你需要yield from递归。

def generator_recursion(n):
    if n < 0:
        return
    else:
        yield from generator_recursion(n-1)
        yield n
    
gr = generator_recursion(4)
for k in gr:
    print(k)

这将打印：

0
1
2
3
4

​

你必须从递归子进程yield-

def generator_recursion(n):
    if n < 0:
        return
    else:
        for k in generator_recursion(n-1): # ✅ for k in sub-process
            yield k  # ✅ yield sub-process values
        yield n

因为generator_recursion是从递归调用中正确地yield ing出来的，所以现在您将看到正确的输出-

gr = generator_recursion(4)
for k in gr:
   print(k)

正如您所了解的，这正是yield from …所实现的-

def generator_recursion(n):
    if n < 0:
        return
    else:
        yield from generator_recursion(n-1) # ✅ equivalent to above
        yield n