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Understanding how to quote XML string in order to serialize using Python's ElementTree

Karim kliateni at gmail.com
Sat Jan 9 18:30:48 EST 2016 
Yes it changes your quotechar = "'" into quotechar = '"'

You should no more get the double quoting of the data string and no more 
slicing step.

Karim

On 10/01/2016 00:15, Saran Ahluwalia wrote:
> Thank you for the feedback on this. I believe that the excel dialect 
> includes just that:
>
> class excel(Dialect):
>      delimiter = ','
>      quotechar = '"'
>      doublequote = True
>      skipinitialspace = False
>      lineterminator = '\r\n'
>      quoting = QUOTE_MINIMAL
>
> On Sat, Jan 9, 2016 at 5:23 PM, Karim <kliateni at gmail.com 
> <mailto:kliateni at gmail.com>> wrote:
>
>
>
>     On 09/01/2016 21:54, kbtyo wrote:
>
>         My specs:
>
>         Python 3.4.3
>         Windows 7
>         IDE is Jupyter Notebooks
>
>         What I have referenced:
>
>         1)
>         http://stackoverflow.com/questions/1546717/python-escaping-strings-for-use-in-xml
>
>         2)
>         http://stackoverflow.com/questions/7802418/how-to-properly-escape-single-and-double-quotes
>
>         3)http://stackoverflow.com/questions/4972210/escaping-characters-in-a-xml-file-with-python
>
>
>         Here is the data (in CSV format) and script, respectively, (I
>         have tried variations on serializing Column 'E' using both Sax
>         and ElementTree):
>
>         i)
>
>         A,B,C,D,E,F,G,H,I,J
>         "3","8","1","<Request TransactionID="3"
>         RequestType="FOO"><InstitutionISO
>         /><CallID>23</CallID><MemberID>12</MemberID><MemberPassword
>         /><RequestData><AccountNumber>2</AccountNumber><AccountSuffix>85</AccountSuffix><AccountType>S</AccountType><MPIAcctType>Checking</MPIAcctType><TransactionCount>10</TransactionCount></RequestData></Request>","<Response
>         TransactionID="2"
>         RequestType="HoldInquiry"><ShareList>0000',0001,0070,</ShareList></Response>","1967-12-25
>         22:18:13.471000","2005-12-25 22:18:13.768000","2","70","0"
>
>         ii)
>
>         #!/usr/bin/python
>         # -*-  coding: utf-8 -*-
>         import os.path
>         import sys
>         import csv
>         from io import StringIO
>         import xml.etree.cElementTree as ElementTree
>         from xml.etree.ElementTree import XMLParser
>         import xml
>         import xml.sax
>         from xml.sax import ContentHandler
>
>         class MyHandler(xml.sax.handler.ContentHandler):
>              def __init__(self):
>                  self._charBuffer = []
>                  self._result = []
>
>              def _getCharacterData(self):
>                  data = ''.join(self._charBuffer).strip()
>                  self._charBuffer = []
>                  return data.strip() #remove strip() if whitespace is
>         important
>
>              def parse(self, f):
>                  xml.sax.parse(f, self)
>                  return self._result
>
>              def characters(self, data):
>                  self._charBuffer.append(data)
>
>              def startElement(self, name, attrs):
>                  if name == 'Response':
>                      self._result.append({})
>
>              def endElement(self, name):
>                  if not name == 'Response': self._result[-1][name] =
>         self._getCharacterData()
>
>         def read_data(path):
>              with open(path, 'rU', encoding='utf-8') as data:
>                  reader = csv.DictReader(data, delimiter =',',
>         quotechar="'", skipinitialspace=True)
>                  for row in reader:
>                      yield row
>
>         if __name__ == "__main__":
>              empty = ''
>              Response = 'sample.csv'
>              for idx, row in enumerate(read_data(Response)):
>                  if idx > 10: break
>                  data = row['E']
>                  print(data) # The before
>                  data = data[1:-1]
>                  data = ""'{}'"".format(data)
>                  print(data) # Sanity check
>         #         data = '<Response TransactionID="2"
>         RequestType="HoldInquiry"><ShareList>0000',0001,0070,</ShareList></Response>'
>                  try:
>                      root = ElementTree.XML(data)
>         #             print(root)
>                  except StopIteration:
>                      raise
>                      pass
>         #         xmlstring = StringIO(data)
>         #         print(xmlstring)
>         #         Handler = MyHandler().parse(xmlstring)
>
>
>         Specifically, due to the quoting in the CSV file (which is
>         beyond my control), I have had to resort to slicing the string
>         (line 51) and then formatting it (line 52).
>
>         However the print out from the above attempt is as follows:
>
>         "<Response TransactionID="2"
>         RequestType="HoldInquiry"><ShareList>0000'
>         <Response TransactionID="2"
>         RequestType="HoldInquiry"><ShareList>0000
>
>            File "<string>", line unknown
>         ParseError: no element found: line 1, column 69
>         Interestingly - if I assign the variable "data" (as in line
>         54) I receive this:
>
>            File "<ipython-input-80-7357c9272b92>", line 56
>         data = '<Response TransactionID="2"
>         RequestType="HoldInquiry"><ShareList>0000',0001,0070,</ShareList></Response>'
>                               ^
>         SyntaxError: invalid token
>
>         I seek feedback and information on how to address utilizing
>         the most Pythonic means to do so. Ideally, is there a method
>         that can leverage ElementTree. Thank you, in advance, for your
>         feedback and guidance.
>
>
>     In  fact to get rid of double quote simply create your csv reader
>     like that:
>
>     reader = csv.DictReader(data, dialect='excel', skipinitialspace=True)
>
>     You should then don't need to slice data variable and reformat it.
>
>     Karim
>
>
>
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