diff --git a/_delphi_utils_python/.pylintrc b/_delphi_utils_python/.pylintrc
index 2a9334425..994d47417 100644
--- a/_delphi_utils_python/.pylintrc
+++ b/_delphi_utils_python/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/_template_python/.pylintrc b/_template_python/.pylintrc
new file mode 100644
index 000000000..994d47417
--- /dev/null
+++ b/_template_python/.pylintrc
@@ -0,0 +1,21 @@
+
+[MESSAGES CONTROL]
+
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
+
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
+
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/cdc_covidnet/.pylintrc b/cdc_covidnet/.pylintrc
new file mode 100644
index 000000000..994d47417
--- /dev/null
+++ b/cdc_covidnet/.pylintrc
@@ -0,0 +1,21 @@
+
+[MESSAGES CONTROL]
+
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
+
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
+
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/changehc/.pylintrc b/changehc/.pylintrc
new file mode 100644
index 000000000..994d47417
--- /dev/null
+++ b/changehc/.pylintrc
@@ -0,0 +1,21 @@
+
+[MESSAGES CONTROL]
+
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
+
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
+
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/claims_hosp/.pylintrc b/claims_hosp/.pylintrc
new file mode 100644
index 000000000..994d47417
--- /dev/null
+++ b/claims_hosp/.pylintrc
@@ -0,0 +1,21 @@
+
+[MESSAGES CONTROL]
+
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
+
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
+
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/combo_cases_and_deaths/.pylintrc b/combo_cases_and_deaths/.pylintrc
new file mode 100644
index 000000000..994d47417
--- /dev/null
+++ b/combo_cases_and_deaths/.pylintrc
@@ -0,0 +1,21 @@
+
+[MESSAGES CONTROL]
+
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
+
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
+
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/emr_hosp/.pylintrc b/emr_hosp/.pylintrc
new file mode 100644
index 000000000..994d47417
--- /dev/null
+++ b/emr_hosp/.pylintrc
@@ -0,0 +1,21 @@
+
+[MESSAGES CONTROL]
+
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
+
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
+
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/google_health/.pylintrc b/google_health/.pylintrc
index 2a9334425..994d47417 100644
--- a/google_health/.pylintrc
+++ b/google_health/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/google_health/delphi_google_health/pull_api.py b/google_health/delphi_google_health/pull_api.py
index faa3734d5..868e8975d 100644
--- a/google_health/delphi_google_health/pull_api.py
+++ b/google_health/delphi_google_health/pull_api.py
@@ -77,7 +77,7 @@ def query(self, start_date: str, end_date: str, geo_id, dma=False) -> dict:
             start_date,
             end_date,
         )
-        data = self.service.getTimelinesForHealth(**params).execute()
+        data = self.service.getTimelinesForHealth(**params).execute() #pylint: disable=no-member
 
         return data
 
diff --git a/google_health/delphi_google_health/smooth.py b/google_health/delphi_google_health/smooth.py
index e34484ecf..d8195ab34 100644
--- a/google_health/delphi_google_health/smooth.py
+++ b/google_health/delphi_google_health/smooth.py
@@ -60,11 +60,12 @@ def _left_gauss_linear(s: np.ndarray, h=10, impute=False, minval=None) -> np.nda
 
     n = len(s)
     t = np.zeros_like(s, dtype=np.float64)
-    X = np.vstack([np.ones(n), np.arange(n)]).T
+    X = np.vstack([np.ones(n), np.arange(n)]).T #pylint: disable=invalid-name
     for idx in range(n):
         wts = np.exp(-((np.arange(idx + 1) - idx) ** 2) / (h ** 2))
-        XwX = np.dot(X[: (idx + 1), :].T * wts, X[: (idx + 1), :])
-        Xwy = np.dot(X[: (idx + 1), :].T * wts, s[: (idx + 1)].reshape(-1, 1))
+        XwX = np.dot(X[: (idx + 1), :].T * wts, X[: (idx + 1), :]) #pylint: disable=invalid-name
+        Xwy = np.dot(X[: (idx + 1), :].T * wts, #pylint: disable=invalid-name
+                     s[: (idx + 1)].reshape(-1, 1))
         try:
             beta = np.linalg.solve(XwX, Xwy)
             t[idx] = np.dot(X[: (idx + 1), :], beta)[-1]
diff --git a/jhu/.pylintrc b/jhu/.pylintrc
index 2a9334425..994d47417 100644
--- a/jhu/.pylintrc
+++ b/jhu/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/jhu/delphi_jhu/geo.py b/jhu/delphi_jhu/geo.py
index ea79babb1..1e76c491b 100644
--- a/jhu/delphi_jhu/geo.py
+++ b/jhu/delphi_jhu/geo.py
@@ -1,7 +1,9 @@
 # -*- coding: utf-8 -*-
+"""Functions for translating between geocodes."""
 import pandas as pd
 from delphi_utils import GeoMapper
 
+VALID_GEO_RES = ("county", "state", "msa", "hrr")
 INCIDENCE_BASE = 100000
 
 def geo_map(df: pd.DataFrame, geo_res: str):
@@ -27,7 +29,6 @@ def geo_map(df: pd.DataFrame, geo_res: str):
         Columns: geo_id, timestamp, ...
     """
     df = df.copy()
-    VALID_GEO_RES = ("county", "state", "msa", "hrr")
     if geo_res not in VALID_GEO_RES:
         raise ValueError(f"geo_res must be one of {VALID_GEO_RES}")
 
diff --git a/jhu/delphi_jhu/pull.py b/jhu/delphi_jhu/pull.py
index 3b5ddbe6f..95b74f1da 100644
--- a/jhu/delphi_jhu/pull.py
+++ b/jhu/delphi_jhu/pull.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""Functions to pull data from JHU website."""
 
 import pandas as pd
 import numpy as np
diff --git a/jhu/delphi_jhu/run.py b/jhu/delphi_jhu/run.py
index ee9d1c85b..8f8067da3 100644
--- a/jhu/delphi_jhu/run.py
+++ b/jhu/delphi_jhu/run.py
@@ -66,7 +66,7 @@
 
 
 def run_module():
-
+    """Run the JHU indicator module."""
     params = read_params()
     export_start_date = params["export_start_date"]
     export_dir = params["export_dir"]
diff --git a/jhu/delphi_jhu/smooth.py b/jhu/delphi_jhu/smooth.py
index a6c944fc2..5c9e18a3f 100644
--- a/jhu/delphi_jhu/smooth.py
+++ b/jhu/delphi_jhu/smooth.py
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+'''Functions to smooth signals.'''
+
 import numpy as np
 
 def identity(x):
diff --git a/nchs_mortality/.pylintrc b/nchs_mortality/.pylintrc
index 2a9334425..994d47417 100644
--- a/nchs_mortality/.pylintrc
+++ b/nchs_mortality/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/quidel/.pylintrc b/quidel/.pylintrc
new file mode 100644
index 000000000..994d47417
--- /dev/null
+++ b/quidel/.pylintrc
@@ -0,0 +1,21 @@
+
+[MESSAGES CONTROL]
+
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
+
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
+
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/quidel_covidtest/.pylintrc b/quidel_covidtest/.pylintrc
index 2a9334425..994d47417 100644
--- a/quidel_covidtest/.pylintrc
+++ b/quidel_covidtest/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/quidel_covidtest/delphi_quidel_covidtest/generate_sensor.py b/quidel_covidtest/delphi_quidel_covidtest/generate_sensor.py
index caa8deece..eb8a7cff7 100644
--- a/quidel_covidtest/delphi_quidel_covidtest/generate_sensor.py
+++ b/quidel_covidtest/delphi_quidel_covidtest/generate_sensor.py
@@ -93,7 +93,7 @@ def generate_sensor_for_other_geores(state_groups, data, res_key, smooth,
             res_group = res_group.merge(parent_group, how="left",
                                         on="timestamp", suffixes=('', '_parent'))
             res_group = res_group.drop(columns=[res_key, "state_id", "state_id" + '_parent'])
-        except:
+        except KeyError:
             has_parent = False
             res_group = res_group.drop(columns=[res_key, "state_id"])
         res_group.set_index("timestamp", inplace=True)
diff --git a/quidel_covidtest/delphi_quidel_covidtest/pull.py b/quidel_covidtest/delphi_quidel_covidtest/pull.py
index c19ddabb5..d98b7caa1 100644
--- a/quidel_covidtest/delphi_quidel_covidtest/pull.py
+++ b/quidel_covidtest/delphi_quidel_covidtest/pull.py
@@ -193,9 +193,9 @@ def pull_quidel_covidtest(params):
     Parameters:
         params: dict
             including all the information read from params.json
-        END_FROM_TODAY_MINUS: int
+        end_from_today_minus: int
             report data until - X days
-        EXPORT_DAY_RANGE: int
+        export_day_range: int
             number of dates to report
 
     Returns:
@@ -238,11 +238,11 @@ def pull_quidel_covidtest(params):
     return df, _end_date
 
 def check_export_end_date(input_export_end_date, _end_date,
-                          END_FROM_TODAY_MINUS):
+                          end_from_today_minus):
     """
     Update the export_end_date according to the data received
     By default, set the export end date to be the last pulling date - 5 days
-    (END_FROM_TODAY_MINUS = 5).
+    (end_from_today_minus = 5).
     Otherwise, use the required date if it is earlier than the default one.
 
     Parameter:
@@ -250,14 +250,14 @@ def check_export_end_date(input_export_end_date, _end_date,
             read from params
         _end_date: datetime.datetime
             updated according the data received
-        END_FROM_TODAY_MINUS: int
+        end_from_today_minus: int
             report data until - X days
 
     Returns:
         datetime.datetime
             export data from which date
     """
-    export_end_date = _end_date - timedelta(days=END_FROM_TODAY_MINUS)
+    export_end_date = _end_date - timedelta(days=end_from_today_minus)
     if input_export_end_date != "":
         input_export_end_date = datetime.strptime(input_export_end_date, '%Y-%m-%d')
         if input_export_end_date < export_end_date:
@@ -265,17 +265,17 @@ def check_export_end_date(input_export_end_date, _end_date,
     return export_end_date
 
 def check_export_start_date(export_start_date, export_end_date,
-                            EXPORT_DAY_RANGE):
+                            export_day_range):
     """
     Update the export_start_date according to the export_end_date so that it
-    could be export_end_date - EXPORT_DAY_RANGE
+    could be export_end_date - export_day_range
 
     Parameters:
         export_start_date: str
             Read from params
         export_end_date: datetime.datetime
             Calculated according to the data received
-        EXPORT_DAY_RANGE: int
+        export_day_range: int
             Number of days to report
 
     Returns:
@@ -287,8 +287,8 @@ def check_export_start_date(export_start_date, export_end_date,
     else:
         export_start_date = datetime.strptime(export_start_date, '%Y-%m-%d')
      # Only export data from -45 days to -5 days
-    if (export_end_date - export_start_date).days > EXPORT_DAY_RANGE:
-        export_start_date = export_end_date - timedelta(days=EXPORT_DAY_RANGE)
+    if (export_end_date - export_start_date).days > export_day_range:
+        export_start_date = export_end_date - timedelta(days=export_day_range)
 
     if export_start_date < datetime(2020, 5, 26):
         return datetime(2020, 5, 26)
diff --git a/quidel_covidtest/delphi_quidel_covidtest/run.py b/quidel_covidtest/delphi_quidel_covidtest/run.py
index 0c596bd08..2687322b7 100644
--- a/quidel_covidtest/delphi_quidel_covidtest/run.py
+++ b/quidel_covidtest/delphi_quidel_covidtest/run.py
@@ -25,6 +25,7 @@
 
 
 def run_module():
+    """Run the quidel_covidtest indicator."""
     params = read_params()
     cache_dir = params["cache_dir"]
     export_dir = params["export_dir"]
diff --git a/quidel_covidtest/tests/cache/.gitignore b/quidel_covidtest/tests/cache/.gitignore
new file mode 100644
index 000000000..afed0735d
--- /dev/null
+++ b/quidel_covidtest/tests/cache/.gitignore
@@ -0,0 +1 @@
+*.csv
diff --git a/safegraph/.pylintrc b/safegraph/.pylintrc
index 2a9334425..994d47417 100644
--- a/safegraph/.pylintrc
+++ b/safegraph/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/safegraph_patterns/.pylintrc b/safegraph_patterns/.pylintrc
index 2a9334425..994d47417 100644
--- a/safegraph_patterns/.pylintrc
+++ b/safegraph_patterns/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/usafacts/.pylintrc b/usafacts/.pylintrc
index 2a9334425..994d47417 100644
--- a/usafacts/.pylintrc
+++ b/usafacts/.pylintrc
@@ -1,8 +1,21 @@
-[DESIGN]
 
-min-public-methods=1
+[MESSAGES CONTROL]
 
+disable=logging-format-interpolation,
+    too-many-locals,
+    too-many-arguments,
+    # Allow pytest functions to be part of a class.
+    no-self-use,
+    # Allow pytest classes to have one test.
+    too-few-public-methods
 
-[MESSAGES CONTROL]
+[BASIC]
+
+# Allow arbitrarily short-named variables.
+variable-rgx=[a-z_][a-z0-9_]*
+argument-rgx=[a-z_][a-z0-9_]*
+
+[DESIGN]
 
-disable=R0801, C0330, E1101, E0611, C0114, C0116, C0103, R0913, R0914, W0702
+# Don't complain about pytest "unused" arguments.
+ignored-argument-names=(_.*|run_as_module)
\ No newline at end of file
diff --git a/usafacts/delphi_usafacts/geo.py b/usafacts/delphi_usafacts/geo.py
index ff9b50f6c..fd6284976 100644
--- a/usafacts/delphi_usafacts/geo.py
+++ b/usafacts/delphi_usafacts/geo.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+"""Functions for converting geocodes."""
 import pandas as pd
 
 
@@ -78,6 +79,11 @@
 
 FIPS_TO_STATE = {v: k.lower() for k, v in STATE_TO_FIPS.items()}
 
+# Valid geographical resolutions output by this indicator.
+VALID_GEO_RES = ("county", "state", "msa", "hrr")
+# Sensors that report proportions.  For geo resolutions with unallocated cases
+# or deaths, we avoid reporting these sensors.
+PROP_SENSORS = ("incidence", "cumulative_prop")
 
 def fips_to_state(fips: str) -> str:
     """Wrapper that handles exceptions to the FIPS scheme in the USAFacts data.
@@ -121,9 +127,9 @@ def disburse(df: pd.DataFrame, pooled_fips: str, fips_list: list):
     pd.DataFrame
         Dataframe with same schema as df, with the counts disbursed.
     """
-    COLS = ["new_counts", "cumulative_counts"]
+    cols = ["new_counts", "cumulative_counts"]
     df = df.copy().sort_values(["fips", "timestamp"])
-    for col in COLS:
+    for col in cols:
         # Get values from the aggregated county:
         vals = df.loc[df["fips"] == pooled_fips, col].values / len(fips_list)
         for fips in fips_list:
@@ -155,9 +161,6 @@ def geo_map(df: pd.DataFrame, geo_res: str, map_df: pd.DataFrame, sensor: str):
     pd.DataFrame
         Columns: geo_id, timestamp, ...
     """
-    VALID_GEO_RES = ("county", "state", "msa", "hrr")
-    #It is not clear how to calculate the proportion for unallocated cases/deaths
-    PROP_SENSORS = ("incidence", "cumulative_prop")
     if geo_res not in VALID_GEO_RES:
         raise ValueError(f"geo_res must be one of {VALID_GEO_RES}")
 
diff --git a/usafacts/delphi_usafacts/pull.py b/usafacts/delphi_usafacts/pull.py
index f8278b344..220ff2502 100644
--- a/usafacts/delphi_usafacts/pull.py
+++ b/usafacts/delphi_usafacts/pull.py
@@ -1,7 +1,16 @@
 # -*- coding: utf-8 -*-
+"""Functions for pulling data from the USAFacts website."""
 import numpy as np
 import pandas as pd
 
+# Columns to drop the the data frame.
+DROP_COLUMNS = [
+    "FIPS",
+    "County Name",
+    "State",
+    "stateFIPS"
+]
+
 
 def pull_usafacts_data(base_url: str, metric: str, pop_df: pd.DataFrame) -> pd.DataFrame:
     """Pulls the latest USA Facts data, and conforms it into a dataset
@@ -43,15 +52,6 @@ def pull_usafacts_data(base_url: str, metric: str, pop_df: pd.DataFrame) -> pd.D
     pd.DataFrame
         Dataframe as described above.
     """
-    # Constants
-    DROP_COLUMNS = [
-        "FIPS",
-        "County Name",
-        "State",
-        "stateFIPS"
-    ]
-    # MIN_FIPS = 1000
-    # MAX_FIPS = 57000
 
     # Read data
     df = pd.read_csv(base_url.format(metric=metric)).rename({"countyFIPS":"FIPS"}, axis=1)
@@ -59,8 +59,8 @@ def pull_usafacts_data(base_url: str, metric: str, pop_df: pd.DataFrame) -> pd.D
     null_mask = pd.isnull(df["FIPS"])
     assert null_mask.sum() == 0
 
-    UNEXPECTED_COLUMNS = [x for x in df.columns if "Unnamed" in x]
-    DROP_COLUMNS.extend(UNEXPECTED_COLUMNS)
+    unexpected_columns = [x for x in df.columns if "Unnamed" in x]
+    unexpected_columns.extend(DROP_COLUMNS)
 
     # Assign Grand Princess Cruise Ship a special FIPS 90000
     # df.loc[df["FIPS"] == 6000, "FIPS"] = 90000
@@ -90,7 +90,7 @@ def pull_usafacts_data(base_url: str, metric: str, pop_df: pd.DataFrame) -> pd.D
             "Tried to drop non-existent columns. The dataset "
             "schema may have changed.  Please investigate and "
             "amend DROP_COLUMNS."
-        )
+        ) from e
     # Check that columns are either FIPS or dates
     try:
         columns = list(df.columns)
@@ -99,13 +99,12 @@ def pull_usafacts_data(base_url: str, metric: str, pop_df: pd.DataFrame) -> pd.D
         # Detects whether there is a non-date string column -- not perfect
         _ = [int(x.replace("/", "")) for x in columns]
     except ValueError as e:
-        print(e)
         raise ValueError(
             "Detected unexpected column(s) "
             "after dropping DROP_COLUMNS. The dataset "
             "schema may have changed. Please investigate and "
             "amend DROP_COLUMNS."
-        )
+        ) from e
     # Reshape dataframe
     df = df.melt(
         id_vars=["fips", "population"],
diff --git a/usafacts/delphi_usafacts/run.py b/usafacts/delphi_usafacts/run.py
index a75a8b2b7..ea3fc8d6b 100644
--- a/usafacts/delphi_usafacts/run.py
+++ b/usafacts/delphi_usafacts/run.py
@@ -67,7 +67,7 @@
 
 
 def run_module():
-
+    """Run the usafacts indicator."""
     params = read_params()
     export_start_date = params["export_start_date"]
     if export_start_date == "latest":
diff --git a/usafacts/delphi_usafacts/smooth.py b/usafacts/delphi_usafacts/smooth.py
index a6c944fc2..86051fdf2 100644
--- a/usafacts/delphi_usafacts/smooth.py
+++ b/usafacts/delphi_usafacts/smooth.py
@@ -1,3 +1,4 @@
+'''Functions for smoothing signals.'''
 # -*- coding: utf-8 -*-
 import numpy as np