# Upgrading

```{warning}
This version of the documentation is for older releases of Brightway (`legacy` or `brightway2`). It includes only those pages which are relevant to the legacy releases. To access the complete documentation, please switch the the [latest version](https://docs.brightway.dev/en/latest/). The legacy releases [supports the popular Activity Browser user interface](../setup/ui.md), but do not have the latest features of Brightway. You can learn more about [the different versions of Brightway here](../faq/brightway.md).
```

## Upgrading from Version 1

Upgrading from version 1 requires a full export of your data objects, and reimporting them after upgrading the software. Please follow these steps:

1.  **Don\'t** upgrade your software yet! Instead, first export your
    databases and methods into Brightway packages:

``` python
from bw2data import *
from bw2data.io import BW2Package

for index, name in enumerate(databases):
    BW2Package.export_obj(Database(name), "db-{}".format(index), "upgrade")

for index, name in enumerate(methods):
    BW2Package.export_obj(Method(name), "lcia-{}".format(index), "upgrade")

# Add in any other objects you want to export here

# Might have to remove parenthese around print statement
print("Your exported objects are here:", config.request_dir("upgrade"))
```

2.  Upgrade your software following the installation guide.
3.  Each data directory would now be a new project. You can import the
    objects you exported earlier like this:

``` python
from brightway2 import *
import os

preferences['allow incomplete imports'] = True

filepath = "path that was printed earlier in section 1"
projects.current = "name of this project"

for filename in sorted(os.listdir(filepath)):
    print(filename)
    BW2Package.import_file(os.path.join(filepath, filename))
```

You will need to do this for each data directory you want to upgrade.

## Upgrading from Version 2

:::{note}
Add context here...
:::