Python Error Valueerror Too Many Values To Unpack
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Valueerror: Too Many Values To Unpack Split
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Valueerror: Too Many Values To Unpack Opencv
many values to unpack [duplicate] up vote 72 down vote favorite 14 This question already has an answer here: 'too many values to unpack', iterating over a dict. key=>string, value=>list 3 answers I am getting that exception from this code: class Transaction: def __init__ (self): self.materials = {} def add_material (self, m): self.materials[m.type + m.purity] = m def serialize (self): ser_str = 'transaction_start\n' for valueerror: too many values to unpack pandas k, m in self.materials: ser_str += m.serialize () sert += 'transaction_end\n' return ser_str The for line is the one throwing the exception. The ms are Material objects. Anybody have any ideas why? python share|improve this question edited Aug 13 '11 at 23:16 Johnsyweb 69.2k13112168 asked Aug 13 '11 at 21:59 Nik 3,67283465 marked as duplicate by davidismpython Users with the python badge can single-handedly close python questions as duplicates and reopen them as needed. Mar 12 at 18:58 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. add a comment| 3 Answers 3 active oldest votes up vote 104 down vote accepted self.materials is a dict and by default you are iterating over just the keys (which are strings). Since self.materials has more than two keys*, they can't be unpacked into the tuple "k, m", hence the ValueError exception is raised. In Python 2.x, to iterate over the keys and the values (the tuple "k, m"), we use self.materials.iteritems(). However, since you're throwing the key away anyway, you may as well simply iterate over the diction
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Valueerror: Too Many Values To Unpack Tuple
Tools = Happy People Communication Discuss Mailing Lists Notes Timesheet Email Marketing valueerror: too many values to unpack spark Events Survey Live Chat Odoo Studio | Third party apps Tour Pricing Community Docs Odoo Help Welcome! python too many values to unpack (expected 2) This community is for beginners and experts willing to share their Odoo knowledge. It's not a forum to discuss ideas, but a knowledge base of questions and their answers. http://stackoverflow.com/questions/7053551/python-valueerror-too-many-values-to-unpack Hide Intro Register Toggle navigation Help Trending Newest People Tags Badges Ask a Question 0 What means "Too many values to unpack" message? python By Mohammed Osman Gomda on 4/16/13, 5:23 PM • 19,169 views Can any one give me the cause of the above error message Flag Reply Comment Share Some context may help. Anyway, in python normally https://www.odoo.com/forum/help-1/question/what-means-too-many-values-to-unpack-message-11679 means you are trying to unpack a tuple with more values repect to target variables. Example: a,b = returnATupleOfMoreThan2Values() Jethroso on 4/16/13, 5:39 PM Post 1 Nicolas Bessi --Nicolas Bessi-- Odoo S.A. http://www.odoo.com 1590 | 5 7 8 Lausanne, Switzerland --Nicolas Bessi-- Nicolas Bessi On 4/16/13, 5:41 PM It is a Python exception that is the most ofen risen during assignation error: You try to do multiple assignment : a, b = (1, 2, 3) # There is too many value to unpack ;) a, b = (1, 2) # That will work a, b = 'base.main_company'.split('.') # OK a, b = 'base.main.company'.split('.') # KO In OpenERP it generaly comes when there is a dot in an XML ID. Perfect Forum View Course » View Exercise 564 points Submitted by SeohyunW over 2 years ago "Too many values to unpack" error?! in the anti_vowel exercise, I https://www.codecademy.com/en/forum_questions/539d426e52f863349c00049d built my code: def anti_vowel(text): vowels = ["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"] for word, vowel in (text, vowels): if vowel == word: word = "" return text and http://www.markhneedham.com/blog/2015/01/12/python-counter-valueerror-too-many-values-to-unpack/ the codecademy says that 'there's too many values to unpack' error, while the console says None. Why does this happen? is this to do with efficiency? 0 votes permalink first off, use too many the formatting tools when you post code not efficiency, that won't work at all you are iterating over (text, vowels), that is a tuple of 2 values, your loop will iterate twice and for each of those values you are asking python to unpack 2 values, but there is only one value in text, so you can't unpack 2 values and there are lots too many values of values in vowels so it won't know which two to pick so you are trying to use features of python that you have probably not yet learned, here's a short example: a = ['bob', 'jane'] b = ['charles', 'kate'] pairs = [a, b] for boy, girl in pairs: print boy, girl output: bob jane charles kate and another example, iterating over keys and values of a dictionary: squares = {} for n in range(10): squares[n] = n ** 2 # print out the contents of the squares dict for key, value in squares.items(): print key, value output: 0 0 1 1 2 4 3 9 4 16 5 25 6 36 7 49 8 64 9 81 if what you intended was to loop thru each character and for each character loop through each vowel and test for a match then you will need 2 loops, one within the other also, use str.upper or str.lower rather than store both upper and lower case vowels you can also use in to see if a value is in a collection: if 'a' in vowels: 1585 points Submitted by Jonatan over 2 years ago a list. In my case I was trying to work out how many times words occurred in a corpus so I had something like the following: >> from collections import Counter >> counter = Counter(["word1", "word2", "word3", "word1"]) >> print counter Counter({'word1': 2, 'word3': 1, 'word2': 1}) I wanted to write a for loop to iterate over the counter and print the (key, value) pairs and started with the following: >>> for key, value in counter: ... print key, value ... Traceback (most recent call last): File "