我通过http://pep8online.com运行时，我的AWS备份脚本抛出了缩进错误。
我遍历了代码，并用空格替换了所有标签，将所有空格都替换了标签，等等。但是错误仍然存在。
确切的错误在脚本的第23行，显示为“ IndentationError：unindent与任何外部缩进级别都不匹配”。
但是，如果我将上面的缩进更改为2个空格，则在第23行会收到一个不同的错误“缩进不是4的倍数”，然后在整个脚本中将所有错误标记为正在运行。
我正在使用的代码如下。
import boto3
import collections
import datetime
import time
import sys
today = datetime.date.today()
today_string = today.strftime('%Y/%m/%d')
# Set the number of days before snapshot deletion (10).
deletion_date = today - datetime.timedelta(days=10)
deletion_date_string = deletion_date.strftime('%Y/%m/%d')
ec2 = boto3.client('ec2')
regions = ec2.describe_regions().get('Regions', [])
all_regions = [region['RegionName'] for region in regions]
def lambda_handler(event, context):
snapshot_counter = 0
snap_size_counter = 0
deletion_counter = 0
deleted_size_counter = 0
for region_name in all_regions:
ec2 = boto3.resource('ec2', region_name=region_name)
# We only want to look through instances with the following tag key value pair: auto_snapshot : true
instances = ec2.instances.filter(
Filters=[
{'Name': 'tag:auto_snapshot', 'Values': ['true']}
]
)
volume_ids = []
for i in instances.all():
for tag in i.tags: # Get the name of the instance
if tag['Key'] == 'Name':
name = tag['Value']
vols = i.volumes.all() # Iterate through each instances volumes
for v in vols:
print('{0} is attached to volume {1}, proceeding to snapshot'.format(name, v.id))
volume_ids.extend(v.id)
snapshot = v.create_snapshot(
Description = 'AutoSnapshot of {0}, on volume {1} - Created {2}'.format(name, v.id, today_string),
)
snapshot.create_tags( # Add the following tags to the new snapshot
Tags = [
{
'Key': 'auto_snap',
'Value': 'true'
},
{
'Key': 'volume',
'Value': v.id
},
{
'Key': 'CreatedOn',
'Value': today_string
},
{
'Key': 'Name',
'Value': '{} autosnap'.format(name)
}
]
)
snapshot_counter += 1
snap_size_counter += snapshot.volume_size
# Now iterate through snapshots which were made by autosnap
snapshots = ec2.snapshots.filter(
Filters=[
{'Name': 'tag:auto_snap', 'Values': ['true']
}
]
)
for snap in snapshots:
can_delete = False
for tag in snap.tags: # Use these if statements to get each snapshot's
# created on date, name and auto_snap tag
if tag['Key'] == 'CreatedOn':
created_on_string = tag['Value']
if tag['Key'] == 'auto_snap':
if tag['Value'] == 'true':
can_delete = True
if tag['Key'] == 'Name':
name = tag['Value']
created_on = datetime.datetime.strptime(created_on_string, '%Y/%m/%d').date()
if created_on <= deletion_date and can_delete == True:
deleted_size_counter += snap.volume_size
snap.delete()
deletion_counter += 1
return
答案 0 :(得分：0)
您的代码格式有些错误，我只是在PyCharm中对其进行了格式设置，现在它不报告缩进错误等。请尝试以下操作：
import boto3
import collections
import datetime
import time
import sys
today = datetime.date.today()
today_string = today.strftime('%Y/%m/%d')
# Set the number of days before snapshot deletion (10).
deletion_date = today - datetime.timedelta(days=10)
deletion_date_string = deletion_date.strftime('%Y/%m/%d')
ec2 = boto3.client('ec2')
regions = ec2.describe_regions().get('Regions', [])
all_regions = [region['RegionName'] for region in regions]
def lambda_handler(event, context):
snapshot_counter = 0
snap_size_counter = 0
deletion_counter = 0
deleted_size_counter = 0
for region_name in all_regions:
ec2 = boto3.resource('ec2', region_name=region_name)
# We only want to look through instances with the following tag key value pair: auto_snapshot : true
instances = ec2.instances.filter(
Filters=[
{'Name': 'tag:auto_snapshot', 'Values': ['true']}
]
)
volume_ids = []
for i in instances.all():
for tag in i.tags: # Get the name of the instance
if tag['Key'] == 'Name':
name = tag['Value']
vols = i.volumes.all() # Iterate through each instances volumes
for v in vols:
print('{0} is attached to volume {1}, proceeding to snapshot'.format(name, v.id))
volume_ids.extend(v.id)
snapshot = v.create_snapshot(
Description = 'AutoSnapshot of {0}, on volume {1} - Created {2}'.format(name, v.id, today_string),
)
snapshot.create_tags( # Add the following tags to the new snapshot
Tags = [
{
'Key': 'auto_snap',
'Value': 'true'
},
{
'Key': 'volume',
'Value': v.id
},
{
'Key': 'CreatedOn',
'Value': today_string
},
{
'Key': 'Name',
'Value': '{} autosnap'.format(name)
}
]
)
snapshot_counter += 1
snap_size_counter += snapshot.volume_size
# Now iterate through snapshots which were made by autosnap
snapshots = ec2.snapshots.filter(
Filters=[
{'Name': 'tag:auto_snap', 'Values': ['true']
}
]
)
for snap in snapshots:
can_delete = False
for tag in snap.tags: # Use these if statements to get each snapshot's
# created on date, name and auto_snap tag
if tag['Key'] == 'CreatedOn':
created_on_string = tag['Value']
if tag['Key'] == 'auto_snap':
if tag['Value'] == 'true':
can_delete = True
if tag['Key'] == 'Name':
name = tag['Value']
created_on = datetime.datetime.strptime(created_on_string, '%Y/%m/%d').date()
if created_on <= deletion_date and can_delete == True:
deleted_size_counter += snap.volume_size
snap.delete()
deletion_counter += 1
return
在线上也有一个linter，如果您仅复制并粘贴代码https://pythonbuddy.com/，它会告诉您是否存在类似错误等。终端中也可以使用诸如pylint，flake8等的短绒。