RuntimeError: maximum recursion depth exceeded with Python 3.2 pickle.dump
<p>I'm getting the above error with the code below. The error occurs at the last line. Please excuse the subject matter, I'm just practicing my python skills. =)</p>

<pre><code>from urllib.request import urlopen
from bs4 import BeautifulSoup
from pprint import pprint
from pickle import dump

moves = dict()
moves0 = set()
url = 'http://www.marriland.com/pokedex/1-bulbasaur'
print(url)
# Open url
with urlopen(url) as usock:
    # Get url data source
    data = usock.read().decode("latin-1")
    # Soupify
    soup = BeautifulSoup(data)
    # Find move tables
    for div_class1 in soup.find_all('div', {'class': 'listing-container listing-container-table'}):
        div_class2 = div_class1.find_all('div', {'class': 'listing-header'})
        if len(div_class2) &gt; 1:
            header = div_class2[0].find_all(text=True)[1]
            # Take only moves from Level Up, TM / HM, and Tutor
            if header in ['Level Up', 'TM / HM', 'Tutor']:
                # Get rows
                for row in div_class1.find_all('tbody')[0].find_all('tr'):
                    # Get cells
                    cells = row.find_all('td')
                    # Get move name
                    move = cells[1].find_all(text=True)[0]
                    # If move is new
                    if not move in moves:
                        # Get type
                        typ = cells[2].find_all(text=True)[0]
                        # Get category
                        cat = cells[3].find_all(text=True)[0]
                        # Get power if not Status or Support
                        power = '--'
                        if cat != 'Status or Support':
                            try:
                                # not STAB
                                power = int(cells[4].find_all(text=True)[1].strip(' \t\r\n'))
                            except ValueError:
                                try:
                                    # STAB
                                    power = int(cells[4].find_all(text=True)[-2])
                                except ValueError:
                                    # Moves like Return, Frustration, etc.
                                    power = cells[4].find_all(text=True)[-2]
                        # Get accuracy
                        acc = cells[5].find_all(text=True)[0]
                        # Get pp
                        pp = cells[6].find_all(text=True)[0]
                        # Add move to dict
                        moves[move] = {'type': typ,
                                       'cat': cat,
                                       'power': power,
                                       'acc': acc,
                                       'pp': pp}
                    # Add move to pokemon's move set
                    moves0.add(move)

    pprint(moves)
    dump(moves, open('pkmn_moves.dump', 'wb'))
</code></pre>

<p>I have reduced the code as much as possible in order to produce the error. The fault may be simple, but I can't just find it. In the meantime, I made a workaround by setting the recursion limit to 10000. </p>
