根据SICP，一门语言有以下模式：

• primitive expressions, which represent the simplest entities the
  language is concerned with,

• means of combination, by which compound elements are built
  from simpler ones, and

• means of abstraction, by which compound elements can be named
  and manipulated as units.

Combination

if

if xxx:
elif xxx:
elif xxx:
else:

for

for x in array:
for x,y in tuple:

range()

It is an object which returns
the successive items of the desired sequence when you iterate over it, but it doesn’t really make the list, thus saving space.

特色

range(5)
## 5为上界
      0, 1, 2, 3, 4
## 5为下界，10为上界
range(5, 10)
      5, 6, 7, 8, 9
range(5, 10, 4)
## 4为步长
      5, 9
range(-10, -100, -30)
## 注意上下界

python 简明扼要教程

原文：https://www.cnblogs.com/Neteraxe/p/14023704.html