Upgrade FPDF to version 2 and fix backward incompatibilities

[reingart]

To bump fpdf library some changes are needed as new version is backward incompatible

pip unistall fpdf
pip install fpdf2

Errors python pyfepdf.py --prueba

Encodign in UTF-8
Prueba!
/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/fpdf.py:1887: UserWarning: Substituting font arial by core font helvetica
  warnings.warn(
/home/devel/pa/pyfepdf.py:1650: DeprecationWarning: "dest" is deprecated, unused and will soon be removed
  return self.template.render(archivo, dest)
Traceback (most recent call last):
  File "/home/devel/pa/pyfepdf.py", line 2105, in <module>
    main()
  File "/home/devel/pa/pyfepdf.py", line 2098, in main
    fepdf.GenerarPDF(archivo=salida)
  File "/home/devel/pa/pyafipws/utils.py", line 240, in capturar_errores_wrapper
    return func(self, *args, **kwargs)
  File "/home/devel/pa/pyfepdf.py", line 1650, in GenerarPDF
    return self.template.render(archivo, dest)
  File "/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/template.py", line 686, in render
    super().render()
  File "/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/template.py", line 575, in render
    self.handlers[handler_name](**ele)
  File "/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/template.py", line 354, in _text
    pdf.cell(w=width, h=height, txt=text, border=0, align=align, fill=fill)
  File "/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/fpdf.py", line 220, in wrapper
    return fn(self, *args, **kwargs)
  File "/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/fpdf.py", line 2728, in cell
    align = Align.coerce(align)
  File "/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/enums.py", line 142, in coerce
    return super(cls, cls).coerce(value)
  File "/home/devel/pa/.venv/lib/python3.10/site-packages/fpdf/enums.py", line 55, in coerce
    raise ValueError(f"{value} is not a valid {cls.__name__}")
ValueError: I is not a valid Align
```

Proper Unit Test should be written comparing current PDF with the one generated by the new library

[Lucas-C]

Hi, fpdf2 maintainer here 😊

Thank you for making this compatibility test and sharing the results.

Regarding this ValueError: I is not a valid Align, I don't understand how this can be a valid value for align...
I don't see it documented anywhere, or even appearing in the code of https://github.com/reingart/pyfpdf.
I think it must fall in the else case there: https://github.com/reingart/pyfpdf/blob/master/fpdf/fpdf.py#L760

If you have an explanation for the meaning of this value of align='I', we could consider adding backward-compatible support for it in fpdf2. But right now it seems more relevant to fix https://github.com/PyAr/pyafipws code to get rid of this strange value of align='I' 😅

[gmischler]

Late to the party, but anyway...

align="I" is obviously a client-side bug, and was probably meant to read align="J".
On the library side, silently ignoring an invalid parameter value - as the legacy version does - should also be considered a bug.
Fix both bugs, (and any similar ones that may come up), and the transition should proceed rather smoothly.

For your convenience: A List of API differences between PyFPDF and fpdf2

[RohitP2005]

hey @Lucas-C if the issue is still open , i would like to work on it, if it is unassigned

[Lucas-C]

Hi.

I am not a maintainer of https://github.com/PyAr/pyafipws 😅

You should probably ask @reingart

[RohitP2005]

@Lucas-C thanks for the clarrification. @reingart I would like to work on issue. Is it assigned to someone