Final QA

python-while-loop/api_calls.py

@@ -4,7 +4,6 @@
 
 def is_api_available():
     """Simulate API availability."""
-    time.sleep(1)
     return random.choice([True, False, False, False])
 
 
@@ -19,6 +18,7 @@ def make_api_call(request):
 while True:
     if not is_api_available():
         print("API not available. Retrying in 1 sec...")
+        time.sleep(1)
         continue
     make_api_call(request)
     try:

python-while-loop/for_loop.py

@@ -0,0 +1,16 @@
+requests = ["first request", "second request", "third request"]
+
+print("\nWith a for-loop")
+for request in requests:
+    print(f"Handling {request}")
+
+
+print("\nWith a while-loop")
+it = iter(requests)
+while True:
+    try:
+        request = next(it)
+    except StopIteration:
+        break
+
+    print(f"Handling {request}")

python-while-loop/logfile.py

@@ -12,5 +12,5 @@
                 break
             print(f"Processing line content: {line_content}")
         else:
-            time.sleep(1)
             print("No new content. Retrying in 1 second...")
+            time.sleep(1)

python-while-loop/password.py

@@ -6,14 +6,14 @@
 
 while True:
     password = input("Password: ").strip()
-
     attempts += 1
-    if attempts >= MAX_ATTEMPTS:
-        print("Too many failed attempts.")
-        break
 
     if password == correct_password:
         print("Login successful! Welcome!")
         break
+
+    if attempts >= MAX_ATTEMPTS:
+        print("Too many failed attempts.")
+        break
     else:
         print(f"Incorrect password. {MAX_ATTEMPTS - attempts} attempts left.")

python-while-loop/process_pairs.py

@@ -0,0 +1,32 @@
+def process_pairs(sequence):
+    """Process a sequence, two elements at a time."""
+    it = iter(sequence)
+    while True:
+        try:
+            first = next(it)
+            second = next(it)
+        except StopIteration:
+            break
+
+        yield first, second
+
+
+scientists = [
+    "Newton",
+    "Darwin",
+    "Lovelace",
+    "Freud",
+    "Carver",
+    "Curie",
+    "Hopper",
+    "Bohr",
+]
+
+print("Pairs of scientists:")
+for first, second in process_pairs(scientists):
+    print(f"- {first} and {second}")
+
+
+print("\nWith zip()")
+for first, second in zip(scientists[::2], scientists[1::2]):
+    print(f"- {first} and {second}")

python-while-loop/temperature.py

@@ -3,14 +3,15 @@
 
 
 def read_temperature():
-    time.sleep(1)
     return random.uniform(20.0, 30.0)
 
 
 while True:
     temperature = read_temperature()
     print(f"Temperature: {temperature:.2f}°C")
 
-    if temperature >= 25:
+    if temperature >= 28:
         print("Required temperature reached! Stopping monitoring.")
         break
+
+    time.sleep(1)