python_list_2017_7_21

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TBD

  1. iterate two lists
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a1 = ['CHN', 'SG','MY']
b2 = ['people', 'hill', 'durian']
for key, value in zip(a1, b2):
	print(key ' has ' value)
  1. index with a list
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a1 = ['CHN', 'SG','MY']
id_a1 = {num: value for value, num in enumerate(a1)}
  1. list to str
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a1 = ['CHN', 'SG','MY']
print(','.join(a1))

列表插入值：a[1:1] = [3,4]
保留首尾：a[1:-1]

  1. zip
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matrix = [[1, 2, 3] , [4, 5, 6]]
res = zip(*matrix)
print(res)
## [(1, 4), (2,5), (3, 6)]