Class content
1. Determine the level of each grade
score = int(input ("成绩"))
if 90 <= score <= 100:
print ('A')
elif 80 <score <=90:
print ('B')
elif 70<score <=80:
print ('C')
elif 0<score <=60:
print ('D')
score = int(input('score'))
if 100>= score >= 90:
print ('A')
elif 90> score >= 80:
print ('B')
elif 80> score >= 60:
print ('C')
elif 60> score >= 0:
print ('D')
2. Ternary operator:
x= 4, y=5
if x < y
small = x:
else
small = y
small = x if x < y else y (if the value of x < y is expected to be true, small is equal to x; otherwise small is equal to y)
3. assert assertion:
If the condition after assert is false, the program automatically crashes with an AssertionError