VTODO int cannot be int

[tieugene]

Code:

import vobject
v = vobject.iCalendar()
v.add('vtodo')
v.vtodo.add('sequence').value = 1
v.serialize()

Result:

...
  File "/usr/local/lib/python3.9/site-packages/vobject/base.py", line 1219, in backslashEscape
    s = s.replace("\\", "\\\\").replace(";", "\;").replace(",", "\,")
AttributeError: 'int' object has no attribute 'replace'

[tieugene]

The same with priority and percent-complete

[da4089]

The code is expecting a string value.

It seems like it'd be better to accept native integer types for integer values (and floats for floats, etc). I need to look at this a bit more, but superficially, it seems like native type values should be converted to strings, and only native string values should need backslash quoting.

The root of this seems to be that the line (a ContentLine instance) has its behavior set to TextBehavior.