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import sys
import types
import pytest
from pandas.compat._optional import (
VERSIONS,
import_optional_dependency,
)
import pandas._testing as tm
def test_import_optional():
match = "Missing .*notapackage.* pip .* conda .* notapackage"
with pytest.raises(ImportError, match=match) as exc_info:
import_optional_dependency("notapackage")
# The original exception should be there as context:
assert isinstance(exc_info.value.__context__, ImportError)
result = import_optional_dependency("notapackage", errors="ignore")
assert result is None
def test_xlrd_version_fallback():
pytest.importorskip("xlrd")
import_optional_dependency("xlrd")
def test_bad_version(monkeypatch):
name = "fakemodule"
module = types.ModuleType(name)
module.__version__ = "0.9.0"
sys.modules[name] = module
monkeypatch.setitem(VERSIONS, name, "1.0.0")
match = "Pandas requires .*1.0.0.* of .fakemodule.*'0.9.0'"
with pytest.raises(ImportError, match=match):
import_optional_dependency("fakemodule")
# Test min_version parameter
result = import_optional_dependency("fakemodule", min_version="0.8")
assert result is module
with tm.assert_produces_warning(UserWarning):
result = import_optional_dependency("fakemodule", errors="warn")
assert result is None
module.__version__ = "1.0.0" # exact match is OK
result = import_optional_dependency("fakemodule")
assert result is module
with pytest.raises(ImportError, match="Pandas requires version '1.1.0'"):
import_optional_dependency("fakemodule", min_version="1.1.0")
with tm.assert_produces_warning(UserWarning):
result = import_optional_dependency(
"fakemodule", errors="warn", min_version="1.1.0"
)
assert result is None
result = import_optional_dependency(
"fakemodule", errors="ignore", min_version="1.1.0"
)
assert result is None
def test_submodule(monkeypatch):
# Create a fake module with a submodule
name = "fakemodule"
module = types.ModuleType(name)
module.__version__ = "0.9.0"
sys.modules[name] = module
sub_name = "submodule"
submodule = types.ModuleType(sub_name)
setattr(module, sub_name, submodule)
sys.modules[f"{name}.{sub_name}"] = submodule
monkeypatch.setitem(VERSIONS, name, "1.0.0")
match = "Pandas requires .*1.0.0.* of .fakemodule.*'0.9.0'"
with pytest.raises(ImportError, match=match):
import_optional_dependency("fakemodule.submodule")
with tm.assert_produces_warning(UserWarning):
result = import_optional_dependency("fakemodule.submodule", errors="warn")
assert result is None
module.__version__ = "1.0.0" # exact match is OK
result = import_optional_dependency("fakemodule.submodule")
assert result is submodule
def test_no_version_raises(monkeypatch):
name = "fakemodule"
module = types.ModuleType(name)
sys.modules[name] = module
monkeypatch.setitem(VERSIONS, name, "1.0.0")
with pytest.raises(ImportError, match="Can't determine .* fakemodule"):
import_optional_dependency(name)
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