tim-one
commented
23 years ago WRT the docs for the Windows flavor of mmap.mmap():
1) Doc needed: The file *must* be opened for update (r+, w+, rb+ or wb+). That's because CreateFileMapping is called with PAGE_READWRITE, and that won't let you increase permissions over the original open mode. Violating this yields baffling "The parameter is wrong" Windows errors from mmap.mmap().
2) Doc needed: Passing a size of 0 makes the maximum size of the mapping the actual current size of the file. Don't know whether that's also true on Unices (ask AMK?); on Windows it's intentional; and it's handy to know so it's worth documenting.
3) Doc bug: The docs read as if omitting the optional tagname is different than supplying a tagname of None. I don't believe that's true; needs mild rewording.
Fred and AMK and c.l.py got a longer version of this msg. I think the example of using mmap with re would be worth including too (but it would be nice to have an example that isn't Windows-specific! someone should try that on Linux too, and fiddle as needed).
freddrake
akuchling
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields: ```python assignee = 'https://github.com/akuchling' closed_at =
created_at =
labels = ['docs']
title = 'Windows mmap docs need cleaning'
updated_at =
user = 'https://github.com/tim-one'
```
bugs.python.org fields:
```python
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assignee = 'akuchling'
closed = True
closed_date = None
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components = ['Documentation']
creation =
creator = 'tim.peters'
dependencies = []
files = []
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issue_num = 228251
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messages = ['2882', '2883', '2884']
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nosy_names = ['tim.peters', 'fdrake', 'akuchling']
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priority = 'high'
resolution = 'fixed'
stage = None
status = 'closed'
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type = None
url = 'https://bugs.python.org/issue228251'
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```