[IMPALA-11976] Fix use of deprecated functions / packages in Python3 (long, maxint, file, etc)

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 4.3.0
• Fix Version/s: Impala 4.3.0
• Component/s: Infrastructure
• Epic Color: ghx-label-2
• Assignee: Joe McDonnell
• Reporter: Joe McDonnell
• Created: 06/Mar/23 18:58
• Updated: 09/Mar/23 17:37
• Resolved: 09/Mar/23 17:37

Description

Python 3 removed several deprecated functions / types.

 

# sys.maxint is removed, replace with sys.maxsize
sys.maxint -> sys.maxsize

# file() is removed, use open()
file() -> open()

# Long is gone, int is now equivalent to long, can use int from future
from builtins import int
long() -> int()

# e.message is gone, replace with str(e) 
e.message -> str(e)

There are a grab bag of others like strings.letters becoming string.ascii_letters and codecs moving to a different package.

This is also a good time to get the new behavior for round().

See these descriptions:

https://python-future.org/compatible_idioms.html#file

https://python-future.org/compatible_idioms.html#long-integers

This corresponds to these pylint checks:

file-builtin
long-builtin
invalid-str-codec
round-builtin
deprecated-string-function
sys-max-int
exception-message-attribute