P. Portilla - 1 year ago 39

Python Question

Im trying to work on some group theory with Sage.

In particular I was trying to learn the basic commands related to symmetric groups.

My input is

`G=SymmetricGroup(6)`

sigma=G('(1,3,5)(4,6)')

then I use

`sigma.cycle_type()`

`---------------------------------------------------------------------------`

AttributeError Traceback (most recent call last)

<ipython-input-25-94f73ca80516> in <module>()

----> 1 sigma.cycle_type()

/home/sage/sage-7.2/src/sage/structure/element.pyx in sage.structure.element.Element.__getattr__ (/home/sage/sage-7.2/src/build/cythonized/sage/structure/element.c:4649)()

411 dummy_error_message.name = name

412 raise dummy_attribute_error

--> 413 return getattr_from_other_class(self, P._abstract_element_class, name)

414

415 def __dir__(self):

/home/sage/sage-7.2/src/sage/structure/misc.pyx in sage.structure.misc.getattr_from_other_class (/home/sage/sage-7.2/src/build/cythonized/sage/structure/misc.c:1870)()

257 dummy_error_message.cls = type(self)

258 dummy_error_message.name = name

--> 259 raise dummy_attribute_error

260 if isinstance(attribute, methodwrapper):

261 dummy_error_message.cls = type(self)

AttributeError: 'sage.groups.perm_gps.permgroup_element.SymmetricGroupElement' object has no attribute 'cycle_type'

What am I doing wrong?

Answer Source

Possibly you just need a newer version of Sage? In a late beta of 7.3, I get:

```
sage: sigma.cycle_type()
[3, 2, 1]
```

I should point out that the version in SageMathCloud appears to be too old for this currently, if that's your platform...