Merge pull request xianhu#10 from zhisheng17/master

update python_base.py

Author: xianhu

python_base.py

@@ -254,7 +254,7 @@
 #-- 常用字典常量和操作
  D = {}
  D = {'spam':2, 'tol':{'ham':1}} # 嵌套字典
- D = dict.fromkeys(['s', 'd'], 8) # {'d': 8, 's': 8}
+ D = dict.fromkeys(['s', 'd'], 8) # {'s': 8, 'd': 8}
  D = dict(name = 'tom', age = 12) # {'age': 12, 'name': 'tom'}
  D = dict([('name', 'tom'), ('age', 12)]) # {'age': 12, 'name': 'tom'}
  D = dict(zip(['name', 'age'], ['tom', 12])) # {'age': 12, 'name': 'tom'}
@@ -270,8 +270,8 @@
  # 字典注意事项：（1）对新索引赋值会添加一项（2）字典键不一定非得是字符串，也可以为任何的不可变对象
 
 #-- 字典解析
- D = {k:8 for k in ['s', 'd']} # {'d': 8, 's': 8}
- D = {k:v for (k, v) in zip(['name', 'age'], ['tom', 12])}
+ D = {k:8 for k in ['s', 'd']} # {'s': 8, 'd': 8}
+ D = {k:v for (k, v) in zip(['name', 'age'], ['tom', 12])} # {'age': 12, 'name': tom}
 
 #-- 字典的特殊方法__missing__：当查找找不到key时，会执行该方法
  class Dict(dict):
@@ -335,8 +335,8 @@ def __missing__(self, key):
 
 #-- 序列赋值 序列解包
  [a, b, c] = (1, 2, 3) # a = 1, b = 2, c = 3
- a, b, c, d = "spam" # a = 's', b = 'p'
- a, b, c = range(3) # a = 0, b = 1
+ a, b, c, d = "spam" # a = 's', b = 'p', c = 'a', d = 'm'
+ a, b, c = range(3) # a = 0, b = 1, c = 2
  a, *b = [1, 2, 3, 4] # a = 1, b = [2, 3, 4]
  *a, b = [1, 2, 3, 4] # a = [1, 2, 3], b = 4
  a, *b, c = [1, 2, 3, 4] # a = 1, b = [2, 3], c = 4