Re: ValueError: too many values to unpack,
J. Clifford Dyer a écrit : On Thu, Sep 27, 2007 at 09:50:26PM +0200, Bruno Desthuilliers wrote regarding Re: ValueError: too many values to unpack,: Shawn Minisall a ?crit : (snip) I did and it printed everything up until the 3rd line with 3 numbers for deposits. I have since figured it out...the teacher put in an extra tab after the last value so python thought it was 4 values for three. I went back into the file and deleted the extra tab after the 3rd number and saved it...now it's working fine. I'm going to kill her... You'd better learn how to deal with this-cant-happen-here situation, because it's how it is in real-life. And preferably learn how to deal with it in your code, not in the data that's given to you. Thanks for clarifying this point, which is of course what I meant. -- http://mail.python.org/mailman/listinfo/python-list
ValueError: too many values to unpack,
I am trying to read a few lines of a file with multiple values, the rest are single and are reading in fine. With the multiple value lines, python says this ValueError: too many values to unpack I've googled it and it says that happens when you have too few or too many strings that don't match with the variables in number your trying to assign them too. Below are the lines in reading in: line 3 - 19.1829.1578.75212.10 line 4 - 10020410.29 And this is the code I'm using: #read withdrawls from file on line3 line = infile.readline() #split withdrawls up withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, \t) #read deposits from file on line4 line = infile.readline() #split deposits up deposit1, deposit2, deposit3 = string.split(line, \t) I have 4 strings to match line 3 and 3 to match the 3 on line 4...any thoughts? thx -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack,
On Thu, 27 Sep 2007 12:36:58 -0400, Shawn Minisall wrote: With the multiple value lines, python says this ValueError: too many values to unpack I've googled it and it says that happens when you have too few or too many strings that don't match with the variables in number your trying to assign them too. Below are the lines in reading in: line 3 - 19.1829.1578.75212.10 line 4 - 10020410.29 And this is the code I'm using: #read withdrawls from file on line3 line = infile.readline() #split withdrawls up withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, \t) #read deposits from file on line4 line = infile.readline() #split deposits up deposit1, deposit2, deposit3 = string.split(line, \t) I have 4 strings to match line 3 and 3 to match the 3 on line 4...any thoughts? First thought is to find out which of the two lines triggers the exception. This information is part of the full traceback. Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
ValueError: too many values to unpack
I am trying to read a few lines of a file with multiple values, the rest are single and are reading in fine. With the multiple value lines, python says this ValueError: too many values to unpack I've googled it and it says that happens when you have too few or too many strings that don't match with the variables in number your trying to assign them too. Below are the lines in reading in: line 3 - 19.1829.1578.75212.10 line 4 - 10020410.29 And this is the code I'm using: #read withdrawls from file on line3 line = infile.readline() #split withdrawls up withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, \t) #read deposits from file on line4 line = infile.readline() #split deposits up deposit1, deposit2, deposit3 = string.split(line, \t) I have 4 strings to match line 3 and 3 to match the 3 on line 4...any thoughts? thx -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack,
Marc 'BlackJack' Rintsch wrote: On Thu, 27 Sep 2007 12:36:58 -0400, Shawn Minisall wrote: With the multiple value lines, python says this ValueError: too many values to unpack I've googled it and it says that happens when you have too few or too many strings that don't match with the variables in number your trying to assign them too. Below are the lines in reading in: line 3 - 19.1829.1578.75212.10 line 4 - 10020410.29 And this is the code I'm using: #read withdrawls from file on line3 line = infile.readline() #split withdrawls up withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, \t) #read deposits from file on line4 line = infile.readline() #split deposits up deposit1, deposit2, deposit3 = string.split(line, \t) I have 4 strings to match line 3 and 3 to match the 3 on line 4...any thoughts? First thought is to find out which of the two lines triggers the exception. This information is part of the full traceback. Ciao, Marc 'BlackJack' Rintsch Sorry, it looks like it's on the fourth line with the 3 values on line 4...its reading line 3 fine Traceback (most recent call last): File pyshell#0, line 1, in module main() File I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py, line 33, in main deposit1, deposit2, deposit3 = string.split(line, \t) ValueError: too many values to unpack -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack,
Shawn Minisall wrote: Sorry, it looks like it's on the fourth line with the 3 values on line 4...its reading line 3 fine Traceback (most recent call last): File pyshell#0, line 1, in module main() File I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py, line 33, in main deposit1, deposit2, deposit3 = string.split(line, \t) ValueError: too many values to unpack instead of fumbling around in the dark, try inserting a print statement before the offending line, so you can see what you're trying to unpack: print string.split(line, \t) # see what it is deposit1, deposit2, deposit3 = string.split(line, \t) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack,
Fredrik Lundh wrote: Shawn Minisall wrote: Sorry, it looks like it's on the fourth line with the 3 values on line 4...its reading line 3 fine Traceback (most recent call last): File pyshell#0, line 1, in module main() File I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py, line 33, in main deposit1, deposit2, deposit3 = string.split(line, \t) ValueError: too many values to unpack instead of fumbling around in the dark, try inserting a print statement before the offending line, so you can see what you're trying to unpack: print string.split(line, \t) # see what it is deposit1, deposit2, deposit3 = string.split(line, \t) /F I did and it printed everything up until the 3rd line with 3 numbers for deposits. I have since figured it out...the teacher put in an extra tab after the last value so python thought it was 4 values for three. I went back into the file and deleted the extra tab after the 3rd number and saved it...now it's working fine. I'm going to kill her... ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack,
Shawn Minisall a écrit : Fredrik Lundh wrote: Shawn Minisall wrote: Sorry, it looks like it's on the fourth line with the 3 values on line 4...its reading line 3 fine Traceback (most recent call last): File pyshell#0, line 1, in module main() File I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py, line 33, in main deposit1, deposit2, deposit3 = string.split(line, \t) ValueError: too many values to unpack instead of fumbling around in the dark, try inserting a print statement before the offending line, so you can see what you're trying to unpack: print string.split(line, \t) # see what it is deposit1, deposit2, deposit3 = string.split(line, \t) /F I did and it printed everything up until the 3rd line with 3 numbers for deposits. I have since figured it out...the teacher put in an extra tab after the last value so python thought it was 4 values for three. I went back into the file and deleted the extra tab after the 3rd number and saved it...now it's working fine. I'm going to kill her... You'd better learn how to deal with this-cant-happen-here situation, because it's how it is in real-life. -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
On Sep 27, 12:46 pm, Shawn Minisall [EMAIL PROTECTED] wrote: I am trying to read a few lines of a file with multiple values, the rest are single and are reading in fine. With the multiple value lines, python says this ValueError: too many values to unpack I've googled it and it says that happens when you have too few or too many strings that don't match with the variables in number your trying to assign them too. Below are the lines in reading in: line 3 - 19.1829.1578.75212.10 line 4 - 10020410.29 And this is the code I'm using: #read withdrawls from file on line3 line = infile.readline() #split withdrawls up withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, \t) #read deposits from file on line4 line = infile.readline() #split deposits up deposit1, deposit2, deposit3 = string.split(line, \t) I have 4 strings to match line 3 and 3 to match the 3 on line 4...any thoughts? thx Just print out the split without unpacking to see how many elements there are actually present: print string.split(line, \t) By the way, most functions of the string module are deprecated in favor of string methods; the above is better written as print line.split(\t) HTH, George -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack,
On Thu, Sep 27, 2007 at 09:50:26PM +0200, Bruno Desthuilliers wrote regarding Re: ValueError: too many values to unpack,: Shawn Minisall a ?crit : Fredrik Lundh wrote: Shawn Minisall wrote: Sorry, it looks like it's on the fourth line with the 3 values on line 4...its reading line 3 fine Traceback (most recent call last): File pyshell#0, line 1, in module main() File I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py, line 33, in main deposit1, deposit2, deposit3 = string.split(line, \t) ValueError: too many values to unpack instead of fumbling around in the dark, try inserting a print statement before the offending line, so you can see what you're trying to unpack: print string.split(line, \t) # see what it is deposit1, deposit2, deposit3 = string.split(line, \t) /F I did and it printed everything up until the 3rd line with 3 numbers for deposits. I have since figured it out...the teacher put in an extra tab after the last value so python thought it was 4 values for three. I went back into the file and deleted the extra tab after the 3rd number and saved it...now it's working fine. I'm going to kill her... You'd better learn how to deal with this-cant-happen-here situation, because it's how it is in real-life. And preferably learn how to deal with it in your code, not in the data that's given to you. I wouldn't be surprised if your teacher gave you that on purpose. There's an old maxim which I think applies here: Be liberal in what you accept and conservative in what you produce. Note that you have *not* come up with code that handles the dataset given to you by your professor. Do not expect full marks on this homework assignment, unless you go back and modify your code to handle extraneous tabs at the end of the line. Cheers, Cliff -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack,
Shawn Minisall wrote: Fredrik Lundh wrote: Shawn Minisall wrote: Sorry, it looks like it's on the fourth line with the 3 values on line 4...its reading line 3 fine Traceback (most recent call last): File pyshell#0, line 1, in module main() File I:\COMPUTER PROGRAMMING CLASS\PROJECT #1\project1.py, line 33, in main deposit1, deposit2, deposit3 = string.split(line, \t) ValueError: too many values to unpack instead of fumbling around in the dark, try inserting a print statement before the offending line, so you can see what you're trying to unpack: print string.split(line, \t) # see what it is deposit1, deposit2, deposit3 = string.split(line, \t) /F I did and it printed everything up until the 3rd line with 3 numbers for deposits. I have since figured it out...the teacher put in an extra tab after the last value so python thought it was 4 values for three. I went back into the file and deleted the extra tab after the 3rd number and saved it...now it's working fine. I'm going to kill her... ;) Alternatively you could use the additional argument to split() that tells is the maximum number of splits to [erforms, then strip any trailing whitespace off before using the values. That way tou might get an extra mark for not amending the data file. It's called defensive programming, and you need t take it seriously (as does everyone who programs). regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Sorry, the dog ate my .sigline -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
Zentrader wrote: On Sep 27, 9:46 am, Shawn Minisall [EMAIL PROTECTED] wrote: line 3 - 19.1829.1578.75212.10 line 4 - 10020410.29 And this is the code I'm using: #read withdrawls from file on line3 line = infile.readline() #split withdrawls up withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, \t) #read deposits from file on line4 line = infile.readline() #split deposits up deposit1, deposit2, deposit3 = string.split(line, \t) I have 4 strings to match line 3 and 3 to match the 3 on line 4...any thoughts? A string.split returns a list so you don't have to know how many elements there are beforehand. A simple example withdraw = line.split(\t) if len(withdraw) == 3: match_3(withdraw) elif len(withdraw) == 4:: match_4(withdraw) else: print line.split() is not 3 or 4, withdraw Right, and then because error was caused for an unexpected extra tab you made the deposit pass as a withdrawal... Not everybody trades just Zen :) (tip: the unpacking mystery has been solved earlier this day) Regards, Pablo -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
On Sep 27, 9:46 am, Shawn Minisall [EMAIL PROTECTED] wrote: I am trying to read a few lines of a file with multiple values, the rest are single and are reading in fine. With the multiple value lines, python says this ValueError: too many values to unpack I've googled it and it says that happens when you have too few or too many strings that don't match with the variables in number your trying to assign them too. Below are the lines in reading in: line 3 - 19.1829.1578.75212.10 line 4 - 10020410.29 And this is the code I'm using: #read withdrawls from file on line3 line = infile.readline() #split withdrawls up withdraw1, withdraw2, withdraw3, withdraw4 = string.split(line, \t) #read deposits from file on line4 line = infile.readline() #split deposits up deposit1, deposit2, deposit3 = string.split(line, \t) I have 4 strings to match line 3 and 3 to match the 3 on line 4...any thoughts? thx A string.split returns a list so you don't have to know how many elements there are beforehand. A simple example withdraw = line.split(\t) if len(withdraw) == 3: match_3(withdraw) elif len(withdraw) == 4:: match_4(withdraw) else: print line.split() is not 3 or 4, withdraw -- http://mail.python.org/mailman/listinfo/python-list
ValueError: too many values to unpack
Trying to use CSV to read in a line with 11 fields and I keep getting this error. I have googled a bit and have been unable to figure it out. -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
That happens when you try something like this: a,b,c = [1,2,3,4] It means there are more items on the right side than the left. You probably have 11 variables on the left side. On Apr 11, 10:13 am, fscked [EMAIL PROTECTED] wrote: Trying to use CSV to read in a line with 11 fields and I keep getting this error. I have googled a bit and have been unable to figure it out. -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
fscked írta: Trying to use CSV to read in a line with 11 fields and I keep getting this error. I have googled a bit and have been unable to figure it out. Probably you have more than 11 values in some (or all) of the rows in the CSV file. Try this code: L = (1,2,3,4,5) a1,a2,a3 = L If you are sure that you only need a certain number of values, the first N columns: a1,a2,a3 = L[:3] Then you still can have a not enough values to unpack error, guess what that means. ;-) Laszlo -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
On Apr 11, 10:26 am, Laszlo Nagy [EMAIL PROTECTED] wrote:
fscked írta: Trying to use CSV to read in a line with 11 fields and I keep
getting
this error. I have googled a bit and have been unable to figure it out.
Probably you have more than 11 values in some (or all) of the rows in
the CSV file. Try this code:
L = (1,2,3,4,5)
a1,a2,a3 = L
If you are sure that you only need a certain number of values, the
first N columns:
a1,a2,a3 = L[:3]
Then you still can have a not enough values to unpack error, guess
what that means. ;-)
Laszlo
Hmm, well I have counted the fields in the CSV and verified there are
only 11. Here is the offending code:
myfile = open('ClientsXMLUpdate.csv')
csvreader = csv.reader(myfile)
for boxid, mac, activated, hw_ver, sw_ver, heartbeat, name, address,
phone, country, city in csvreader:
mainbox = SubElement(root, {Boxes}box)
mainbox.attrib[city] = city
mainbox.attrib[country] = country
mainbox.attrib[phone] = phone
mainbox.attrib[address] = address
mainbox.attrib[name] = name
mainbox.attrib[pl_heartbeat] = heartbeat
mainbox.attrib[sw_ver] = sw_ver
mainbox.attrib[hw_ver] = hw_ver
mainbox.attrib[date_activated] = activated
mainbox.attrib[mac_address] = mac
mainbox.attrib[boxid] = boxid
I just don't get it... :/
--
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Re: ValueError: too many values to unpack
Hmm, well I have counted the fields in the CSV and verified there are only 11. Here is the offending code: Try this instead: lineno = 0 for values in csvreader: try: lineno += 1 boxid, mac, activated, hw_ver, sw_ver, heartbeat, name, address,phone, country, city = values except: print Problem at line #,lineno print repr(values) break Or even: lineno = 0 for values in csvreader: lineno += 1 if len(values) != 11: print Problem at line #,lineno print repr(values) Best, Laszlo -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
En Wed, 11 Apr 2007 16:28:08 -0300, fscked [EMAIL PROTECTED]
escribió:
Trying to use CSV to read in a line with 11 fields and I keep getting
this error. I have googled a bit and have been unable to figure it
myfile = open('ClientsXMLUpdate.csv')
csvreader = csv.reader(myfile)
for boxid, mac, activated, hw_ver, sw_ver, heartbeat, name, address,
phone, country, city in csvreader:
mainbox = SubElement(root, {Boxes}box)
[...]
You say all rows have 11 fields, the csv module insists on an error... try
using some print statements to see who is right:
for index, items in enumerate(csvreader):
print index, len(items)
if len(items)!=11: print items
--
Gabriel Genellina
--
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Re: ValueError: too many values to unpack
On Apr 12, 5:28 am, fscked [EMAIL PROTECTED] wrote:
On Apr 11, 10:26 am, Laszlo Nagy [EMAIL PROTECTED] wrote:
fscked írta: Trying to use CSV to read in a line with 11 fields and I keep
getting
this error. I have googled a bit and have been unable to figure it out.
Probably you have more than 11 values in some (or all) of the rows in
the CSV file. Try this code:
L = (1,2,3,4,5)
a1,a2,a3 = L
If you are sure that you only need a certain number of values, the
first N columns:
a1,a2,a3 = L[:3]
Then you still can have a not enough values to unpack error, guess
what that means. ;-)
Laszlo
Hmm, well I have counted the fields in the CSV and verified there are
only 11.
Counted how? Checked each line in the file? Let Python do it; see
below.
Here is the offending code:
myfile = open('ClientsXMLUpdate.csv')
Put in a second arg of 'rb'; if not the case now, someone might run
your code on Windows some day.
What platform, what version of Python?
csvreader = csv.reader(myfile)
for boxid, mac, activated, hw_ver, sw_ver, heartbeat, name, address,
phone, country, city in csvreader:
Not exactly bullet-proof code.
I just don't get it... :/
Possibly (in one or more rows) the address field has a comma in it and
it's not quoted properly.
Try writing your code in a more defensive fashion:
ENCOLS = 11
rownum = 0
for row in csvreader:
rownum += 1
ancols = len(row)
if ancols != ENCOLS:
print Row %d has %d columns (expected %d) \
% (rownum, ancols, ENCOLS)
print row
# pass/return/continue/break/raise/call error logger .
(boxid, mac, activated, hw_ver,
sw_ver, heartbeat, name, address,
phone, country, city) = row
HTH,
John
--
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Re: ValueError: too many values to unpack
You guys have given me some great ideas, I am going to try them all out and let you guys know how it turns out. On a side note, thanks for nto bashing a noob like me who isn't the greatest pythonista around. I am trying to learn and you guys are how I learn my mistakes. Well you, and the fact the stuff occasionally doesn't work. :) Thanks again and I will report back in a couple hours (meetings). -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
Laszlo Nagy a écrit : (snip) Try this instead: lineno = 0 for values in csvreader: try: lineno += 1 Laszlo, may I suggest using enumerate() here instead ?-) for lineno, row in enumerate(csvreader): print line %s % lineno+1 # want 1-based numbering -- http://mail.python.org/mailman/listinfo/python-list
ValueError: too many values to unpack
Hi, I am very new to pyton, during my adventures journey I got the following error message which am not able to solve, can somebody help me. I was trying to format my output in a readable way, Compare results in tblItem 71 records found in pctrsqlstage case9125 71 records found in qa-sql2\pctr case9126 Database counts match: True 71 unique records found in pctrsqlstage case9125 71 unique records found in qa-sql2\pctr case9126 56 records were different Type, FileType, Item, Hash, Path, Size, CullCd, Ext, DtCr, DtLMd, DtLAc Traceback (most recent call last): File C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py, line 310, in RunScript exec codeObject in __main__.__dict__ File Q:\PythonScripts\InventoryCompareCase.py, line 234, in ? main() File Q:\PythonScripts\InventoryCompareCase.py, line 117, in main for (Type,FileType,Item,Hash,Path,Size,CullCd,Ext,DtCr,DtLMd,DtLAc) in infoDiffs : ValueError: too many values to unpack Thanks Retheesh -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
[EMAIL PROTECTED] wrote: snip 56 records were different Type, FileType, Item, Hash, Path, Size, CullCd, Ext, DtCr, DtLMd, DtLAc Traceback (most recent call last): File C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py, line 310, in RunScript exec codeObject in __main__.__dict__ File Q:\PythonScripts\InventoryCompareCase.py, line 234, in ? main() File Q:\PythonScripts\InventoryCompareCase.py, line 117, in main for (Type,FileType,Item,Hash,Path,Size,CullCd,Ext,DtCr,DtLMd,DtLAc) in infoDiffs : ValueError: too many values to unpack Thanks Retheesh The too many values to unpack indicates you don't have enough variables in the [for (...) in infoDiffs: ] construct. You also may want to change some of the names; although Type (variable name) and type (python function) should be different, it's good practice to not use names that are similar to functions. -- http://mail.python.org/mailman/listinfo/python-list
Re: ValueError: too many values to unpack
Thank you, that solved my problem. Thanks Retheesh alisonken1 wrote: [EMAIL PROTECTED] wrote: snip 56 records were different Type, FileType, Item, Hash, Path, Size, CullCd, Ext, DtCr, DtLMd, DtLAc Traceback (most recent call last): File C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py, line 310, in RunScript exec codeObject in __main__.__dict__ File Q:\PythonScripts\InventoryCompareCase.py, line 234, in ? main() File Q:\PythonScripts\InventoryCompareCase.py, line 117, in main for (Type,FileType,Item,Hash,Path,Size,CullCd,Ext,DtCr,DtLMd,DtLAc) in infoDiffs : ValueError: too many values to unpack Thanks Retheesh The too many values to unpack indicates you don't have enough variables in the [for (...) in infoDiffs: ] construct. You also may want to change some of the names; although Type (variable name) and type (python function) should be different, it's good practice to not use names that are similar to functions. -- http://mail.python.org/mailman/listinfo/python-list
