python基础

最新推荐文章于 2023-09-01 21:17:28 发布

最新推荐文章于 2023-09-01 21:17:28 发布 · 166 阅读

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本文介绍了Python中多种循环技巧的应用，包括字典循环、序列循环、多个序列同步循环、倒序循环及去除重复元素的方法。通过具体示例展示了如何高效地使用for循环遍历不同数据结构。

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#-----在字典中循环
dict1={'name':'caiquan','sex':'nan','age':'24','state':'1'}
for k,b in enumerate(dict1.iteritems()):
    print k,b 
#-----在序列中循环
seq1=['tea','apple','peak','banan']
for m in enumerate(seq1):
    print m
#-----在多个序列中循环
question=['name','sex','age','state']
answer=['caiquan','nan','24','0']
anth=['22','33','44','55']
for q,n,a in zip(question,answer,anth):
    print 'question is %s , answer is %s, age is %s'% (q,n,a)
#--(1,10)之间倒序排序，间隔为2
for i in reversed(xrange(1,10,2)):    
    print i
#--无重复元组
xulie=['aa','bb','cc','dd','ee','aa','bb']
for f in sorted(set(xulie)):
    print f

输出结果：

0 ('age', '24')
1 ('state', '1')
2 ('name', 'caiquan')
3 ('sex', 'nan')
(0, 'tea')
(1, 'apple')
(2, 'peak')
(3, 'banan')
question is name , answer is caiquan, age is 22
question is sex , answer is nan, age is 33
question is age , answer is 24, age is 44
question is state , answer is 0, age is 55
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7
5
3
1
aa
bb
cc
dd
ee