如何使用 Python 编辑带有制表符和大括号的复杂配置文件？

Question

我有一个如下所示的配置文件：

#  EAP types NOT listed here may be supported via the "eap2" module.
#  See experimental.conf for documentation.
#
        eap {
                #  Invoke the default supported EAP type when
                #  EAP-Identity response is received.
                #
                #  The incoming EAP messages DO NOT specify which EAP
                #  type they will be using, so it MUST be set here.
                #
                #  For now, only one default EAP type may be used at a time.
                #
                #  If the EAP-Type attribute is set by another module,
                #  then that EAP type takes precedence over the
                #  default type configured here.
                #
                default_eap_type = peap

                #  A list is maintained to correlate EAP-Response
                #  packets with EAP-Request packets.  After a
                #  configurable length of time, entries in the list
                #  expire, and are deleted.
                #

我希望能够编辑eap结构下default_eap_type选项的值。我不能简单地做一个子字符串，因为 default_eap_type 再次出现在配置文件的另一个位置，但在不同的结构下。使用 Python 更改值的最佳方法是什么？

Answer 1

如果您没有以下格式的解析器，则类似这样：

output_lines = []
is_eap = False
for line in file:
    if line.strip().startswith('eap {'):
        is_eap = True
    elif line.strip().split()[1] == '{':
        is_eap = False
    if is_eap:
        output_lines.append(process_line(line))
    else:
        output_lines.append(line)

这非常粗糙，但希望对您有所帮助。

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