在字典中列出，在Python中循环 [英] List in a dictionary, looping in Python

问题描述

我有以下代码:

    TYPES = {'hotmail':{'type':'hotmail', 'lookup':'mixed', 'dkim': 'no', 'signatures':['|S|Return-Path: [e-mail]','|R|^Return-Path:\s*[^@]+@(?:hot|msn)','^Received: from .*hotmail.com$']},
             'gmail':{'type':'gmail', 'lookup':'mixed', 'dkim': 'yes', 'signatures':['|S|Subject: unsubscribe','','','']}
            }

    for type_key, type in TYPES.iteritems():
        for sub_type_key, sub_type in type.iteritems():
            for sig in sub_type['signatures']:
                if ("|S|" in sig):
                    #String based matching
                    clean_sig = sig[3:len(sig)]
                    if (clean_sig in file_contents):
                        sig_match += 1
                elif ("|R|" in sig):
                    clean_sig = sig[3:len(sig)]
                    #REGMATCH later
            if (sig_match == sig.count):
                return sub_type['type']

     return None

但是，它会产生错误:

for sig in sub_type['signatures']:
TypeError: string indices must be integers, not str

我认为它将看到列表从字典元素中拉出，并允许我在其上循环播放?

I assume that it would see the list being pulled from dictionary element, and allow me to loop over that?

Python新手是新手:(

Python newbie is a newbie :(

推荐答案

for type_key, type in TYPES.iteritems():
    for sub_type_key, sub_type in type.iteritems():
        for sig in sub_type['signatures']:

应为:

for type_key, type in TYPES.iteritems():
        for sig in type['signatures']:

但是在这种情况下，'type'是一个糟糕的名字选择……您不想隐藏内置函数.

But 'type' is a poor name choice in this case... you don't want to shadow a builtin.

本质上，"type_key"具有名称("hotmail"或"gmail")，而"type"具有字典，即与该键关联的值.因此，您需要的是type ['signatures'].

Essentially, 'type_key' has the name (either 'hotmail' or 'gmail'), and 'type' has the dictionary that is the value associated with that key. So type['signatures'] is what you're wanting.

此外，您可能不需要在嵌套字典中添加"gmail"；只需返回'type_key'而不是type['type'].

Also, you may not need to have 'gmail' inside the nested dictionary; just return 'type_key' instead of type['type'].

综合考虑，也许会更好:(警告:未经测试)

Bringing it all together, maybe this will work better: (Warning: untested)

providers = {
    'hotmail':{
        'type':'hotmail',
        'lookup':'mixed',
        'dkim': 'no',
        'signatures':[
            '|S|Return-Path: [e-mail]',
            '|R|^Return-Path:\s*[^@]+@(?:hot|msn)',
            '^Received: from .*hotmail.com$']
    },
    'gmail':{
        'type':'gmail',
        'lookup':'mixed',
        'dkim': 'yes',
        'signatures':['|S|Subject: unsubscribe','','','']
    }
}

for provider, provider_info in providers.iteritems():
    for sig in provicer_info['signatures']:
        if ("|S|" in sig):
            #String based matching
            clean_sig = sig[3:len(sig)]
            if (clean_sig in file_contents):
                sig_match += 1
        elif ("|R|" in sig):
            clean_sig = sig[3:len(sig)]
            #REGMATCH later
    if (sig_match == sig.count):
        return provider

 return None

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