Created
February 5, 2022 00:57
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magic dir
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| from metaflow import FlowSpec, step | |
| from functools import wraps | |
| from functools import wraps | |
| dir = 'mydir' | |
| def magicdir(f): | |
| artifact = 'magicdir' | |
| @wraps(f) | |
| def func(self): | |
| from io import BytesIO | |
| from tarfile import TarFile | |
| existing = getattr(self, artifact, None) | |
| if existing: | |
| buf = BytesIO(existing) | |
| with TarFile(mode='r', fileobj=buf) as tar: | |
| tar.extractall() | |
| f(self) | |
| buf = BytesIO() | |
| with TarFile(mode='w', fileobj=buf) as tar: | |
| tar.add(dir) | |
| setattr(self, artifact, buf.getvalue()) | |
| return func | |
| class MagicDirFlow(FlowSpec): | |
| @magicdir | |
| @step | |
| def start(self): | |
| with open('mydir/output1', 'w') as f: | |
| f.write('hello world') | |
| with open('mydir/output2', 'w') as f: | |
| f.write('hello world again') | |
| self.next(self.end) | |
| @magicdir | |
| @step | |
| def end(self): | |
| print('first', open('mydir/output1').read()) | |
| print('second', open('mydir/output1').read()) | |
| if __name__ == "__main__": | |
| MagicDirFlow() |
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