Format()引发 KeyError

下面的代码引发 KeyError异常:

addr_list_formatted = []
addr_list_idx = 0


for addr in addr_list: # addr_list is a list
addr_list_idx = addr_list_idx + 1
addr_list_formatted.append("""
"{0}"
{
"gamedir"  "str"
"address"  "{1}"
}
""".format(addr_list_idx, addr))

为什么？

我正在使用 Python 3.1。

python
syntax
string-formatting
delimiter
missing-data

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最佳答案

The problem is that those { and } characters you have there don't specify a key for formatting. You need to double them up, so change your code to:

addr_list_formatted.append("""
"{0}"
\{\{
"gamedir"  "str"
"address"  "{1}"
}}
""".format(addr_list_idx, addr))