too many values to unpack iterating over a dict key string value list

Question

I am getting the  too many values to unpack  error  Any idea how I can fix this   first names     foo    bar   last names     gravy    snowman    fields          first names   first names       last name   last names             for field  possible values in fields     error happens on this line

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data      President   George   Bush   is         O   B-PERSON   I-PERSON   O   O    corpus      for doc tags  in data      doc tag          for word tag in zip doc tags           doc tag append  word tag           corpus append doc tag          print corpus

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You want to use iteritems  This returns an iterator over the dictionary  which gives you a tuple key  value    gt  gt  gt  for field  values in fields iteritems            print field  values      first names   foo    bar   last name   gravy    snowman     Your problem was that you were looping over fields  which returns the keys of the dictionary    gt  gt  gt  for field in fields          print field      first names last name

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In Python3 iteritems   is no longer supported Use  items for field  possible values in fields items        print field  possible values

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Python 2 You need to use something like iteritems  for field  possible values in fields iteritems        print field  possible values  See this answer for more information on iterating through dictionaries  such as using items    across python versions  Python 3 Since Python 3 iteritems   is no longer supported  Use items   instead  for field  possible values in fields items        print field  possible values

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you are missing fields iteritems   in your code   You could also do it other way  where you get values using keys in the dictionary   for key in fields      value   fields key

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For Python 3 x iteritems has been removed  Use items instead   for field  possible values in fields items        print field  possible values

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Can t be iterating directly in dictionary  So you can through converting into tuple   first names     foo    bar   last names     gravy    snowman    fields          first names   first names       last name   last names              tup field tuple fields items    for names in fields items         field possible values   names      tup possible values tuple possible values       for pvalue in tup possible values             print  field    is    pvalue

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For lists  use enumerate  for field  possible values in enumerate fields       print field  possible values    iteritems will not work for list objects

[python] 'too many values to unpack', iterating over a dict. key=>string, value=>list

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