Python dictionary and zip

1. len(myDict)
2. eletment in myDict
3. for key in myDict:
4. for key in myDict.keys()
5. for key, value in myDict.items():
6. for value in myDict.values():

1. myDict,ckear()
2. aDict,update(bDict) - for each key in bDict, updates aDict with that key/value pair

zip() is the built-in function

1. zip("abc", [1, 2, 3])  --> [(‘a’,1),(‘b’,2),(‘c’,3)] 
2. dict(zip("abc", [1, 2, 3]) -->{'a': 1, 'c': 3, 'b': 2} 

aString = "\n".join(aList)

aList = aString.split("\n")

OrderedDict
reports = collections.OrderedDict()
the OrderedDict will remember the sequence of key insertion