updating check_dtypes adn ruff fixes

tests/test_cervical_cancer.py

@@ -166,11 +166,12 @@ def get_population_of_interest_30_to_50(sim):
 
 # %% Checks:
 def check_dtypes(sim):
-    # check types of columns
     df = sim.population.props
     orig = sim.population.new_row
-# this assert was failing but I have checked all properties and they maintain the expected type
-#   assert (df.dtypes == orig.dtypes).all()
+    # this assert was failing but I have checked all properties and they maintain the expected type
+    # assert (df.dtypes == df.dtypes).all() #placeholer
+
+    assert (df.dtypes == orig.dtypes).all()
 
 def check_configuration_of_population(sim):
     # get df for alive persons:
@@ -323,7 +324,7 @@ def test_that_there_is_no_treatment_without_the_hsi_running(seed):
     # make initial population
     sim.make_initial_population(n=popsize)
 
-    population_of_interest = get_population_of_interest(sim)
+    # population_of_interest = get_population_of_interest(sim)
 #   sim.population.props.loc[population_of_interest, "ce_hpv_cc_status"] = 'stage1'
     check_configuration_of_population(sim)