python - 这个 Python 单行代码是什么意思？

Question

s=p=1;exec"if s%p*s%~-~p:print`p`+','+`p+2`\ns*=p*p;p+=2\n"*999

Source.

Answer 1

这里是对基本思想的阐述。

# p = 1; s = p
s=p=1
#exec"if s%p*s%~-~p:print`p`+','+`p+2`\ns*=p*p;p+=2\n"*999
for i in range(999):
    # s%p = remainder of s/p
    # ~p = 1s complement of p
    if s%p*s%~-~p:
        # `p` = repr(p)
        print`p`+','+`p+2`
    # s = s*p*p
    s*=p*p
    # p = p+2
    p+=2