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diff --git a/setup.py b/setup.py
index 62eeabb..b7edb53 100644
--- a/setup.py
+++ b/setup.py
@@ -68,7 +68,7 @@ extras = {
extras["all"] = sorted(sum(extras.values(), []))
-install_requires = ["attrs>=19.2.0"]
+install_requires = ["attrs>=16.0.0"]
# Using an environment marker on enum34 makes the dependency condition
# independent of the build environemnt, which is important for wheels.
# https://www.python.org/dev/peps/pep-0345/#environment-markers
diff --git a/src/hypothesis/internal/conjecture/shrinker.py b/src/hypothesis/internal/conjecture/shrinker.py
index 95c6de1..c0d485c 100644
--- a/src/hypothesis/internal/conjecture/shrinker.py
+++ b/src/hypothesis/internal/conjecture/shrinker.py
@@ -1442,7 +1442,7 @@ def block_program(description):
return name
-@attr.s(slots=True, eq=False)
+@attr.s(slots=True, cmp=False)
class ShrinkPass(object):
run_with_chooser = attr.ib()
index = attr.ib()
diff --git a/src/hypothesis/searchstrategy/attrs.py b/src/hypothesis/searchstrategy/attrs.py
index a3c287a..1e08bc3 100644
--- a/src/hypothesis/searchstrategy/attrs.py
+++ b/src/hypothesis/searchstrategy/attrs.py
@@ -45,12 +45,12 @@ def from_attrs(target, args, kwargs, to_infer):
def from_attrs_attribute(attrib, target):
"""Infer a strategy from the metadata on an attr.Attribute object."""
- # Try inferring from the default argument. Note that this will only help if
+ # Try inferring from the default argument. Note that this will only help
# the user passed `infer` to builds() for this attribute, but in that case
# we use it as the minimal example.
default = st.nothing()
if isinstance(attrib.default, attr.Factory):
- if not attrib.default.takes_self:
+ if not getattr(attrib.default, "takes_self", False): # new in 17.1
default = st.builds(attrib.default.factory)
elif attrib.default is not attr.NOTHING:
default = st.just(attrib.default)
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