我试图将一个avro文件读入Python，以下代码适用于OSX和Linux机箱但在Windows上中断：
from avro.datafile import DataFileReader, DataFileWriter
from avro.io import DatumReader, DatumWriter
reader = DataFileReader(open("my_file.avro", "rb"), DatumReader())
for line in reader:
print(line)
break
为什么我只在Windows上出现以下错误？
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
File "C:\Program Files\Python36\lib\site-packages\avro\datafile.py", line 351, in __init__
self._read_header()
File "C:\Program Files\Python36\lib\site-packages\avro\datafile.py", line 463, in _read_header
META_SCHEMA, META_SCHEMA, self.raw_decoder)
File "C:\Program Files\Python36\lib\site-packages\avro\io.py", line 526, in read_data
return self.read_record(writer_schema, reader_schema, decoder)
File "C:\Program Files\Python36\lib\site-packages\avro\io.py", line 726, in read_record
field_val = self.read_data(field.type, readers_field.type, decoder)
File "C:\Program Files\Python36\lib\site-packages\avro\io.py", line 522, in read_data
return self.read_map(writer_schema, reader_schema, decoder)
File "C:\Program Files\Python36\lib\site-packages\avro\io.py", line 657, in read_map
key = decoder.read_utf8()
File "C:\Program Files\Python36\lib\site-packages\avro\io.py", line 249, in read_utf8
input_bytes = self.read_bytes()
File "C:\Program Files\Python36\lib\site-packages\avro\io.py", line 241, in read_bytes
assert (nbytes >= 0), nbytes
AssertionError: -51
在Windows上使用avro-tools-1.8.2.jar时出现以下错误（在mac上使用avro-tools-1.8.2.jar）：
PS D:\Temp> java -jar avro-tools-1.8.2.jar tojson my_file.avro
log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" java.io.IOException: Not a data file.
at org.apache.avro.file.DataFileStream.initialize(DataFileStream.java:105)
at org.apache.avro.file.DataFileStream.<init>(DataFileStream.java:84)
at org.apache.avro.tool.DataFileReadTool.run(DataFileReadTool.java:71)
at org.apache.avro.tool.Main.run(Main.java:87)
at org.apache.avro.tool.Main.main(Main.java:76)