulldirct = os.path.join(dirct,i)
        print(fulldirct)

/home/workespace/notebook/redis
    /home/workespace/notebook/study_test.ipynb
    /home/workespace/notebook/mnist_dataset
    /home/workespace/notebook/.ipynb_checkpoints
    /home/workespace/notebook/yaml-tool
    /home/workespace/notebook/sweetwater
    /home/workespace/notebook/makeyourownneuralnetwork
    /home/workespace/notebook/Untitled.ipynb
    /home/workespace/notebook/AI-Practice-Tensorflow-Notes
    /home/workespace/notebook/working
    /home/workespace/notebook/cornfield

os.path.isdir()用于判断某一对象(需提供绝对路径)是否为目录

#Python学习交流群：778463939
    import os
    dirct = '/home/workespace/notebook/'
    for i in os.listdir(dirct):
        fulldirct = os.path.join(dirct, i)
        if os.path.isdir(fulldirct): #入参需要是绝对路径
            print(i)

redis
    mnist_dataset
    .ipynb_checkpoints
    yaml-tool
    sweetwater
    makeyourownneuralnetwork
    AI-Practice-Tensorflow-Notes
    working
    cornfield

os.path.isfile()用于判断某一对象(需提供绝对路径)是否为文件

import os
    dirct = '/home/workespace/notebook/'
    for i in os.listdir(dirct):
        fulldirct = os.path.join(dirct, i)
        if os.path.isfile(fulldirct): #入参需要是绝对路径
            print(i)

study_test.ipynb
    Untitled.ipynb

标签: [python][]

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