With python3.8, a new feature is [self documenting format strings](https://docs.python.org/3/whatsnew/3.8.html#f-strings-support-for-self-documenting-expressions-and-debugging). Where one would normally do this:

```
>>> x = 10.583005244
>>> print(f"x={x}")
x=10.583005244
>>> 

```

One can now do this, with less repetition:

```
>>> x = 10.583005244
>>> print(f"{x=}")
x=10.583005244
>>> 

```

This works very well for one line string representations. But consider the following scenario:

```
>>> import numpy as np
>>> some_fairly_long_named_arr = np.random.rand(4,2)
>>> print(f"{some_fairly_long_named_arr=}")
some_fairly_long_named_arr=array([[0.05281443, 0.06559171],
       [0.13017109, 0.69505908],
       [0.60807431, 0.58159127],
       [0.92113252, 0.4950851 ]])
>>> 

```

Here, the first line does not get aligned, which is (arguably) not desirable. I would rather prefer the output of the following:

```
>>> import numpy as np
>>> some_fairly_long_named_arr = np.random.rand(4,2)
>>> print(f"some_fairly_long_named_arr=\n{some_fairly_long_named_arr!r}")
some_fairly_long_named_arr=
array([[0.06278696, 0.04521056],
       [0.33805303, 0.17155518],
       [0.9228059 , 0.58935207],
       [0.80180669, 0.54939958]])
>>> 

```

Here, the first line of the output is aligned as well, but it defeats the purpose of not repeating the variable name twice in the print statement.

The example is a numpy array, but it could have been a pandas dataframe etc. as well.

Hence, my question is: Can a newline character be inserted after the = sign in self documenting strings?

I tried to add it like this, but it does not work:

```
>>> print(f"{some_fairly_long_named_arr=\n}")
SyntaxError: f-string expression part cannot include a backslash

```

I read [the docs on format-specification-mini-language](https://docs.python.org/3/library/string.html#format-specification-mini-language), but most of the formatting there only works for simple data types like integers, and I was not able to achieve what I wanted using those that work.

Sorry for the long write-up.