Change python path in linux

How to set Python environment variable PYTHONPATH on Linux?

Determine the path to your Python module or package. For example, suppose you have a Python module named mymodule located in the /home/user/myproject folder.

Set the PYTHONPATH environment variable to the path of your module or package using the following command −

$export PYTHONPATH=/home/user/myproject:$

This command sets the PYTHONPATH environment variable to /home/user/myproject and also includes the previous value of PYTHONPATH in case it was already set.

Note that the path should be separated by a colon (:) on Linux.

Verify that the PYTHONPATH environment variable has been set correctly using the following command −

This should display the path you set earlier, along with any previous paths that were included in PYTHONPATH.

Let us consider few more examples of setting the PYTHONPATH environment variable on Linux −

Set PYTHONPATH to a single path −

$export PYTHONPATH=/path/to/your/python/module

Set PYTHONPATH to multiple paths −

$export PYTHONPATH=/path/to/your/first/python/module:/path/to/your/second/python/module

Set PYTHONPATH to include the current directory −

$export PYTHONPATH=.:$PYTHONPATH

Set PYTHONPATH to include the current directory and a subdirectory −

$export PYTHONPATH=. /subdir:$PYTHONPATH

This sets the PYTHONPATH environment variable to include the current directory (.) and a subdirectory named subdir located in the current directory.

Note that the PYTHONPATH environment variable only affects the current shell session. If you want to set it permanently, you will need to add the export command to a startup script such as .bashrc or .bash_profile.

Determine the location of the folder containing the Python module or package that you want to add to the PYTHONPATH environment variable. For example, let’s say you have a folder called my_module located in your home directory (~/my_module).

Export the PYTHONPATH environment variable to include the folder containing the module or package, using the export command. For example, to add the ~/my_module folder to the PYTHONPATH environment variable, you can run the following command −

$export PYTHONPATH=$PYTHONPATH:~/my_module

The $PYTHONPATH variable is used to append the new folder to the existing value of PYTHONPATH, so that any previously set paths are not overwritten. The colon (:) is used to separate the new path from the existing paths.

It must be noted that this command will only set the PYTHONPATH environment variable for the current terminal session. To make this setting permanent, you will need to add it to your shell’s configuration file (e.g., ~/.bashrc for Bash).

Verify that the PYTHONPATH environment variable has been set correctly. You can do this by running the following command −

This should display the current value of the PYTHONPATH environment variable, including the folder you just added.

Adding multiple folders to PYTHONPATH

$export PYTHONPATH=$PYTHONPATH:~/my_module:~/my_other_module

This will add both the ~/my_module and ~/my_other_module folders to the PYTHONPATH environment variable.

Adding a folder with a space in its path name −

$export PYTHONPATH=$PYTHONPATH:"/path/with/space/my_module"

Note the use of double quotes to enclose the path name containing spaces.

Adding a folder relative to the current directory −

$export PYTHONPATH=$PYTHONPATH:./my_module

This will add the my_module folder located in the current directory to the PYTHONPATH environment variable.

Setting PYTHONPATH to a specific folder only −

$export PYTHONPATH=/path/to/my_module

This will set the PYTHONPATH environment variable to only contain the my_module folder located at /path/to/.

By setting the PYTHONPATH environment variable, you can ensure that Python can find and import the modules and packages you need for your projects, even if they are located outside of the default search paths.

Adding a package that requires a specific version of Python −

$export PYTHONPATH=$PYTHONPATH:/path/to/my_package

If you have multiple versions of Python installed on your system and you want to use a package that requires a specific version, you can add the package’s location to the PYTHONPATH environment variable. This will allow you to use the package with the specific version of Python required.

For example, if you have Python 3.6 installed and a package that requires Python 3.7, you can add the package’s location to the PYTHONPATH environment variable for Python 3.6. Then, when you run Python 3.6, it will be able to find and import the package.

It must be noted that this approach is not a substitute for installing packages with the correct version of Python using a package manager like pip. Instead, it is a workaround for situations where you need to use a package that is not available for the version of Python you have installed.

These examples demonstrate the flexibility of the PYTHONPATH environment variable and how it can be used to customize the search path for Python modules and packages. By setting PYTHONPATH correctly, you can avoid errors related to module imports and ensure that your Python scripts and applications can access the modules and packages they need.

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change python path linux

To make the change permanent, enter the command PATH=$PATH:/opt/bin into your home directory’s . bashrc file. When you do this, you’re creating a new PATH variable by appending a directory to the current PATH variable, $PATH . A colon ( : ) separates PATH entries.

Where is my python path Linux?

1. Type import os and press Enter.
2. Type os. environ[‘PYTHONPATH’]. split(os. pathsep) and press Enter. When you have a PYTHONPATH environment variable defined, you see a list of paths. .
3. Close the Python Shell. The Python Shell window closes.

Should I add Python to path?

Adding Python to PATH makes it possible for you to run (use) Python from your command prompt (also known as command-line or cmd). This lets you access the Python shell from your command prompt. In simpler terms, you can run your code from the Python shell by just typing “python” in the command prompt, as shown below.

What is my path Python?

PYTHONPATH is an environment variable whose value is a list of directories. Once set, it is used by Python to search for imported modules, along with other std. . In summary, PYTHONPATH is one way of specifying the Python search path(s) for imported modules in sys.

What is the path in Linux?

PATH is an environmental variable in Linux and other Unix-like operating systems that tells the shell which directories to search for executable files (i.e., ready-to-run programs) in response to commands issued by a user.

How do I change directories in terminal?

To change directories, use the command cd followed by the name of the directory (e.g. cd downloads ). Then, you can print your current working directory again to check the new path.

How do I add to python path?

1. Right-clicking This PC and going to Properties.
2. Clicking on the Advanced system settings in the menu on the left.
3. Clicking on the Environment Variables button o​n the bottom right.
4. In the System variables section, selecting the Path variable and clicking on Edit. .
5. Clicking on New and entering Python’s install directory.

How do I find the PATH variable in Linux?

1. Use echo $PATH to view your path variables.
2. Use find / -name «filename» –type f print to find the full path to a file.
3. Use export PATH=$PATH:/new/directory to add a new directory to the path.

How do I change my path?

1. From the desktop, right click the My Computer icon.
2. Choose Properties from the context menu.
3. Click the Advanced tab (Advanced system settings link in Vista).
4. Click Environment Variables. .
5. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable.

How do I set the path for all users in Linux?

1. To set path for particular user : You may need to make the entry in . bash_profile in home directory in the user. .
2. To set common path for ALL system users, you may need to set path like this : [root~]# echo «export PATH=$PATH:/path/to/dir» >> /etc/profile.

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How to set up Python path?

I have uninstall anaconda2. but now when I run Python command in terminal it says «bash: /home/user/anaconda2/python: No such file or directory» now how can I set to Python when I have python 2.7 in «/usr/lib» .

When you installed anaconda2, did you add any PYTHONPATH directives to your startup file(s) (such as your ~/.bashrc )? You probably just need to remove these, rather than set any additional path.

4 Answers 4

I’m assuming that when you installed anaconda 2, you manually set the PYTHONPATH environment variable, by putting something like

PYTHONPATH=/home/user/anaconda2/python export PYTHONPATH 

in your .bash_profile or .bash_rc .

But since you deleted the /home/user/anacanda2/ directory, that path no longer exists.

Thus you want to change PYTHONPATH to point to the executable in /usr/lib , by changing the above to

PYTHONPATH=/usr/lib/my_python_distribution export PYTHON 

root1@master:/usr/lib/python2.7$ echo $PATH /home/root1/anaconda3/bin:/home/root1/NAI/Execution/HDE/x86_64.linux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/root1/java/jdk1.8.0_74/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/root1/NAI/hadoop-2.7.3/bin 

export PATH=/home/root1/NAI/Execution/HDE/x86_64.linux/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/home/root1/java/jdk1.8.0_74/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/root1/NAI/hadoop-2.7.3/bin 

root1@master:/usr/lib/python2.7$ python Python 2.7.14 (default, Sep 18 2017, 00:00:00) [GCC 4.8.4] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> 

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