In Python, you can get the location (path) of the running script file .py with __file__. __file__ is useful for reading other files based on the location of the running file.

1. The cell function is used to get the full file name and path: CELL('filename',A1) The result looks like this: pathworkbook.xlsmsheet The full file name and path are fed into the LEFT function, which is used to extract just the full directory path.
2. Via File Explorer Ribbon. Another easy way to copy the full path of files and folders on Windows is.
3. Way to get absolute path of file PHP. Ask Question Asked 4 years, 5 months ago. Active 1 year ago. Viewed 32k times 18. Is there a way to get the absolute path of a file while having it included in another script? So I'm trying to include a file that's in folder A while I'm in folder B but it keeps trying to refer to folder B's location.

The file path from which to get the extension. Returns ReadOnlySpan The extension of the specified path (including the period, '.' ), or Empty if path does not have extension information.

In Python 3.8 and earlier, __file__ returns the path specified when executing the python (or python3) command. If you specify a relative path, a relative path is returned. If you specify an absolute path, an absolute path is returned.

In Python 3.9 and later, __file__ always returns an absolute path, regardless of whether the path specified with the python command is relative or absolute.

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This article describes the following contents.

• os.getcwd() and __file__
• Get the file name and the directory name of the running file
• Get the absolute path of the running file
• Read other files based on the location of the running file
• Change the current directory to the directory of the running file
• Read the same file regardless of the current working directory

Refer to the following article for how to get and change the current working directory.

Note that __file__ cannot be used in Jupyter Notebook (.ipynb). Regardless of the directory where Jupyter Notebook is started, the current directory is the directory where .ipynb is located. It is possible to change the current directory using os.chdir () in the code.

os.getcwd() and __file__

Suppose you work in the following directory. On Windows, you can check the current directory with the dir command instead of pwd.

Create a Python script file (file_path.py) with the following code in the lower directory (data/src).

Run it with the python (or python3) command.

You can get the absolute path of the current working directory with os.getcwd() and the path specified with the python3 command with __file__.

In Python 3.8 and earlier, the path specified by the python (or python3) command is stored in __file__. In the above example, a relative path is specified, so a relative path is returned, but if an absolute path is specified, an absolute path is returned.

In Python 3.9 and later, __file__ always returns an absolute path, regardless of whether the path specified with the python command is relative or absolute.

In the following examples, add code to the same script file (file_path.py), and execute from the same directory as the above example in Python3.7.

Note that if __file__ is an absolute path (when Python 3.9 or later, or when specifying with the absolute path in Python 3.8 or earlier), you can use the same code as described below to read other files based on the location of the running script file. The results of executing by specifying the absolute path in Python3.7 are shown at the end.

Get the file name and the directory name of the running file

One password 7. Use os.path.basename(), os.path.dirname() to get the file name and the directory name of the running file.

The result is as follows.

See the following article for details on os.path.basename(), os.path.dirname(), etc.

Get the absolute path of the running file

If you get the relative path with __file__, you can convert it to an absolute path with os.path.abspath().

The result is as follows.

If you specify an absolute path in os.path.abspath(), it will be returned as it is, so if __file__ is an absolute path, no error will occur even if you set os.path.abspath(__file__).

Read other files based on the location of the running file

If you want to read other files based on the location (path) of the running file, join the directory path of the running file and the relative path (from the running file) of the file you want to read with os.path.join().

Note that files in the same directory as the running file can be read by specifying only the file name.

The result is as follows.

The upper directory is represented by ./. There is no problem as it is, but if you use os.path.normpath(), you can normalize the path and remove extra ./, etc.

The result is as follows.

Change the current directory to the directory of the running file

Use os.chdir() to change the current working directory to the directory of the running file.

You can confirm that it has been changed with os.getcwd().

The result is as follows.

If the current working directory is the same as the directory of the running file, you can specify a relative path from the running file to read other files.

The result is as follows.

Read the same file regardless of the current working directory

By using __file__ to get the path of the running script file, the same file can be read regardless of the current working directory.

As shown so far, there are two ways:

• Join the __file__ directory and the relative path (from __file__) of the file you want to read with os.path.join()
• Change the current working directory to __file__ directory

It is easier to change the current directory, but of course, if you read or write files after that, you need to consider that the current directory has been changed.

The results of the examples so far are as follows.

The results for specifying the absolute path with python3 command is as follows. The same file can be read.

Change the current directory in the terminal and execute the same script file. You can see that the same file can be read from different locations.

Definition

Overloads

Returns the extension (including the period '.') of the specified path string.

Parameters

path

String

The path string from which to get the extension.

Returns

String

The extension of the specified path (including the period '.'), or null, or Empty. If path is null, GetExtension(String) returns null. If path does not have extension information, GetExtension(String) returns Empty.

Exceptions

.NET Framework and .NET Core versions older than 2.1: path contains one or more of the invalid characters defined in GetInvalidPathChars().

Examples

The following example demonstrates using the GetExtension method on a Windows-based desktop platform.

Remarks

How To Find A File Path

This method obtains the extension of path by searching path for a period (.), starting with the last character in path and continuing toward the first character. Paragon ntfs for mac os x 11 download. If a period is found before a DirectorySeparatorChar or AltDirectorySeparatorChar character, the returned string contains the period and the characters after it; otherwise, String.Empty is returned.

For a list of common I/O tasks, see Common I/O Tasks.

Returns the extension of a file path that is represented by a read-only character span.

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Parameters

Get File Path Js

path

ReadOnlySpan<Char>

The file path from which to get the extension.

Returns

Get File Path From File Object

ReadOnlySpan<Char>

The extension of the specified path (including the period, '.'), or Empty if path does not have extension information.

Get File Path

Remarks

Get File Path Python

This method obtains the extension of path by searching path for a period ('.'), starting from the last character in the read-only span and continuing toward its first character. If a period is found before a DirectorySeparatorChar or AltDirectorySeparatorChar character, the returned read-only span contains the period and the characters after it; otherwise, ReadOnlySpan<T>.Empty is returned.