"""
Helper functions for handling DB accesses.
"""
-from typing import IO, Optional, Union
+from typing import IO, Optional, Union, Any, Iterable
import subprocess
import logging
import gzip
import io
from pathlib import Path
-from nominatim.db.connection import get_pg_env
+from nominatim.db.connection import get_pg_env, Cursor
from nominatim.errors import UsageError
LOG = logging.getLogger()
-def _pipe_to_proc(proc: subprocess.Popen[bytes],
+def _pipe_to_proc(proc: 'subprocess.Popen[bytes]',
fdesc: Union[IO[bytes], gzip.GzipFile]) -> int:
assert proc.stdin is not None
chunk = fdesc.read(2048)
""" Data collector for the copy_from command.
"""
- def __init__(self):
+ def __init__(self) -> None:
self.buffer = io.StringIO()
- def __enter__(self):
+ def __enter__(self) -> 'CopyBuffer':
return self
- def __exit__(self, exc_type, exc_value, traceback):
+ def __exit__(self, exc_type: Any, exc_value: Any, traceback: Any) -> None:
if self.buffer is not None:
self.buffer.close()
- def add(self, *data):
+ def add(self, *data: Any) -> None:
""" Add another row of data to the copy buffer.
"""
first = True
self.buffer.write('\n')
- def copy_out(self, cur, table, columns=None):
+ def copy_out(self, cur: Cursor, table: str, columns: Optional[Iterable[str]] = None) -> None:
""" Copy all collected data into the given table.
"""
if self.buffer.tell() > 0: