victorsubervi at gmail
Nov 20, 2009, 7:45 AM
Post #1 of 9
(1992 views)
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Too Many Values To Unpack
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Hi;
At one point Dennis Lee Bieber helped me with the following slightly
modified code:
#!/usr/bin/python
import sys,os
sys.path.append(os.getcwd())
import MySQLdb
from login import login
import re, string
def printTree(aTree, level=0):
tree = []
for name in sorted(aTree.keys()):
tree.append("%s%s") % ("\t" * level, name)
printTree(aTree[name], level + 1)
def expand(fetched):
aDict = {}
for (name, ) in fetched:
aDict[name] = {}
return aDict
def getChildren(levelDict, level = 0):
MAXLEVEL = 7
if level > MAXLEVEL:
return #possibly the data has a cycle/loop
for (nm, dt) in levelDict:
cursor.execute('''select c.name from categories as c
inner join relationship as r
on c.ID = r.Child
inner join categories as p
on r.Parent = p.ID
where p.category = %s
order by c.name''', (nm,))
levelDict[nm] = expand(cursor.fetchall())
# recursive call to do next level
getChildren(levelDict[nm], level + 1)
# no data return as we are mutating dictionaries in place
def catTree():
user, passwd, db, host = login()
database = MySQLdb.connect(host, user, passwd, db)
cursor = database.cursor()
cursor.execute('''create table if not exists categories
(ID int(3) unsigned primary key,
Category varchar(40),
Parent varchar(40))''')
cursor.execute('select Category, Parent from categories;')
data = cursor.fetchall()
cursor.execute('select Category from categories order by Parent, ID')
print data
Categories = [itm[0] for itm in cursor] #untuple single column
if len(Categories) > 0:
cursor.execute('select Parent from categories order by Parent, ID')
Parents = [itm[0] for itm in cursor]
MAXLEVEL = 15
cursor.execute('''create table if not exists categories
(ID integer auto_increment primary key,
Name varchar(40) not null,
unique (Name)
)''')
cursor.execute('''create table if not exists Relationship
(ID integer auto_increment primary key,
Parent integer not null,
foreign key (Parent) references categories (ID),
Child integer not null,
foreign key (Child) references categories (ID),
check (Parent <> Child) );''')
# get top level
print 'ok'
cursor.execute('select category from categories order by category')
theTree = expand(cursor.fetchall())
getChildren(theTree)
connection.commit()
return printTree(theTree)
else:
return ['There are no categories yet.']
catTree()
This throws the error:
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] Traceback (most
recent call last):
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] File
"/var/www/html/angrynates.com/cart/createCats.py", line 8, in ?
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] from catTree
import catTree
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] File
"/var/www/html/angrynates.com/cart/catTree.py", line 77, in ?
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] catTree()
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] File
"/var/www/html/angrynates.com/cart/catTree.py", line 71, in catTree
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58]
getChildren(theTree)
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] File
"/var/www/html/angrynates.com/cart/catTree.py", line 25, in getChildren
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] for (nm, dt)
in levelDict:
[Fri Nov 20 07:41:11 2009] [error] [client 208.84.198.58] ValueError: too
many values to unpack
There is only one category in "categories". Please advise.
Victor
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