list-comprehensions

l = []
for letter in 'hello':
    l.append(letter)

print l

l = [i for i in 'hello']
print l

for a in l:
    print a

lst1 = [x ** 2 for x in range(0, 11)]
print lst1

lst = [number for number in range(11) if number % 2 == 0]
print lst

celcius = [0, 10, 20.3, 34.5]
fahrenheit = [t * (9/5.0) + 32 for t in celcius]
print fahrenheit

# nested
list2 = [x**2 for x in [x**2 for x in range(11)]]
print list2