To convert terabytes (TB) to petabytes (PB) using a Python calculator, you can use the following formula:

`1 TB = 0.001 PB`

Here’s an example of a Python function that performs the conversion:

```
def tb_to_pb(tb):
pb = tb * 0.001
return pb
```

In this example, the `tb_to_pb()`

function takes a value in terabytes (`tb`

) as input and multiplies it by 0.001 to convert it to petabytes. The calculated value in petabytes (`pb`

) is then returned.

You can use this function in your Python code like this:

```
# Example usage
tb_value = 10
pb_value = tb_to_pb(tb_value)
print(pb_value) # Output: 0.01
```

In this example, we convert 10 terabytes to petabytes using the `tb_to_pb()`

function, and the resulting value of 0.01 petabytes is printed to the console.

Note that this conversion assumes the standard SI (International System of Units) prefixes, where 1 terabyte is equal to 0.001 petabytes. If you are working with different conventions or conversions, you may need to adjust the conversion factor accordingly.

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