Python——Dict类型
以下是学习goole PYTHON教程过程中的一些笔记。'#' 后面的是输出，希望你能从中获取你想要的。
Dict
d = {}
d['a'] = 'alpha'
d['g'] = 'gamma'
d['o'] = 'omega'
d['a'] #'alpha'
d['x'] #error
d.get('x') #
d.get('a') #'alpha'
'a' in d #True
'x' in d #False
d.keys() #['a,','g','o']
d.values() #['alpha','gamma',omega]
for k in sorted(d.keys()): print 'key:', k, '->' ,d
#key: a -> alpha
#key: g -> gamma
#key: o -> omega
d.items()
#[('a', 'alpha'), ('g', 'gamma'), ('o', 'omega')]
for tuple in d.items(): print tuple
#('a', 'alpha')
#('g', 'gamma')
#('o', 'omega')
def Cat(filename):
f = open(filename, 'rU')
#lines = f.readlines()
#print lines#lines is a list
text = f.read()
print text, #read the entile file into a string
#print line,#without a newline
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