Question

我有下面的python代码，应检查cfg中参数的值是否具有可在字典dict_methos_modes中找到的正确值，请参阅下文：

因此，如果tmp_method是粗略的＆＃39;那么参数模式（来自cfg文件）应该只有一个值：＆＃39; per_node＆＃39;，＆＃39; master_only＆＃39;，＆＃39; slave_only＆＃39;，＆＃39; master_slave＆＃39 ;.如果参数模式具有不同的值，则代码应删除该选项，并在下一步中添加默认值！

listSectionsInCfg = ['Settings', 'Run']
listSettingsParameters = ['method', 'mode']
listExecutionParameters = ['test']

dict_methods_modes = {
'rough':['per_node', 'master_only', 'slave_only', 'master_slave'],
'medium':['replica', 'master', 'slave']}

cfg = ConfigParser.SafeConfigParser()
cfg.optionxform = str
cfg.read(file)
try:
    for section in listSectionsCfg:
        print 'Now reading %s'%(section)
        assert cfg.has_section(section)
        if section == 'Settings': listCandidate = listSettingsParameters
        if section == 'Run': listCandidate = listExecutionParameters
        for candidate in listCandidate:
            if 'method' == candidate:
                if cfg.has_option(section, candidate):
                    tmp_method = cfg.get(section, candidate)
                    if all(x != tmp_method for x in dict_methods_modes):
                        print '%s.%-12s  : %s -> wrong syntax, cleared'%(section, candidate, tmp_method)
                        cfg.remove_option(section, candidate)
            elif 'mode' == candidate:
                tmp_method = cfg.get(section, 'method')
                if cfg.has_option(section, candidate):
                    tmp_mode = cfg.get(section, candidate)
                    print 'TEST-POINT:%s.%-12s  : %s'%(section, candidate, tmp_mode)
                    ll = [v for v in dict_methods_modes[tmp_method] if v == tmp_mode]
                    print 'TEST-POINT:%s'%(ll)
                    if not ll:
                        print '%s.%-12s  : %s -> wrong syntax, cleared'%(section, candidate, tmp_mode)
                        cfg.remove_option(section, candidate)
            # Check if candidate exists
            if cfg.has_option(section, candidate):
                continue
            else: # if not set default values for candidate
                print '%s.%-12s  : %s -> missing'%(section, candidate, cfg.has_option(section, candidate))
                if 'method' == candidate:
                    cfg.set(section, candidate, 'rough')
                    print '%s.%-12s  : %s'%(section, candidate, cfg.get(section, candidate))
                elif 'mode' == candidate:
                    cfg.set(section, candidate, 'per_node')
                    print '%s.%-12s  : %s'%(section, candidate, cfg.get(section, candidate))

如果我执行上面的代码，我得到以下打印输出，cfg文件中的参数模式设置为＆＃39; blabla＆＃39;，

cfg文件：

[Settings]
method = rough
mode = blabla
[Run]
test = once

但我得到了：

TEST-POINT:Settings.mode  : per_node
TEST-POINT:['per_node']

由于ll不为空，因此不会删除mode参数以获取下一步的默认值！

另一件事是，如果我注释掉用于检查列表的if语句ll empty：

        #if not ll:
        #    print '%s.%-12s  : %s -> wrong syntax, cleared'%(section, candidate, tmp_mode)
        #    cfg.remove_option(section, candidate)

在这种情况下的打印输出是：

TEST-POINT:Settings.mode  : blabla
TEST-POINT:[]

哪个是正确的，但代码无法删除模式参数！我的代码中我做错了什么？

在python中使用字典列表时出现问题

0 个答案: