def gen10 ( ) : <EOL>
<INDENT>
for i in range ( 10 ) : <EOL>
<INDENT>
yield i <EOL>
<OUTDENT>
<OUTDENT>
def gen20 ( ) : <EOL>
<INDENT>
for i in range ( 10 , 20 ) : <EOL>
<INDENT>
yield i <EOL>
<OUTDENT>
<OUTDENT>
def generator ( ) : <EOL>
<INDENT>
yield from gen10 ( ) <EOL>
yield from gen20 ( ) <EOL>
