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made Session a Context Manager for use in 'with' statement, fixes #1244 #1245

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Sep 10, 2021
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made Session a Context Manager for use in 'with' statement, fixes #1244 #1245

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11 changes: 11 additions & 0 deletions pyclient/pydeephaven/session.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,9 @@ class Session:
methods for asking the server to create tables, import Arrow data into tables, merge tables, run Python scripts, and
execute queries.

Session objects can be used in Python with statement so that whatever happens in the with statement block, they
are guaranteed to be closed upon exit.

Attributes:
tables (list[str]): names of the tables available in the server after running scripts
is_alive (bool): check if the session is still alive (may refresh the session)
Expand Down Expand Up @@ -71,6 +74,14 @@ def __init__(self, host: str = None, port: int = None, never_timeout: bool = Tru

self._connect()

def __enter__(self):
if not self.is_connected:
self._connect()
return self

def __exit__(self, exc_type, exc_val, exc_tb):
self.close()

@property
def tables(self):
return [t for t in self._tables if self._tables[t][0] == 'Table']
Expand Down