交换许多属性的值

Question

如何交换所有属性的值？我想要FieldIP = 1.MomentIP = 1 FieldOP = 3，依此类推。

示例表

FieldIP =3                  FieldOP    =1        
MomentIP =3                 MomentOP   =1  
NormalizeMomentIP =3        NormalizeMomentOP  =1       
ixfwdIP  =3                 ixfwdOP       =1
iyfwdIP  =3                 iyfwdOP       =1
ixbwdIP  =3                 ixbwdOP       =1
iybwdIP  =3                 iybwdOP       =1
MsAvgIP  =3                 MsAvgOP       =1
MsStdIP  =3                 MsStdOP       =1
HkIP     =3                 HkOP          =1
NegFieldIP  =3              NegFieldOP    =1
NegNormalizeMomentIP =3     NegNormalizeMomentOP  =1     
NegFieldBotIP =3            NegFieldBotOPx`       =1
NegNormalizeMomentBotIP =3  NegNormalizeMomentBotOP   =1

如何交换所有属性的值？有没有更短的方式？ 这是我所做的代码。如果我确实完成了所有14个属性，它将会很长，因为我必须声明28变量......

    x = FieldIP
    y = FieldOP
    ...
    if ( HkOP > HkIP):
        FieldOP = x
        FieldIP = y
        print "Swapped"

我想要的结果

FieldIP =1                  FieldOP    =3       
MomentIP =1                 MomentOP   =3  
NormalizeMomentIP =1        NormalizeMomentOP  =3       
ixfwdIP  =1                 ixfwdOP       =3
iyfwdIP  =1                 iyfwdOP       =3
ixbwdIP  =1                 ixbwdOP       =3
iybwdIP  =1                 iybwdOP       =3
MsAvgIP  =1                 MsAvgOP       =3
MsStdIP  =1                 MsStdOP       =3
HkIP     =1                 HkOP          =3
NegFieldIP  =1              NegFieldOP    =3
NegNormalizeMomentIP =1     NegNormalizeMomentOP  =3     
NegFieldBotIP =1            NegFieldBotOPx`       =3
NegNormalizeMomentBotIP =1  NegNormalizeMomentBotOP   =3

Answer 1

以短的方式交换两个变量

a, b = b, a

Answer 2

我假设你的这些数据是某种文本文件。

尝试这样的事情：

import re
# read your data
lines = open('mytable.txt').readlines()
# regex to capture your 'values'
regex = re.compile(r'(.*?=)([0-9]+)(.*?=)([0-9]+)')
for line in lines:
    # for each line, match the value groups and substitute swapped values
    print regex.sub(r'\1\4\3\2', line)

应该使用交换值打印表，并保留空白。

Answer 3

您可以迭代本地变量来执行此操作：

key = key2 = None
for key in locals():
    if key.endswith('OP'):
        key2 = key[:-2] + 'IP'
        if locals()[key] > locals()[key2]:
            locals()[key], locals()[key2] = locals()[key2], locals()[key]
            print 'swapped'

您必须在for循环之前声明key和key2，而不是在其中。