ValueError in int <-> str conversions

[tueda]

In complicated systems, it is often the case that fixing your bug causes a new bug for others. The latest CPython bugfix releases have introduced a breaking change in conversions between large integers and strings. So far, no alternate API has been provided except for changing global settings (which is not appropriate for libraries).

There are at least 3 places in this library affected by this change.

donuts-python/donuts/poly.py

Line 74 in 5791d9c

self._raw = _RawPolynomial(str(value))

python -c 'import donuts; donuts.Polynomial(10**4300)'

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/donuts/poly.py", line 74, in __init__
    self._raw = _RawPolynomial(str(value))
ValueError: Exceeds the limit (4300) for integer string conversion

donuts-python/donuts/poly.py

Line 266 in 5791d9c

return int(str(self))

python -c 'import donuts; (donuts.Polynomial(10)**4300).as_integer'

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/donuts/poly.py", line 266, in as_integer
    return int(str(self))
ValueError: Exceeds the limit (4300) for integer string conversion: value has 4301 digits

donuts-python/donuts/rat.py

Line 64 in 5791d9c

self._raw = _RawRationalFunction(str(numerator))

python -c 'import donuts; donuts.RationalFunction(10**4300)'

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/donuts/rat.py", line 64, in __init__
    self._raw = _RawRationalFunction(str(numerator))
ValueError: Exceeds the limit (4300) for integer string conversion