Question 43

Explanation

Topics: def for range() yield

Try it yourself:

def fun(n):
    s = '+'
    for i in range(n):
        s += s
        yield s
 
 
for x in fun(2):
    print(x)
"""
++
++++
"""
 
 
def fun(n):
    s = '+'
    for i in range(n):
        s += s
        return s
 
 
for x in fun(2):
    print(x)
"""
+
+
"""

Explanation:

The generator function fun() will return two plus signs

in the first iteration and four in the second iteration.

yield does not end the function (like return does).

It continues at the same place in the second iteration

and s does not get set back to one plus sign.

At the beginning of the second iteration

s is still two plus signs and becomes four plus signs.

You do the same with return instead of yield

and you would get only two plus signs.

(There is a similar question Q569.)

Q468 (Please refer to this number, if you want to write me about this question.)