How to check if a file or directory exists in Python

    RahulBy 2 Mins ReadUpdated:

    The Python os.path module is used for the file or directory pathename’s manipulations. The method isfile() of this module is used to check if any file is available or not. Similarly exists() function returns true for files and directory exists.

    This tutorial includes:

    1. Check if file exists in Python
    2. Check if file is readable in Python
    3. Create directory if not exists in Python

    1. Check if file exists

    For example, To test how isfile() and exists() functions work. Create a TestFile.py file using following content and execute it python.

    • isfile() – function check if given input file exists and is a file not directory.
    • exists() – function check if given input file/directory exists.

    See the below examples:

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    import os.path
     
    print os.path.isfile("/etc/hosts")       #True
    print os.path.isfile("/etc")             #False
    print os.path.isfile("/does/not/exist")  #False
    print os.path.exists("/etc/hosts")       #True
    print os.path.exists("/etc")             #True
    print os.path.exists("/does/not/exist")  #False

    Python >= 3.4 users can use object oriented approach to check if file exist or not. we need to import Path from the pathlib module.

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    from pathlib import Path
     
    fileName = Path("/etc/hosts")
     
    if fileName.is_file():
        print ("File exist")
    else:
        print ("File not exist")

    2. Check if file is readable

    You can also check if the file exists and is readable for the current users in Python.

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    import os.path
     
    if os.path.isfile('/etc/hosts') and os.access('/etc/hosts', os.R_OK):
        print "File exists and is readable"
    else:
        print "Either file is missing or is not readable"

    #3. Python – Check if Link File

    Use os.path.islink to find if any file is a link file.

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    import os.path
     
    if os.path.isfile("/etc/hosts") and os.path.islink("/etc/hosts"):
        print "This is a link file"
    else:
        print "This is an actual file"

    3. Create a directory if not exists

    Use os.path.exists to check if any directory exists or not and use os.makedirs to create a directory. Below example will create a directory /tmp/newdir if not exists.

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    if not os.path.exists('/tmp/newdir'):
        os.makedirs('/tmp/newdir')

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