Unique name in def

[floRoth]

Some programs can´t open cells with characters ?$ in the cellname. So i just replaced it with ab. In core.py line 2213

Should work now.

Greetings Flo

def _compact_id(obj): """ Return the id of the object as an ascii string.

This is guaranteed to be unique, and uses only characters that are permitted
in valid GDSII names.
"""

i=bin(id(obj))[2:]
#chars=string.ascii_uppercase+string.ascii_lowercase+string.digits+'?$'
chars=string.ascii_uppercase+string.ascii_lowercase+string.digits+'ab'
out=''
while len(i):
    s=int(i[-6:], base=2)
    out+=chars[s]
    i=i[:-6]

return out[::-1]

[floRoth]

Solution see above.