Hi, Does anyone know how to put an assertion in list comprehension? I have the following list comprehension, but I want to use an assertion to check the contents of rec_stdl. I ended up using another loop which essentially duplicates the functions of list comprehension. It just look like a waste of coding and computer time to me.
I just wish I could put the assertions into list comprehensions. x=[(rec_stdl[0].st/10000.0, rec_stdl[0].cl, rec_stdl[0].bb, rec_stdl[0].bo, rec_stdl[1].bb, rec_stdl[1].bo, rec_stdl[0].ex ) for rec_stdl in rec_by_ex if len(rec_stdl)==2 ] #duplicated loop if __debug__: for rec_stdl in rec_by_ex: l=len(rec_stdl) assert(l<=2 and l>0) if l==2: assert(rec_stdl[0].c=="C" and rec_stdl[1].c=="P") assert(rec_stdl[0].ex==rec_stdl[1].ex) assert(rec_stdl[0].st==rec_stdl[1].st) assert(rec_stdl[0].cp==rec_stdl[1].cp) Thanks, Geoffrey -- http://mail.python.org/mailman/listinfo/python-list