[feature request] A better repr for panflute AST

[ickc]

For example,

>>> from panflute import *
>>> table_referenced = Table(TableRow(TableCell(Plain(Str(''))), TableCell(Plain(Str('')))), TableRow(TableCell(Plain(Str('1'))), TableCell(Plain(Str('2')))), TableRow(TableCell(Plain(Str('3'))), TableCell(Plain(Str('4')))), alignment=['AlignDefault', 'AlignDefault'], width=[0.5, 0.5])
>>> repr(table_referenced)
"Table(TableRow(TableCell(Plain(Str())) TableCell(Plain(Str()))) TableRow(TableCell(Plain(Str(1))) TableCell(Plain(Str(2)))) TableRow(TableCell(Plain(Str(3))) TableCell(Plain(Str(4)))); alignment=['AlignDefault', 'AlignDefault'], width=[0.5, 0.5], rows=3, cols=2)"

It will be easier for writing tests if repr(table_referenced) would be just Table(TableRow(TableCell(Plain(Str(''))), TableCell(Plain(Str('')))), TableRow(TableCell(Plain(Str('1'))), TableCell(Plain(Str('2')))), TableRow(TableCell(Plain(Str('3'))), TableCell(Plain(Str('4')))), alignment=['AlignDefault', 'AlignDefault'], width=[0.5, 0.5]). i.e. if I copy the repr output and paste it, it would be a valid function to generate a panflute AST.

Currently, the __str__ points to the __repr__ method, may be the current repr will be moved to str, and has a new repr that has the said behavior?

[sergiocorreia]

Makes sense (also agrees with the stated purpose of repr).

That said, it might be a lot of work to have valid repr for most objects. Will try to see if I can push a quick commit but not entirely sure of the timeline.

[sergiocorreia]

Might also be a good idea to add more convenience functions/attributes, such as testing for equality, or adding a startswith method.

See https://github.com/bmc/ebook-template/blob/master/scripts/pandoc-filter.py for ideas