在for循环python中捕获错误 [英] Catch error in a for loop python
本文介绍了在for循环python中捕获错误的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我在avro数据读取器对象上有一个for循环
I have a for loop on an avro data reader object
for i in reader:
print i
然后在for语句中出现unicode解码错误,因此我想忽略该特定记录.所以我做到了
then I got a unicode decode error in the for statement so I wanted to ignore that particular record. So I did this
try:
for i in reader:
print i
except:
pass
,但不再继续.我该如何克服这个问题
but it does not continue further. How can I overcome this problem
添加了错误跟踪
Traceback (most recent call last):
File "modify.py", line 22, in <module>
for record in reader:
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/datafile.py", line 362, in next
datum = self.datum_reader.read(self.datum_decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 445, in read
return self.read_data(self.writers_schema, self.readers_schema, decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 490, in read_data
return self.read_record(writers_schema, readers_schema, decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 690, in read_record
field_val = self.read_data(field.type, readers_field.type, decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 468, in read_data
return decoder.read_utf8()
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 233, in read_utf8
return unicode(self.read_bytes(), "utf-8")
UnicodeDecodeError: 'utf8' codec can't decode byte 0xb4 in position 14: invalid start byte
是否可能是由于文件已损坏?
could it be due to the fact that the file was corrupted?
Edit2: 按照回答遍历iterobject的建议,我修改了代码并得到了这个错误
As per suggestion in answers to go through iterobject I modified code and got this error
Traceback (most recent call last):
File "modify.py", line 28, in <module>
print next(iterobject)["filepath"]
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/datafile.py", line 362, in next
datum = self.datum_reader.read(self.datum_decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 445, in read
return self.read_data(self.writers_schema, self.readers_schema, decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 490, in read_data
return self.read_record(writers_schema, readers_schema, decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 690, in read_record
field_val = self.read_data(field.type, readers_field.type, decoder)
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 468, in read_data
return decoder.read_utf8()
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 233, in read_utf8
return unicode(self.read_bytes(), "utf-8")
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.egg/avro/io.py", line 226, in read_bytes
return self.read(self.read_long())
File "/usr/lib/python2.6/site-packages/avro-1.7.7-py2.6.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
推荐答案
如果您的错误是在for i in
中.然后尝试此操作,如果UnicodeDecodeError
发生,它将跳过迭代器中的元素.
If your error is in for i in
. Then try this, it will skip element in iterator if UnicodeDecodeError
occurs.
iterobject = iter(reader)
while iterobject:
try:
print(next(iterobject))
except StopIteration:
break
except UnicodeDecodeError:
pass
这篇关于在for循环python中捕获错误的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文