# Remote Debugging with PyCharm Professional
## Introduction
In this tutorial, you can learn how to set up remote debugging with PyCharm Professional on the platform using the flow template.
{% hint style="warning" %}
Remote debugging relies on a running SSH server in a job's 22 port. We ensure it for you if you use our base image (`ghcr.io/neuro-inc/base`).
{% endhint %}
## Initializing a new flow
First, make sure that you have the Apolo CLI client and [**cookiecutter**](https://github.com/cookiecutter/cookiecutter) installed and configured, refer to [https://github.com/neuro-inc/apolo-documentation/blob/master/apolo-console/first-steps/getting-started.md#installing-the-cli](https://github.com/neuro-inc/apolo-documentation/blob/master/apolo-console/first-steps/getting-started.md#installing-the-cli "mention")
Then, initialize a new flow:
```bash
$ cookiecutter gh:neuro-inc/cookiecutter-neuro-project --checkout release
```
This command will prompt you to enter some info about your flow:
```
project_name [Name of the project]: Apolo PyCharm
project_dir [apolo pycharm]:
project_id [apolo_pycharm]:
code_directory [modules]:
preserve Neuro Flow template hints [yes]:
```
Next, switch to the new project's folder and configure the project's environment on the Platform:
```bash
$ cd apolo_pycharm
$ apolo-flow build train
```
## Setting up PyCharm
Open the project you have just created in PyCharm Professional and add the code you want to debug as a new `main.py` file (in this example, we use a code snippet from the [JetBrains documentation](https://www.jetbrains.com/help/pycharm/remote-debugging-with-product.html)).
Then, you will need to exclude all directories that don't contain Python code (in an empty Apolo project, only the `modules` folder will contain code). PyCharm doesn't synchronize excluded directories. Select all directories to exclude, right-click, and select **Mark Directory as** -> **Excluded**. As a result, you will see a configured project:
.png?alt=media)
Run these commands to upload your code to the platform storage:
```bash
> apolo-flow mkvolumes
> apolo-flow upload ALL
```
Now, we are ready to start a GPU-powered development job on the platform. Run the following command:
> apolo-flow run remote_debug
.png?alt=media)
This command starts a `remote_debug` job on the platform. This job uses the user's default preset and forwards the local port 2211 to the job's SSH port. All running jobs consume your quota, so please *don't forget to terminate your jobs* when they are no longer needed. You can use `apolo-flow kill remote_debug` to kill the job you created in the previous step or `apolo-flow kill ALL` to kill all your running jobs.
Then go back to the PyCharm project and navigate to **Preferences** -> **Project** -> **Project interpreter** (you can also search for "interpreter"). Click the **gear icon** to view the project interpreter options and select **Add...** In the new window, select **SSH Interpreter** and set up the following configuration:
* Host: *localhost*
* Port: *2211*
* Username: *root*
.png?alt=media)
When this is done, click **Next**.
In the new window, specify the paths for the interpreter and synced folders:
```bash
Interpreter: /usr/bin/python
Sync folders: -> /apolo_pycharm
```
Note that, within the job, your project's root folder is available at the root of the filesystem: `/{project_name}` .
Click **Finish,** and your configuration is ready:
.png?alt=media)
Click **OK**.
Once you apply the remote interpreter configuration, PyCharm will start file synchronization.
Your PyCharm project is now configured to work with a remote Python interpreter running in a job.
## Debugging
In this example, we're working with the `main.py` file. To enter debug mode, right-click the file and click **Debug 'main'**:
.png?alt=media)
Now, you can interact with the file in debug mode:
.png?alt=media)
{% hint style="info" %}
If your project's mapping was not configured and the remote interpreter attempts to execute a file with a local path on the remote environment, you might need to specify the path mappings. You can do that at **Run** -> **Edit Configurations...** -> **Path mappings**:
{% endhint %}
.png?alt=media)