If the reason you're checking is so you can do something like if file_exists: open_it(), it's safer to use a try around the attempt to open it. Checking and then opening risks the file being deleted or moved or something between when you check and when you try to open it.

If you're not planning to open the file immediately, you can use os.path.isfile

Return True if path is an existing regular file. This follows symbolic links, so both islink() and isfile() can be true for the same path.

import os.path

if you need to be sure it's a file.

Starting with Python 3.4, the pathlib module offers an object-oriented approach (backported to pathlib2 in Python 2.7):

from pathlib import Path

my_file = Path("/path/to/file")
if my_file.is_file():
    # file exists

To check a directory, do:

if my_file.is_dir():
    # directory exists

To check whether a Path object exists independently of whether is it a file or directory, use exists():

if my_file.exists():
    # path exists

You can also use resolve(strict=True) in a try block:

    my_abs_path = my_file.resolve(strict=True)
except FileNotFoundError:
    # doesn't exist
    # exists

Python判断文件是否存在的三种方法- j_hao104 - 博客园


2017年7月27日 ... 文件存在,但是没有权限访问,会抛出一个 PersmissionError 的异常。 所以可以 使用下面的代码来判断文件是否存在: try: f =open() f ...

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Feb 10, 2021 ... Python exists() method is used to check whether specific file or directory exists or not. It is also used to check if a path refers to any open file ...

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2018年5月25日 ... 在Linux文件系统中,我们可以使用下面的Shell脚本判断某个文件是否存在: # 这里的-f参数判断$file是否存在 if [ ! -f "$file" ]; then echo "文件不 ...

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2011年10月17日 ... 这里的-f参数判断$myFile是否存在 18. if [ ! -f "$myFile" ]; then 19. touch "$myFile" 20. fi 21. 22. # 其他参数还有-n,-n是判断一个变量是否是否有值

How do I check whether a file exists without exceptions? - Stack ...


If the reason you're checking is so you can do something like if file_exists: open_it() , it's safer to use a try around the attempt to open it. Checking and then ...

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2018年1月13日 ... 判断目录是否存在import osdirs = '/Users/joseph/work/python/'if not ... python 判断 一个文件是否存在,如果不存在,就创建import os # 判断 ...

判断文件是否存在local/hdfs - 华为云


2017年7月17日 ... 在Linux文件系统中,我们可以使用下面的Shell脚本判断某个文件是否存在: # 这里的-f参数判断$file是否存在 if [ ! -f "$file" ]; then echo "文件不 ...

python判断某个文件是否存在,如果存在则删除- osc_9reytqkm的 ...


2020年6月11日 ... python判断某个文件是否存在,如果存在则删除: if os.path.exists(filefullpath): os. remove(filefullpath)

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Jun 6, 2020 ... When checking if a file exists, the most commonly used FILE operators are -e and -f . The first one will check whether a file exists regardless of ...

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Nov 24, 2020 ... Python Check if Directory Exists. The Python os.path.isdir() method checks if a directory exists. It returns False if you specify a path to a file or a ...

在shell中如何判断HDFS中的文件目录是否存在– 过往记忆


2016年3月22日 ... 在Linux文件系统中,我们可以使用下面的Shell脚本判断某个文件是否存在: [code lang='bash'] # 这里的-f参数判断$file是否存在if [ ! -f "$file" ] ...

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Python 操作文件时,我们一般要先判断指定的文件或目录是否存在,不然容易产生 异常。 例如我们 ... 如果要检测路径是一个文件或目录可以使用exists() 方法:



2018年10月9日 ... 注意这接口只是判定磁盘(闪存)物理路径上是否存在某个文件(目录),我们 知道Application.streamingAssetsPath取到的是StreamingAssets ...

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Dec 2, 2019 ... Check if File Exists using the os.path Module # · os.path.exists(path) - Returns true if the path is a file, directory, or a valid symlink. · os.path.isfile( ...

File.Exists(String) Method (System.IO) | Microsoft Docs


The file to check. Returns. Boolean. true if the caller has the required permissions and path contains the name of an existing file ...

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Option #1: os.path.exists() and os.path.isfile(). The most common way to check for the existence of a file in Python ...

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Starting in R2017b, you can use the "isfile" function to check if a file exists. · The " isfile" function searches for files only on the specified path or in the current folder.

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Aug 25, 2020 ... The exists() function is a part of File class in Java . This function determines whether the is a file or directory denoted by the abstract filename ...

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1. Check if file exists with File.exists() method. To test to see if a file or directory exists, use the “ exists() ...