def sort(self,key=None,buffer=1000):
return Sequence(itertools2.sorted_iterable(self, key, buffer))
def sort(self, key=None, buffer=100):
return Sequence(itertools2.sorted_iterable(self, key, buffer))
desc="Smallest member 'a' of the primitive Pythagorean triples (a,b,c) ordered by increasing c, then b"
A046086=Sequence(math2.primitive_triples,desc=desc).apply(lambda x:x[0])
# .sort(key=lambda x:x[2]) \ #not needed anymore
# .apply(lambda x:x[0])
""" found a bug in OEIS ! 20th term of the serie is 145, not 142 !
desc="Hypotenuse of primitive Pythagorean triangles sorted on area (A024406), then on hypotenuse"
A121727=Sequence(math2.primitive_triples,desc=desc) \
.sort(lambda x:(x[0]*x[1],x[2])) \
.apply(lambda x:x[2])
"""
# Build oeis dict by module introspection : Simple and WOW !
seqs=globals().copy()
oeis={}
for id in seqs:
if id[0]=='A' and len(id)==7:
seqs[id].name=id
oeis[id]=seqs[id]
if __name__ == "__main__":
"""local tests"""
it=itertools2.sorted_iterable(math2.primitive_triples(),(lambda x:(x[0]*x[1],x[2])))
for p in itertools2.take(30,it):
print(p,p[0]*p[1]/2)