Shantanu b4da2b694b csv: re-export Dialect from _csv (#3613) ...

Resolves #3611

Tested with mypy on:
```
f = open("asdf.csv", "w")

csv.writer(f)
csv.writer(f, dialect=csv.excel)
csv.writer(f, dialect=csv.excel())

csv.DictReader(f)
csv.DictReader(f, dialect=csv.excel)
csv.DictReader(f, dialect=csv.excel())

class CustomDialect(csv.Dialect):
    delimiter = "%"

csv.writer(f, dialect=CustomDialect)
csv.writer(f, dialect=CustomDialect())
```

2020-01-22 17:11:52 -08:00

..

2

Make os.statvfs_result inherit from typing.NamedTuple. (#3603)

2020-01-10 22:42:29 +01:00

2and3

csv: re-export Dialect from _csv (#3613)

2020-01-22 17:11:52 -08:00

3

asyncio: fix SendfileNotAvailableError availability (#3631)

2020-01-22 17:27:58 +01:00

3.6

Make some arguments in secrets module optional (#1929)

2018-02-27 10:52:21 -08:00

3.7

Remove a bunch of unused imports (#3323)

2019-10-08 07:59:32 -07:00