subprocess stdout read1
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Assessment
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Newbie friendliness
- 72/100
Research direction
Locate the subprocess.Popen stdout stub and inspect how its stream type is declared. Reproduce the issue with the provided Python snippet, then verify that mypy accepts read1() on process.stdout without losing the existing stdout typing.
Written by the indexing model from the issue text.
Description
import subprocess
process = subprocess.Popen("echo hello", shell=True, stdout=subprocess.PIPE)
assert process.stdout is not None
print(process.stdout.read1())
mypy error:
asd.py:4: error: "IO[bytes]" has no attribute "read1"; maybe "read"?
Found 1 error in 1 file (checked 1 source file)
But at runtime there is read1() method. It is useful because unlike read(), it will return the output as soon as it is available, instead of reading more until it gets n bytes or end of file.
- Dominant language
- Python
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- Merged PRs (30d)
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