datasets: Fix compatibility with Python 3.7

CHANGES.md

@@ -2,7 +2,7 @@
 
 
 ## Unreleased
-
+- datasets: Fix compatibility with Python 3.7
 
 ## 2024/03/07 v0.0.7
 - datasets: Fix dataset loader

cratedb_toolkit/datasets/model.py

@@ -6,6 +6,11 @@
 
 from cratedb_toolkit.util import DatabaseAdapter
 
+try:
+ from typing import Literal
+except ImportError:
+ from typing_extensions import Literal # type: ignore[assignment]
+
 
 @dataclasses.dataclass
 class Dataset:
@@ -68,7 +73,7 @@ def __post_init__(self):
 
  def create(
  self,
- if_exists: t.Literal["append", "noop", "replace"] = "noop",
+ if_exists: Literal["append", "noop", "replace"] = "noop",
  drop: bool = False,
  ):
  """
@@ -95,7 +100,7 @@ def create(
 
  def load(
  self,
- if_exists: t.Literal["append", "noop", "replace"] = "noop",
+ if_exists: Literal["append", "noop", "replace"] = "noop",
  drop: bool = False,
  ):
  self.create(if_exists=if_exists, drop=drop)

cratedb_toolkit/util/database.py

@@ -13,6 +13,11 @@
 
 from cratedb_toolkit.util.data import str_contains
 
+try:
+ from typing import Literal
+except ImportError:
+ from typing_extensions import Literal # type: ignore[assignment]
+
 
 def run_sql(dburi: str, sql: str, records: bool = False):
  return DatabaseAdapter(dburi=dburi).run_sql(sql=sql, records=records)
@@ -74,7 +79,7 @@ def run_sql_real(self, sql: str, records: bool = False):
  else:
  return results
 
- def count_records(self, tablename_full: str, errors: t.Literal["raise", "ignore"] = "raise"):
+ def count_records(self, tablename_full: str, errors: Literal["raise", "ignore"] = "raise"):
  """
  Return number of records in table.
  """
@@ -107,7 +112,7 @@ def refresh_table(self, tablename_full: str):
  self.run_sql(sql=sql)
  return True
 
- def prune_table(self, tablename_full: str, errors: t.Literal["raise", "ignore"] = "raise"):
+ def prune_table(self, tablename_full: str, errors: Literal["raise", "ignore"] = "raise"):
  """
  Run a `DELETE FROM ...` command.
  """

pyproject.toml

@@ -96,6 +96,7 @@ dependencies = [
  "python-slugify<9",
  "sqlalchemy",
  "sqlparse<0.5",
+ 'typing-extensions<5; python_version <= "3.7"',
 ]
 [project.optional-dependencies]
 all = [