megfile
provides a silky operation experience with different backends (currently including local file system and s3), which enable you to focus more on the logic of your own project instead of the question of "Which backend is used for this file?"
megfile
provides:
- Almost unified file system operation experience. Target path can be easily moved from local file system to s3.
- Complete boundary case handling. Even the most difficult (or even you can't even think of) boundary conditions,
megfile
can help you easily handle it. - Perfect type hints and built-in documentation. You can enjoy the IDE's auto-completion and static checking.
- Semantic version and upgrade guide, which allows you enjoy the latest features easily.
megfile
's advantages are:
smart_open
can open resources that use various protocols, including fs, s3, http(s) and stdio. Especially, reader / writer of s3 inmegfile
is implemented with multi-thread, which is faster than known competitors.smart_glob
is available on s3. And it supports zsh extended pattern syntax of[]
, e.g.s3://bucket/video.{mp4,avi}
.- All-inclusive functions like
smart_exists
/smart_stat
/smart_sync
. If you don't find the functions you want, submit an issue. - Compatible with
pathlib.Path
interface, referring toS3Path
andSmartPath
.
Here's an example of writing a file to s3 / sftp / fs, syncing to local, reading and finally deleting it.
from megfile import smart_open, smart_exists, smart_sync, smart_remove, smart_glob
# open a file in s3 bucket
with smart_open('s3://playground/megfile-test', 'w') as fp:
fp.write('megfile is not silver bullet')
# test if file in s3 bucket exist
smart_exists('s3://playground/megfile-test')
# or in local file system
smart_exists('/tmp/playground/megfile-test')
# copy files or directories
smart_sync('s3://playground/megfile-test', '/tmp/playground/megfile-test')
# remove files or directories
smart_remove('s3://playground/megfile-test')
# glob files or directories in s3 bucket
smart_glob('s3://playground/megfile-?.{mp4,avi}')
# smart_open also support protocols like http / https
smart_open('https://www.google.com')
# smart_open also support protocols like sftp
smart_open('sftp://username:password@sftp.server.com:22/path/to/file')
from megfile.smart_path import SmartPath
path = SmartPath('s3://playground/megfile-test')
if path.exists():
with path.open() as f:
result = f.read(7)
assert result == b'megfile'
$ megfile --help # see what you can do
$ megfile ls s3://playground/
$ megfile ls -l -h s3://playground/
$ megfile cat s3://playground/megfile-test
$ megfile cp s3://playground/megfile-test /tmp/playground/megfile-test
pip3 install megfile
You can specify megfile version as well
pip3 install "megfile~=0.0"
megfile can be installed from source
git clone git@github.com:megvii-research/megfile.git
cd megfile
pip3 install -U .
git clone git@github.com:megvii-research/megfile.git
cd megfile
pip3 install -r requirements.txt -r requirements-dev.txt
Before using megfile
to access files on s3, you need to set up authentication credentials for your s3 account using the AWS CLI or editing the file ~/.aws/config
directly, see also: boto3 configuration & boto3 credentials. You can set your endpoint url with environments OSS_ENDPOINT
.
$ aws configure
AWS Access Key ID [None]: accesskey
AWS Secret Access Key [None]: secretkey
Default region name [None]:
Default output format [None]:
# for aliyun oss only
$ aws configure set s3.addressing_style virtual
$ aws configure set s3.endpoint_url http://oss-cn-hangzhou.aliyuncs.com
$ cat ~/.aws/config
[default]
aws_secret_access_key = accesskey
aws_access_key_id = secretkey
s3 =
addressing_style = virtual
endpoint_url = http://oss-cn-hangzhou.aliyuncs.com
You also can operate s3 files with different endpoint urls, access keys and secret keys. You can set config for different profiles by environment(PROFILE_NAME__AWS_ACCESS_KEY_ID
, PROFILE_NAME__AWS_SECRET_ACCESS_KEY
, PROFILE_NAME__OSS_ENDPOINT
) or ~/.aws/config
. Then you can operate files with path s3+profile_name://bucket/key
.
For example:
# set config with environment
$ export PROFILE1__AWS_ACCESS_KEY_ID=profile1-accesskey
$ export PROFILE1__AWS_SECRET_ACCESS_KEY=profile1-secretkey
$ export PROFILE1__OSS_ENDPOINT=https://profile1.s3.custom.com
$ export PROFILE2__AWS_ACCESS_KEY_ID=profile2-accesskey
$ export PROFILE2__AWS_SECRET_ACCESS_KEY=profile2-secretkey
$ export PROFILE2__OSS_ENDPOINT=https://profile2.s3.custom.com
# set config with file
$ cat ~/.aws/config
[profile1]
aws_secret_access_key = profile1-accesskey
aws_access_key_id = profile1-secretkey
s3 =
endpoint_url = https://profile1.s3.custom.com
[profile2]
aws_secret_access_key = profile2-accesskey
aws_access_key_id = profile2-secretkey
s3 =
endpoint_url = https://profile2.s3.custom.com
# python
megfile.smart_copy('s3+profile1://bucket/key', 's3+profile2://bucket/key')
sftp path format is sftp://[username[:password]@]hostname[:port]/file_path
, and sftp support some environments:
# If you are not set username or password in path, you can set them in environments
$ export SFTP_USERNAME=user
$ export SFTP_PASSWORD=user_password
# You can also set private key for sftp connection
$ export SFTP_PRIVATE_KEY_PATH=/home/user/custom_private_key_path # default not use private key
$ export SFTP_PRIVATE_KEY_TYPE=RSA # default is RSA
$ export SFTP_PRIVATE_KEY_PASSWORD=private_key_password
-
We welcome everyone to contribute code to the
megfile
project, but the contributed code needs to meet the following conditions as much as possible:You can submit code even if the code doesn't meet conditions. The project members will evaluate and assist you in making code changes
-
Code format: Your code needs to pass code format check.
megfile
usesyapf
as lint tool and the version is locked at 0.27.0. The version lock may be removed in the future -
Static check: Your code needs complete type hint.
megfile
usespytype
as static check tool. Ifpytype
failed in static check, use# pytype: disable=XXX
to disable the error and please tell us why you disable it.Note : Because
pytype
doesn't support variable type annation, the variable type hint format introduced by py36 cannot be used.i.e.
variable: int
is invalid, replace it withvariable # type: int
-
Test: Your code needs complete unit test coverage.
megfile
usespyfakefs
andmoto
as local file system and s3 virtual environment in unit tests. The newly added code should have a complete unit test to ensure the correctness
-
-
You can help to improve
megfile
in many ways:- Write code.
- Improve documentation.
- Report or investigate bugs and issues.
- If you find any problem or have any improving suggestion, submit a new issuse as well. We will reply as soon as possible and evaluate whether to adopt.
- Review pull requests.
- Star
megfile
repo. - Recommend
megfile
to your friends. - Any other form of contribution is welcomed.