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Avro, mail # user - avro-1.7.4 for python throws exception on Windows server 2008


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avro-1.7.4 for python throws exception on Windows server 2008
Павел Мезенцев 2013-05-24, 13:45
Hello, friends!

I am newbie in avro and try to put my data into this container. But it is
failing with exception.
I found that code like that:

# -*- coding: utf-8 -*-
from avro import schema
from avro import io
from avro import datafile

schema_object = schema.parse (u"""{
      "type": "record",
      "name": "unicode_values",
      "fields": [ { "name": "value", "type": "string"}]
    }""")

dfw = datafile.DataFileWriter (open ("test.avro", "wb"), io.DatumWriter (),
schema_object)
dfw.append ({u"value" : u"95/44"})
dfw.append ({u"value" : u"238"})
dfw.append ({u"value" : u"103/20"})
dfw.append ({u"value" : u"117"})
dfw.append ({u"value" : u"936"})
dfw.append ({u"value" : u"226/407"})
dfw.append ({u"value" : u"217/43"})
dfw.append ({u"value" : u"45/4"})
dfw.append ({u"value" : u"654"})
dfw.append ({u"value" : u"217/23"})
dfw.append ({u"value" : u"1022200571470"})
dfw.close ()

# ======================reader = datafile.DataFileReader (open ("test.avro", "r"), io.DatumReader())
for value in reader:
    print value
reader.close ()
failing with exception
Traceback (most recent call last):
  File "sandbox/write_avro.py", line 28, in <module>
    for value in reader:
  File
"C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\datafile.py", line
362, in next
    datum = self.datum_reader.read(self.datum_decoder)
  File "C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\io.py",
line 445, in read
    return self.read_data(self.writers_schema, self.readers_schema, decoder)
  File "C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\io.py",
line 490, in read_data
    return self.read_record(writers_schema, readers_schema, decoder)
  File "C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\io.py",
line 690, in read_record
    field_val = self.read_data(field.type, readers_field.type, decoder)
  File "C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\io.py",
line 468, in read_data
    return decoder.read_utf8()
  File "C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\io.py",
line 233, in read_utf8
    return unicode(self.read_bytes(), "utf-8")
  File "C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\io.py",
line 226, in read_bytes
    return self.read(self.read_long())
  File "C:\Anaconda\lib\site-packages\avro-1.7.4-py2.7.egg\avro\io.py",
line 184, in read_long
    b = ord(self.read(1))
TypeError: ord() expected a character, but string of length 0 found
Tell me, what i do wrong?
Is there any workaround to avoid this exception?
Best regards,
Mezentsev Pavel
+
Miki Tebeka 2013-05-28, 16:53