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"""
Check that pandas/core imports pandas.array as pd_array.
This makes it easier to grep for usage of pandas array.
This is meant to be run as a pre-commit hook - to run it manually, you can do:
pre-commit run use-pd_array-in-core --all-files
"""
from __future__ import annotations
import argparse
import ast
import sys
from typing import Sequence
ERROR_MESSAGE = (
"{path}:{lineno}:{col_offset}: "
"Don't use pd.array in core, import array as pd_array instead\n"
)
class Visitor(ast.NodeVisitor):
def __init__(self, path: str) -> None:
self.path = path
def visit_ImportFrom(self, node: ast.ImportFrom) -> None:
# If array has been imported from somewhere in pandas,
# check it's aliased as pd_array.
if (
node.module is not None
and node.module.startswith("pandas")
and any(i.name == "array" and i.asname != "pd_array" for i in node.names)
):
msg = ERROR_MESSAGE.format(
path=self.path, lineno=node.lineno, col_offset=node.col_offset
)
sys.stdout.write(msg)
sys.exit(1)
super().generic_visit(node)
def visit_Attribute(self, node: ast.Attribute) -> None:
if (
isinstance(node.value, ast.Name)
and node.value.id == "pd"
and node.attr == "array"
):
msg = ERROR_MESSAGE.format(
path=self.path, lineno=node.lineno, col_offset=node.col_offset
)
sys.stdout.write(msg)
sys.exit(1)
super().generic_visit(node)
def use_pd_array(content: str, path: str) -> None:
tree = ast.parse(content)
visitor = Visitor(path)
visitor.visit(tree)
def main(argv: Sequence[str] | None = None) -> None:
parser = argparse.ArgumentParser()
parser.add_argument("paths", nargs="*")
args = parser.parse_args(argv)
for path in args.paths:
with open(path, encoding="utf-8") as fd:
content = fd.read()
use_pd_array(content, path)
if __name__ == "__main__":
main()
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