我正在努力写下#34;好" python并捕获S3没有这样的关键错误:
session = botocore.session.get_session()
client = session.create_client('s3')
try:
client.get_object(Bucket=BUCKET, Key=FILE)
except NoSuchKey as e:
print >> sys.stderr, "no such key in bucket"
但NoSuchKey尚未定义,我无法将其追踪到我需要定义的导入。
e.__class__
为botocore.errorfactory.NoSuchKey
但from botocore.errorfactory import NoSuchKey
出错,from botocore.errorfactory import *
也无效,我也不想捕获一般错误。
答案 0 :(得分:63)
from botocore.exceptions import ClientError
try:
response = self.client.get_object(Bucket=bucket, Key=key)
return json.loads(response["Body"].read())
except ClientError as ex:
if ex.response['Error']['Code'] == 'NoSuchKey':
logger.info('No object found - returning empty')
return dict()
else:
raise ex
答案 1 :(得分:29)
使用botocore 1.5,看起来客户端句柄暴露了异常类:
session = botocore.session.get_session()
client = session.create_client('s3')
try:
client.get_object(Bucket=BUCKET, Key=FILE)
except client.exceptions.NoSuchKey as e:
print >> sys.stderr, "no such key in bucket"
答案 2 :(得分:8)
我认为最优雅的方法是在Boto3中
session = botocore.session.get_session()
client = session.create_client('s3')
try:
client.get_object(Bucket=BUCKET, Key=FILE)
except client.exceptions.NoSuchKey:
print("no such key in bucket")
有关错误处理的文档似乎很少,但以下内容会打印出适用于的错误代码:
session = botocore.session.get_session()
client = session.create_client('s3')
try:
try:
client.get_object(Bucket=BUCKET, Key=FILE)
except client.exceptions.InvalidBucketName:
print("no such key in bucket")
except AttributeError as err:
print(err)
< botocore.errorfactory.S3Exceptions对象位于0x105e08c50>对象没有属性' InvalidBucketName'。有效的例外有:BucketAlreadyExists,BucketAlreadyOwnedByYou,NoSuchBucket,NoSuchKey,NoSuchUpload,ObjectAlreadyInActiveTierError,ObjectNotInActiveTierError
答案 3 :(得分:7)
在boto3中,我能够访问资源的元客户端中的异常。
import boto3
s3 = boto3.resource('s3')
s3_object = s3.Object(bucket_name, key)
try:
content = s3_object.get()['Body'].read().decode('utf-8')
except s3.meta.client.exceptions.NoSuchKey:
print("no such key in bucket")