When you have a piece of code you want to run x number of times, then code within that code which you want to run y number of times, you use what is known as a nested loop. In Python, these are heavily used whenever someone has a list of lists-an iterable object within an iterable object.1  Early exits.f you've done any programming before, there's no doubt you've come across a for loop or an equivalent to it. In Python, they work a little differently. Basically, any object with an iterable method can be used in a for loop in Python.
If the result is abnormal, it is typically followed up with a fasting blood glucose test or a GTT. Glucose blood tests are also used to screen pregnant women for gestational diabetes between their 24th and 28th week of pregnancy.
1 Fasting glucose (fasting blood glucose, FBG) â this test measures the level of glucose in the blood after fasting for at least 8 hours. 2  2-hour glucose tolerance test (GTT) â for this test, the person has a fasting glucose test done (see above), then drinks a 75-gram glucose drink.