support for - as parameter
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enhancement
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- Python
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描述
as stated here https://docs.python.org/3/library/fileinput.html sometimes
```
echo 'one line' | python3 test.py -
Fire trace:
1. Initial component
2. ('The function received no value for the required argument:', 'file_name')
```
should use std in instead file for input or output
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