diff --git a/src/04-asyncio/loops/loops_asyncio/loop_program.py b/src/04-asyncio/loops/loops_asyncio/loop_program.py
index 4569cfb..b746451 100644
--- a/src/04-asyncio/loops/loops_asyncio/loop_program.py
+++ b/src/04-asyncio/loops/loops_asyncio/loop_program.py
@@ -5,10 +5,13 @@
 
 def main():
     lim = 250_000
-    print("Running standard loop with {:,} actions.".format(lim*2))
+    print(f"Running standard loop with {lim * 2:,} actions.")
     t0 = datetime.datetime.now()
 
-    loop = asyncio.get_event_loop()
+    # Changed this from the video due to changes in Python 3.10:
+    # DeprecationWarning: There is no current event loop, loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
+
     data = asyncio.Queue()
 
     task1 = loop.create_task(generate_data(lim, data))
@@ -19,7 +22,7 @@ def main():
     loop.run_until_complete(final_task)
 
     dt = datetime.datetime.now() - t0
-    print(colorama.Fore.WHITE + "App exiting, total time: {:,.2f} sec.".format(dt.total_seconds()), flush=True)
+    print(colorama.Fore.WHITE + f"App exiting, total time: {dt.total_seconds():,.2f} sec.", flush=True)
 
 
 async def generate_data(num: int, data: asyncio.Queue):
diff --git a/src/04-asyncio/loops/loops_uv/loop_program_uv.py b/src/04-asyncio/loops/loops_uv/loop_program_uv.py
index 570d0c7..c32747e 100644
--- a/src/04-asyncio/loops/loops_uv/loop_program_uv.py
+++ b/src/04-asyncio/loops/loops_uv/loop_program_uv.py
@@ -8,10 +8,12 @@
 
 def main():
     lim = 250000
-    print("Running standard loop with {:,} actions.".format(lim * 2))
+    print(f"Running standard loop with {lim * 2:,} actions.")
     t0 = datetime.datetime.now()
 
-    loop = asyncio.get_event_loop()
+    # Changed this from the video due to changes in Python 3.10:
+    # DeprecationWarning: There is no current event loop, loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
     data = asyncio.Queue()
 
     task1 = loop.create_task(generate_data(lim, data))
@@ -22,7 +24,7 @@ def main():
     loop.run_until_complete(final_task)
 
     dt = datetime.datetime.now() - t0
-    print(colorama.Fore.WHITE + "App exiting, total time: {:,.2f} sec.".format(dt.total_seconds()), flush=True)
+    print(colorama.Fore.WHITE + f"App exiting, total time: {dt.total_seconds():,.2f} sec.", flush=True)
 
 
 async def generate_data(num: int, data: asyncio.Queue):
diff --git a/src/04-asyncio/producer_consumer/prod_async/async_program.py b/src/04-asyncio/producer_consumer/prod_async/async_program.py
index 4ae98f8..bbf32d1 100644
--- a/src/04-asyncio/producer_consumer/prod_async/async_program.py
+++ b/src/04-asyncio/producer_consumer/prod_async/async_program.py
@@ -5,8 +5,9 @@
 
 
 def main():
-
-    loop = asyncio.get_event_loop()
+    # Changed this from the video due to changes in Python 3.10:
+    # DeprecationWarning: There is no current event loop, loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
 
     t0 = datetime.datetime.now()
     print(colorama.Fore.WHITE + "App started.", flush=True)
@@ -21,7 +22,7 @@ def main():
     loop.run_until_complete(final_task)
 
     dt = datetime.datetime.now() - t0
-    print(colorama.Fore.WHITE + "App exiting, total time: {:,.2f} sec.".format(dt.total_seconds()), flush=True)
+    print(colorama.Fore.WHITE + f"App exiting, total time: {dt.total_seconds():,.2f} sec.", flush=True)
 
 
 async def generate_data(num: int, data: asyncio.Queue):
@@ -29,7 +30,7 @@ async def generate_data(num: int, data: asyncio.Queue):
         item = idx*idx
         await data.put((item, datetime.datetime.now()))
 
-        print(colorama.Fore.YELLOW + " -- generated item {}".format(idx), flush=True)
+        print(colorama.Fore.YELLOW + f" -- generated item {idx}", flush=True)
         await asyncio.sleep(random.random() + .5)
 
 
@@ -44,7 +45,7 @@ async def process_data(num: int, data: asyncio.Queue):
         dt = datetime.datetime.now() - t
 
         print(colorama.Fore.CYAN +
-              " +++ Processed value {} after {:,.2f} sec.".format(value, dt.total_seconds()), flush=True)
+              f" +++ Processed value {value} after {dt.total_seconds():,.2f} sec.", flush=True)
         await asyncio.sleep(.5)
 
 
diff --git a/src/04-asyncio/producer_consumer/prod_sync/sync_program.py b/src/04-asyncio/producer_consumer/prod_sync/sync_program.py
index 2ecef0c..1530d95 100644
--- a/src/04-asyncio/producer_consumer/prod_sync/sync_program.py
+++ b/src/04-asyncio/producer_consumer/prod_sync/sync_program.py
@@ -12,7 +12,7 @@ def main():
     process_data(20, data)
 
     dt = datetime.datetime.now() - t0
-    print(colorama.Fore.WHITE + "App exiting, total time: {:,.2f} sec.".format(dt.total_seconds()), flush=True)
+    print(colorama.Fore.WHITE + f"App exiting, total time: {dt.total_seconds():,.2f} sec.", flush=True)
 
 
 def generate_data(num: int, data: list):
@@ -20,7 +20,7 @@ def generate_data(num: int, data: list):
         item = idx*idx
         data.append((item, datetime.datetime.now()))
 
-        print(colorama.Fore.YELLOW + " -- generated item {}".format(idx), flush=True)
+        print(colorama.Fore.YELLOW + f" -- generated item {idx}", flush=True)
         time.sleep(random.random() + .5)
 
 
@@ -38,7 +38,7 @@ def process_data(num: int, data: list):
         dt = datetime.datetime.now() - t
 
         print(colorama.Fore.CYAN +
-              " +++ Processed value {} after {:,.2f} sec.".format(value, dt.total_seconds()), flush=True)
+              f" +++ Processed value {value} after {dt.total_seconds():,.2f} sec.", flush=True)
         time.sleep(.5)
 
 
diff --git a/src/04-asyncio/web_scraping/async_scrape/program.py b/src/04-asyncio/web_scraping/async_scrape/program.py
index 58984fa..e82a075 100644
--- a/src/04-asyncio/web_scraping/async_scrape/program.py
+++ b/src/04-asyncio/web_scraping/async_scrape/program.py
@@ -36,7 +36,9 @@ def main():
     t0 = datetime.datetime.now()
 
     global loop
-    loop = asyncio.get_event_loop()
+    # Changed this from the video due to changes in Python 3.10:
+    # DeprecationWarning: There is no current event loop, loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
     loop.run_until_complete(get_title_range())
 
     dt = datetime.datetime.now() - t0
@@ -55,7 +57,7 @@ async def get_title_range():
     # Please keep this range pretty small to not DDoS my site. ;)
 
     tasks = []
-    for n in range(150, 160):
+    for n in range(375, 385):
         tasks.append((n, loop.create_task(get_html(n))))
 
     for n, t in tasks:
diff --git a/src/04-asyncio/web_scraping/sync_scrape/program.py b/src/04-asyncio/web_scraping/sync_scrape/program.py
index cb5ac39..c37d8b0 100644
--- a/src/04-asyncio/web_scraping/sync_scrape/program.py
+++ b/src/04-asyncio/web_scraping/sync_scrape/program.py
@@ -34,7 +34,7 @@ def main():
 
 def get_title_range():
     # Please keep this range pretty small to not DDoS my site. ;)
-    for n in range(150, 160):
+    for n in range(375, 385):
         html = get_html(n)
         title = get_title(html, n)
         print(Fore.WHITE + f"Title found: {title}", flush=True)
diff --git a/src/05-threads/basic_threads/sync_prod.py b/src/05-threads/basic_threads/sync_prod.py
index 17353b8..cf5c875 100644
--- a/src/05-threads/basic_threads/sync_prod.py
+++ b/src/05-threads/basic_threads/sync_prod.py
@@ -14,7 +14,7 @@ def main():
     process_data(40, data)
 
     dt = datetime.datetime.now() - t0
-    print(colorama.Fore.WHITE + "App exiting, total time: {:,.2f} sec.".format(dt.total_seconds()), flush=True)
+    print(colorama.Fore.WHITE + f"App exiting, total time: {dt.total_seconds():,.2f} sec.", flush=True)
 
 
 def generate_data(num: int, data: list):
@@ -40,7 +40,7 @@ def process_data(num: int, data: list):
         dt = datetime.datetime.now() - t
 
         print(colorama.Fore.CYAN +
-              " +++ Processed value {} after {:,.2f} sec.".format(value, dt.total_seconds()), flush=True)
+              f" +++ Processed value {value} after {dt.total_seconds():,.2f} sec.", flush=True)
         time.sleep(.5)
 
 
diff --git a/src/05-threads/basic_threads/threaded_prod.py b/src/05-threads/basic_threads/threaded_prod.py
index ad8bc90..62224c3 100644
--- a/src/05-threads/basic_threads/threaded_prod.py
+++ b/src/05-threads/basic_threads/threaded_prod.py
@@ -28,7 +28,7 @@ def main():
             break
 
     dt = datetime.datetime.now() - t0
-    print(colorama.Fore.WHITE + "App exiting, total time: {:,.2f} sec.".format(dt.total_seconds()), flush=True)
+    print(colorama.Fore.WHITE + f"App exiting, total time: {dt.total_seconds():,.2f} sec.", flush=True)
 
 
 def check_cancel():
@@ -62,7 +62,7 @@ def process_data(num: int, data: list):
         dt = datetime.datetime.now() - t
 
         print(colorama.Fore.CYAN +
-              " +++ Processed value {} after {:,.2f} sec.".format(value, dt.total_seconds()), flush=True)
+              f" +++ Processed value {value} after {dt.total_seconds():,.2f} sec.", flush=True)
         time.sleep(.5)
 
 
diff --git a/src/05-threads/cpu_attempt/compute_it.py b/src/05-threads/cpu_attempt/compute_it.py
index 415471e..e3d7900 100644
--- a/src/05-threads/cpu_attempt/compute_it.py
+++ b/src/05-threads/cpu_attempt/compute_it.py
@@ -10,7 +10,7 @@ def main():
     do_math(num=30000000)
 
     dt = datetime.datetime.now() - t0
-    print("Done in {:,.2f} sec.".format(dt.total_seconds()))
+    print(f"Done in {dt.total_seconds():,.2f} sec.")
 
 
 def do_math(start=0, num=10):
diff --git a/src/05-threads/cpu_attempt/compute_threaded.py b/src/05-threads/cpu_attempt/compute_threaded.py
index 59d8dab..20e73f3 100644
--- a/src/05-threads/cpu_attempt/compute_threaded.py
+++ b/src/05-threads/cpu_attempt/compute_threaded.py
@@ -10,7 +10,7 @@ def main():
     t0 = datetime.datetime.now()
 
     # do_math(num=30000000)
-    print("Doing math on {:,} processors.".format(multiprocessing.cpu_count()))
+    print(f"Doing math on {multiprocessing.cpu_count():,} processors.")
 
     processor_count = multiprocessing.cpu_count()
     threads = []
@@ -25,7 +25,7 @@ def main():
     [t.join() for t in threads]
 
     dt = datetime.datetime.now() - t0
-    print("Done in {:,.2f} sec.".format(dt.total_seconds()))
+    print(f"Done in {dt.total_seconds():,.2f} sec.")
 
 
 def do_math(start=0, num=10):
diff --git a/src/05-threads/hello_threads/hello.py b/src/05-threads/hello_threads/hello.py
index 4585c4b..2756eb0 100644
--- a/src/05-threads/hello_threads/hello.py
+++ b/src/05-threads/hello_threads/hello.py
@@ -22,7 +22,7 @@ def main():
 
 def greeter(name: str, times: int):
     for n in range(0, times):
-        print("{}. Hello there {}".format(n, name))
+        print(f"{n}. Hello there {name}")
         time.sleep(1)
 
 
diff --git a/src/06-thread-safety/safe_bank.py b/src/06-thread-safety/safe_bank.py
index 800a088..06c99f6 100644
--- a/src/06-thread-safety/safe_bank.py
+++ b/src/06-thread-safety/safe_bank.py
@@ -32,7 +32,7 @@ def main():
 
     dt = datetime.datetime.now() - t0
 
-    print("Transfers complete ({:,.2f}) sec".format(dt.total_seconds()))
+    print(f"Transfers complete ({dt.total_seconds():,.2f}) sec")
     validate_bank(accounts, total)
 
 
@@ -87,8 +87,7 @@ def validate_bank(accounts: List[Account], total: int, quiet=False):
             current, total
         ), flush=True)
     elif not quiet:
-        print("All good: Consistent account balance: ${:,}".format(
-            total), flush=True)
+        print(f"All good: Consistent account balance: ${total:,}", flush=True)
 
 
 def get_two_accounts(accounts):
diff --git a/src/06-thread-safety/safe_bank_fine_grained.py b/src/06-thread-safety/safe_bank_fine_grained.py
index c786964..83be9dc 100644
--- a/src/06-thread-safety/safe_bank_fine_grained.py
+++ b/src/06-thread-safety/safe_bank_fine_grained.py
@@ -33,7 +33,7 @@ def main():
 
     dt = datetime.datetime.now() - t0
 
-    print("Transfers complete ({:,.2f}) sec".format(dt.total_seconds()))
+    print(f"Transfers complete ({dt.total_seconds():,.2f}) sec")
     validate_bank(accounts, total)
 
 
@@ -91,7 +91,7 @@ def validate_bank(accounts: List[Account], total: int, quiet=False):
     # with transfer_lock:
     #     current = sum(a.balance for a in accounts)
 
-    [a.lock.acquire() for a in accounts]
+    [a.lock.acquire() for a in sorted(accounts, key=lambda x: id(x))]
     current = sum(a.balance for a in accounts)
     [a.lock.release() for a in accounts]
 
@@ -100,8 +100,7 @@ def validate_bank(accounts: List[Account], total: int, quiet=False):
             current, total
         ), flush=True)
     elif not quiet:
-        print("All good: Consistent account balance: ${:,}".format(
-            total), flush=True)
+        print(f"All good: Consistent account balance: ${total:,}", flush=True)
 
 
 def get_two_accounts(accounts):
diff --git a/src/06-thread-safety/unsafe_bank.py b/src/06-thread-safety/unsafe_bank.py
index 518d16f..45f9096 100644
--- a/src/06-thread-safety/unsafe_bank.py
+++ b/src/06-thread-safety/unsafe_bank.py
@@ -32,7 +32,7 @@ def main():
 
     dt = datetime.datetime.now() - t0
 
-    print("Transfers complete ({:,.2f}) sec".format(dt.total_seconds()))
+    print(f"Transfers complete ({dt.total_seconds():,.2f}) sec")
     validate_bank(accounts, total)
 
 
@@ -71,8 +71,7 @@ def validate_bank(accounts: List[Account], total: int, quiet=False):
             current, total
         ), flush=True)
     elif not quiet:
-        print("All good: Consistent account balance: ${:,}".format(
-            total), flush=True)
+        print(f"All good: Consistent account balance: ${total:,}", flush=True)
 
 
 def get_two_accounts(accounts):
diff --git a/src/07-multiprocessing/cpu_attempt/compute_it.py b/src/07-multiprocessing/cpu_attempt/compute_it.py
index 415471e..e3d7900 100644
--- a/src/07-multiprocessing/cpu_attempt/compute_it.py
+++ b/src/07-multiprocessing/cpu_attempt/compute_it.py
@@ -10,7 +10,7 @@ def main():
     do_math(num=30000000)
 
     dt = datetime.datetime.now() - t0
-    print("Done in {:,.2f} sec.".format(dt.total_seconds()))
+    print(f"Done in {dt.total_seconds():,.2f} sec.")
 
 
 def do_math(start=0, num=10):
diff --git a/src/07-multiprocessing/cpu_attempt/compute_multiprocessing.py b/src/07-multiprocessing/cpu_attempt/compute_multiprocessing.py
index a31fccd..2272a60 100644
--- a/src/07-multiprocessing/cpu_attempt/compute_multiprocessing.py
+++ b/src/07-multiprocessing/cpu_attempt/compute_multiprocessing.py
@@ -8,7 +8,7 @@ def main():
 
     t0 = datetime.datetime.now()
 
-    print("Doing math on {:,} processors.".format(multiprocessing.cpu_count()))
+    print(f"Doing math on {multiprocessing.cpu_count():,} processors.")
 
     pool = multiprocessing.Pool()
     processor_count = multiprocessing.cpu_count()
@@ -22,7 +22,7 @@ def main():
     pool.join()
 
     dt = datetime.datetime.now() - t0
-    print("Done in {:,.2f} sec.".format(dt.total_seconds()))
+    print(f"Done in {dt.total_seconds():,.2f} sec.")
     print("Our results: ")
     for t in tasks:
         print(t.get())
diff --git a/src/07-multiprocessing/cpu_attempt/compute_threaded.py b/src/07-multiprocessing/cpu_attempt/compute_threaded.py
index 59d8dab..20e73f3 100644
--- a/src/07-multiprocessing/cpu_attempt/compute_threaded.py
+++ b/src/07-multiprocessing/cpu_attempt/compute_threaded.py
@@ -10,7 +10,7 @@ def main():
     t0 = datetime.datetime.now()
 
     # do_math(num=30000000)
-    print("Doing math on {:,} processors.".format(multiprocessing.cpu_count()))
+    print(f"Doing math on {multiprocessing.cpu_count():,} processors.")
 
     processor_count = multiprocessing.cpu_count()
     threads = []
@@ -25,7 +25,7 @@ def main():
     [t.join() for t in threads]
 
     dt = datetime.datetime.now() - t0
-    print("Done in {:,.2f} sec.".format(dt.total_seconds()))
+    print(f"Done in {dt.total_seconds():,.2f} sec.")
 
 
 def do_math(start=0, num=10):
diff --git a/src/08-execution-pools/program.py b/src/08-execution-pools/program.py
index 432e431..a24c473 100644
--- a/src/08-execution-pools/program.py
+++ b/src/08-execution-pools/program.py
@@ -29,7 +29,7 @@ def main():
 
     print("Done", flush=True)
     for f in work:
-        print("{}".format(f.result()), flush=True)
+        print(f"{f.result()}", flush=True)
 
 
 def get_title(url: str) -> str:
diff --git a/src/09-built-on-asyncio/the_trio/prod_asyncio.py b/src/09-built-on-asyncio/the_trio/prod_asyncio.py
index 769316f..2d280a8 100644
--- a/src/09-built-on-asyncio/the_trio/prod_asyncio.py
+++ b/src/09-built-on-asyncio/the_trio/prod_asyncio.py
@@ -8,7 +8,9 @@ def main():
     t0 = datetime.datetime.now()
     print(colorama.Fore.WHITE + "App started.", flush=True)
 
-    loop = asyncio.get_event_loop()
+    # Changed this from the video due to changes in Python 3.10:
+    # DeprecationWarning: There is no current event loop, loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
     data = asyncio.Queue()
 
     task1 = loop.create_task(generate_data(20, data))
diff --git a/src/09-built-on-asyncio/the_unsync/nosync.py b/src/09-built-on-asyncio/the_unsync/nosync.py
index 2b14dd1..f1ef2b4 100644
--- a/src/09-built-on-asyncio/the_unsync/nosync.py
+++ b/src/09-built-on-asyncio/the_unsync/nosync.py
@@ -20,7 +20,7 @@ def main():
     wait_some()
 
     dt = datetime.datetime.now() - t0
-    print("Synchronous version done in {:,.2f} seconds.".format(dt.total_seconds()))
+    print(f"Synchronous version done in {dt.total_seconds():,.2f} seconds.")
 
 
 def compute_some():
@@ -37,7 +37,7 @@ def download_some():
 
     text = resp.text
 
-    print("Downloaded (more) {:,} characters.".format(len(text)))
+    print(f"Downloaded (more) {len(text):,} characters.")
 
 
 def download_some_more():
@@ -48,7 +48,7 @@ def download_some_more():
 
     text = resp.text
 
-    print("Downloaded {:,} characters.".format(len(text)))
+    print(f"Downloaded {len(text):,} characters.")
 
 
 def wait_some():
diff --git a/src/09-built-on-asyncio/the_unsync/presync.py b/src/09-built-on-asyncio/the_unsync/presync.py
index 9d2f42b..61577ad 100644
--- a/src/09-built-on-asyncio/the_unsync/presync.py
+++ b/src/09-built-on-asyncio/the_unsync/presync.py
@@ -9,7 +9,9 @@
 def main():
     t0 = datetime.datetime.now()
 
-    loop = asyncio.get_event_loop()
+    # Changed this from the video due to changes in Python 3.10:
+    # DeprecationWarning: There is no current event loop, loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
 
     tasks = [
         loop.create_task(compute_some()),
@@ -28,7 +30,7 @@ def main():
     loop.run_until_complete(asyncio.gather(*tasks))
 
     dt = datetime.datetime.now() - t0
-    print("Synchronous version done in {:,.2f} seconds.".format(dt.total_seconds()))
+    print(f"Synchronous version done in {dt.total_seconds():,.2f} seconds.")
 
 
 async def compute_some():
@@ -46,7 +48,7 @@ async def download_some():
 
             text = await resp.text()
 
-    print("Downloaded (more) {:,} characters.".format(len(text)))
+    print(f"Downloaded (more) {len(text):,} characters.")
 
 
 async def download_some_more():
@@ -57,7 +59,7 @@ async def download_some_more():
 
     text = resp.text
 
-    print("Downloaded {:,} characters.".format(len(text)))
+    print(f"Downloaded {len(text):,} characters.")
 
 
 async def wait_some():
diff --git a/src/09-built-on-asyncio/the_unsync/thesync.py b/src/09-built-on-asyncio/the_unsync/thesync.py
index a27c1d5..22d0594 100644
--- a/src/09-built-on-asyncio/the_unsync/thesync.py
+++ b/src/09-built-on-asyncio/the_unsync/thesync.py
@@ -27,7 +27,7 @@ def main():
     [t.result() for t in tasks]
 
     dt = datetime.datetime.now() - t0
-    print("Synchronous version done in {:,.2f} seconds.".format(dt.total_seconds()))
+    print(f"Synchronous version done in {dt.total_seconds():,.2f} seconds.")
 
 
 @unsync(cpu_bound=True)
@@ -47,7 +47,7 @@ async def download_some():
 
             text = await resp.text()
 
-    print("Downloaded (more) {:,} characters.".format(len(text)))
+    print(f"Downloaded (more) {len(text):,} characters.")
 
 
 @unsync()
@@ -59,7 +59,7 @@ def download_some_more():
 
     text = resp.text
 
-    print("Downloaded {:,} characters.".format(len(text)))
+    print(f"Downloaded {len(text):,} characters.")
 
 
 @unsync()
diff --git a/src/10-async-web/acityscape_api/app.py b/src/10-async-web/acityscape_api/app.py
index f72bf3a..8af2506 100644
--- a/src/10-async-web/acityscape_api/app.py
+++ b/src/10-async-web/acityscape_api/app.py
@@ -21,7 +21,7 @@ def configure_app():
     services.sun_service.use_cached_data = data.get('use_cached_data')
     services.location_service.use_cached_data = data.get('use_cached_data')
 
-    print("Using cached data? {}".format(data.get('use_cached_data')))
+    print(f"Using cached data? {data.get('use_cached_data')}")
 
 
 def run_web_app():
diff --git a/src/10-async-web/acityscape_api/views/city_api.py b/src/10-async-web/acityscape_api/views/city_api.py
index 9162201..bfd72b6 100644
--- a/src/10-async-web/acityscape_api/views/city_api.py
+++ b/src/10-async-web/acityscape_api/views/city_api.py
@@ -1,7 +1,7 @@
 import quart
 from services import weather_service, sun_service, location_service
 
-blueprint = quart.blueprints.Blueprint(__name__, __name__)
+blueprint = quart.blueprints.Blueprint("city_api", "city_api")
 
 
 @blueprint.route('/api/weather/<zip_code>/<country>', methods=['GET'])
diff --git a/src/10-async-web/acityscape_api/views/home.py b/src/10-async-web/acityscape_api/views/home.py
index 432d5de..9e995a0 100644
--- a/src/10-async-web/acityscape_api/views/home.py
+++ b/src/10-async-web/acityscape_api/views/home.py
@@ -1,6 +1,6 @@
 import quart
 
-blueprint = quart.blueprints.Blueprint(__name__, __name__)
+blueprint = quart.blueprints.Blueprint("home", "home")
 
 
 @blueprint.route('/')
diff --git a/src/10-async-web/cityscape_api/app.py b/src/10-async-web/cityscape_api/app.py
index 40eb65a..0b534aa 100644
--- a/src/10-async-web/cityscape_api/app.py
+++ b/src/10-async-web/cityscape_api/app.py
@@ -21,7 +21,7 @@ def configure_app():
     services.sun_service.use_cached_data = data.get('use_cached_data')
     services.location_service.use_cached_data = data.get('use_cached_data')
 
-    print("Using cached data? {}".format(data.get('use_cached_data')))
+    print(f"Using cached data? {data.get('use_cached_data')}")
 
 
 def run_web_app():
diff --git a/src/10-async-web/cityscape_api/views/city_api.py b/src/10-async-web/cityscape_api/views/city_api.py
index 8b238c0..9173c0c 100644
--- a/src/10-async-web/cityscape_api/views/city_api.py
+++ b/src/10-async-web/cityscape_api/views/city_api.py
@@ -1,7 +1,7 @@
 import flask
 from services import weather_service, sun_service, location_service
 
-blueprint = flask.blueprints.Blueprint(__name__, __name__)
+blueprint = flask.blueprints.Blueprint("city_api", "city_api")
 
 
 @blueprint.route('/api/weather/<zip_code>/<country>', methods=['GET'])
diff --git a/src/10-async-web/cityscape_api/views/home.py b/src/10-async-web/cityscape_api/views/home.py
index cb725eb..a18b105 100644
--- a/src/10-async-web/cityscape_api/views/home.py
+++ b/src/10-async-web/cityscape_api/views/home.py
@@ -1,6 +1,6 @@
 import flask
 
-blueprint = flask.blueprints.Blueprint(__name__, __name__)
+blueprint = flask.blueprints.Blueprint("home", "home")
 
 
 @blueprint.route('/')
diff --git a/src/11-cython/perf/compute_cython.py b/src/11-cython/perf/compute_cython.py
index 38d4040..22551d4 100644
--- a/src/11-cython/perf/compute_cython.py
+++ b/src/11-cython/perf/compute_cython.py
@@ -7,7 +7,7 @@
 def main():
     math_core.do_math(1)
 
-    print("Doing math on {:,} processors.".format(multiprocessing.cpu_count()))
+    print(f"Doing math on {multiprocessing.cpu_count():,} processors.")
 
     processor_count = multiprocessing.cpu_count()
     threads = []
@@ -25,7 +25,7 @@ def main():
     # math_core.do_math(num=300_000)
 
     dt = datetime.datetime.now() - t0
-    print("Done in {:,.2f} sec. (factor: {:,.2f}x)".format(
+    print("Done in {:,.4f} sec. (factor: {:,.2f}x)".format(
         dt.total_seconds(),
         0.80 / dt.total_seconds())
     )
diff --git a/src/11-cython/perf/compute_it.py b/src/11-cython/perf/compute_it.py
index 93087f5..51ab1b4 100644
--- a/src/11-cython/perf/compute_it.py
+++ b/src/11-cython/perf/compute_it.py
@@ -10,7 +10,7 @@ def main():
     do_math(num=3_000_000)
 
     dt = datetime.datetime.now() - t0
-    print("Done in {:,.2f} sec.".format(dt.total_seconds()))
+    print(f"Done in {dt.total_seconds():,.2f} sec.")
 
 
 def do_math(start=0, num=10):
diff --git a/src/11-cython/perf/compute_multiprocessing.py b/src/11-cython/perf/compute_multiprocessing.py
index e41694f..490343d 100644
--- a/src/11-cython/perf/compute_multiprocessing.py
+++ b/src/11-cython/perf/compute_multiprocessing.py
@@ -8,7 +8,7 @@ def main():
 
     t0 = datetime.datetime.now()
 
-    print("Doing math on {:,} processors.".format(multiprocessing.cpu_count()))
+    print(f"Doing math on {multiprocessing.cpu_count():,} processors.")
 
     pool = multiprocessing.Pool()
     processor_count = multiprocessing.cpu_count()
diff --git a/src/11-cython/perf/compute_threaded.py b/src/11-cython/perf/compute_threaded.py
index 83006a2..be5ba46 100644
--- a/src/11-cython/perf/compute_threaded.py
+++ b/src/11-cython/perf/compute_threaded.py
@@ -10,7 +10,7 @@ def main():
     t0 = datetime.datetime.now()
 
     # do_math(num=30000000)
-    print("Doing math on {:,} processors.".format(multiprocessing.cpu_count()))
+    print(f"Doing math on {multiprocessing.cpu_count():,} processors.")
 
     processor_count = multiprocessing.cpu_count()
     threads = []