256以内:
c1,c2=1,1
print(id(c1),id(c2))
140726863360272 140726863360272
c1, c2 = 256, 256
print(id(c1), id(c2))
140726863368432 140726863368432
超出256:
c1, c2 = 257, 257
print(id(c1), id(c2))
2969533204656 2969533204528
c1, c2 = 1200, 1200
print(id(c1), id(c2))
2421102004400 2421102004272