Python console rejects an object reference, having made an object with that reference as its name in previous line

[Simon Evans]

Dear Jussi, and Billy
I have changed the input in accordance with your advice, re:
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Python 2.7.6 (default, Nov 10 2013, 19:24:18) [MSC v.1500 32 bit (Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> from bs4 import BeautifulSoup
>>> with open("ecologicalpyramid.html","r") as ecological_pyramid:
...      soup = next(ecological_pyramid,"lxml")
...      producer_entries = soup.find("ul")
...      print(producer_entries.li.div.string)
... print(producer_entries.li.div.string)
  File "<stdin>", line 5
    print(producer_entries.li.div.string)
        ^
SyntaxError: invalid syntax
>>> print (producer_entries.li.div.string)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'producer_entries' is not defined
>>> from bs4 import BeautifulSoup
>>> with open("ecologicalpyramid.html","r") as ecological_pyramid:
...      soup = next(ecological_pyramid,"lxml")
...      producer_entries = soup.find("ul")
...      print(producer_entries.li.div.string)
...
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As no doubt you can see, the last line, indented as it is, does not provide the output that the book's text says it will return - ie the word 'plants'
If I do not indent it, it returns an 'invalid syntax error' stating that 'producer_entries' is not defined. Though code in the previous line is meant to do just that - isn't it ?