[英]How do I sort list of numerical value dictionaries?
我有两个具有6000个数值的文件,我只给出两个的前15个值。
base.txt
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
2.900000e+03
new2.txt
0
100
200
1
101
201
2
102
202
3
103
203
4
104
204
我想从base.txt值(速度)创建一个新列表,该列表对应于第二个文件的升序。(0,1,2,3,4,5,..)到目前为止,我的代码
import itertools
from operator import itemgetter
vel = [line.strip() for line in open("base.txt", 'r')]
ind = [line.strip() for line in open("new2.txt", 'r')]
print type(vel)
print type(ind)
adict = dict(itertools.izip(ind,vel))
newlist = sorted(adict, key=itemgetter(ind))
我的想法是将文件读取为列表,创建字典,然后尝试对值进行排序,但是此代码不起作用。 我懂了
<type 'list'>
<type 'list'>
Traceback (most recent call last):
File "m1.py", line 11, in <module>
newlist = sorted(adict, key=itemgetter(ind))
TypeError: string indices must be integers, not list
这些文件在这里http://pastebin.com/he1RuSnv
当我尝试CPanda的解决方案时,我得到了
2.900000e+03 0
2.900000e+03 1
2.900000e+03 10
2.900000e+03 100
2.900000e+03 1000
2.900000e+03 1001
2.900000e+03 1002
2.900000e+03 1003
2.900000e+03 1004
2.900000e+03 1005
2.900000e+03 1006
2.900000e+03 1007
2.900000e+03 1008
2.900000e+03 1009
2.900000e+03 101
2.900000e+03 1010
2.900000e+03 1011
2.900000e+03 1012
这不是我想要的,想要第二个索引去0、1、2、3、4、5等...
要解决该错误,您的最后一行应该是已sorted
newlist = [el[1] for el in sorted(adict.items())]
Sorted从字典中返回键值元组的列表。
然后用列表解析您提取有序值到您的newlist
您还可以将最后两行合并为一个:
newlist = [el[1] for el in sorted(itertools.izip(ind,vel))]
尝试这个
import itertools
with open("base.txt") as fv, open("new2.txt", 'r') as fi:
vel = (line.strip() for line in fv)
ind = (int(line.strip()) for line in fi)
z = itertools.izip(ind, vel) # sort according to ind
# itertools.izip(vel, ind) # sort according to vel
for i, v in sorted(z):
print v,i
# interactive session
l1 = ['2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03',
'2.900000e+03'] # list(vel)
l2 = [0, 100, 200, 1, 101, 201, 2, 102, 202, 3, 103, 203, 4, 104, 204] # list(ind)
# result
2.900000e+03 0
2.900000e+03 1
2.900000e+03 2
2.900000e+03 3
2.900000e+03 4
2.900000e+03 100
2.900000e+03 101
2.900000e+03 102
2.900000e+03 103
2.900000e+03 104
2.900000e+03 200
2.900000e+03 201
2.900000e+03 202
2.900000e+03 203
2.900000e+03 204
close
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