> For the complete documentation index, see [llms.txt](https://docs.r.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.r.xyz/glider-ide/api/point/varvalue/varvalue.backward_df.md).

# VarValue.backward\_df()

Returns the list of all previous points of the current point in the data flow graph.

`backward_df() →` [`APISet`](/glider-ide/api/iterables/apiset.md)`[`[`Point`](/glider-ide/api/point/point.md)`]`

## Query Example

```python
from glider import *


def query():
  instrucitons = (
    Instructions()
    .exec(1,30)
  )

  for instruciton in instrucitons:
    components = instruciton.get_components()
    for component in components:
      for backward_df in component.backward_df():
        print(backward_df.source_code())

  return instrucitons
```

## Output Example

<figure><img src="https://2237101709-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FDX4Ojc4j1ef51TUAtYOx%2Fuploads%2FaMkbO55b9z2iirHtb7Tf%2Fimage.png?alt=media&amp;token=d965c9a1-f696-42f8-906e-a1639b875aab" alt=""><figcaption></figcaption></figure>