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Commita2bebb9

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feat: adds new input validation function similar to isinstance. (#2107)
* feat: adds new function similar to isinstance.* 🦉 Updates from OwlBot post-processorSeehttps://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md---------Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
1 parentb35d741 commita2bebb9

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2 files changed

+63
-1
lines changed

2 files changed

+63
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lines changed

‎google/cloud/bigquery/_helpers.py‎

Lines changed: 31 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -22,7 +22,7 @@
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importre
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importos
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importwarnings
25-
fromtypingimportOptional,Union
25+
fromtypingimportOptional,Union,Any,Tuple,Type
2626

2727
fromdateutilimportrelativedelta
2828
fromgoogle.cloud._helpersimportUTC# type: ignore
@@ -1004,3 +1004,33 @@ def _verify_job_config_type(job_config, expected_type, param_name="job_config"):
10041004
job_config=job_config,
10051005
)
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)
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1008+
1009+
def_isinstance_or_raise(
1010+
value:Any,
1011+
dtype:Union[Type,Tuple[Type, ...]],
1012+
none_allowed:Optional[bool]=False,
1013+
)->Any:
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"""Determine whether a value type matches a given datatype or None.
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Args:
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value (Any): Value to be checked.
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dtype (type): Expected data type or tuple of data types.
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none_allowed Optional(bool): whether value is allowed to be None. Default
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is False.
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Returns:
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Any: Returns the input value if the type check is successful.
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Raises:
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TypeError: If the input value's type does not match the expected data type(s).
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"""
1025+
ifnone_allowedandvalueisNone:
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returnvalue
1027+
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ifisinstance(value,dtype):
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returnvalue
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or_none=""
1032+
ifnone_allowed:
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or_none=" (or None)"
1034+
1035+
msg=f"Pass{value} as a '{dtype}'{or_none}. Got{type(value)}."
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raiseTypeError(msg)

‎tests/unit/test__helpers.py‎

Lines changed: 32 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@
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fromunittestimportmock
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importgoogle.api_core
27+
fromgoogle.cloud.bigquery._helpersimport_isinstance_or_raise
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2829

2930
@pytest.mark.skipif(
@@ -1661,3 +1662,34 @@ def test_w_env_var(self):
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host=self._call_fut()
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self.assertEqual(host,HOST)
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1666+
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classTest__isinstance_or_raise:
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@pytest.mark.parametrize(
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"value,dtype,none_allowed,expected",
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[
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(None,str,True,None),
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("hello world.uri",str,True,"hello world.uri"),
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("hello world.uri",str,False,"hello world.uri"),
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(None, (str,float),True,None),
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("hello world.uri", (str,float),True,"hello world.uri"),
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("hello world.uri", (str,float),False,"hello world.uri"),
1677+
],
1678+
)
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deftest__valid_isinstance_or_raise(self,value,dtype,none_allowed,expected):
1680+
result=_isinstance_or_raise(value,dtype,none_allowed=none_allowed)
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assertresult==expected
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@pytest.mark.parametrize(
1684+
"value,dtype,none_allowed,expected",
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[
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(None,str,False,pytest.raises(TypeError)),
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({"key":"value"},str,True,pytest.raises(TypeError)),
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({"key":"value"},str,False,pytest.raises(TypeError)),
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({"key":"value"}, (str,float),True,pytest.raises(TypeError)),
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({"key":"value"}, (str,float),False,pytest.raises(TypeError)),
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],
1692+
)
1693+
deftest__invalid_isinstance_or_raise(self,value,dtype,none_allowed,expected):
1694+
withexpected:
1695+
_isinstance_or_raise(value,dtype,none_allowed=none_allowed)

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