尝试打印哈希时获取错误“不是ARRAY引用”。不知道我哪里错了。有没有办法以这样的方式打印解码的json，这样可以更容易地识别哈希元素？
use JSON qw( decode_json );
my $owm_json= <<'__EOI__';
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__EOI__
my $decoded = decode_json($owm_json);
print $decoded->{list}[0]->{weather}[0]->{description};
答案 0 :(得分：4)
您的字符串$owm_json不是有效的Perl字符串。从短片段：
"{"cod":"200","city":{"id":"4270936","name":
这应该是：
"{\"cod\":\"200\",\"city\":{\"id\":\"4270936\",\"name\":
您需要转义内部引号。尝试将use strict放在脚本的开头，应该已经发现了这个错误。
从评论中更新：
查看您的JSON数据，您对descpiption字段的访问权限不正确。以下是您尝试在示例中显示的部分：
"list" : {
"0" : {
"weather" : [{
"id" : 803,
"main" : "Clouds",
"description" : "broken clouds",
"icon" : "04n"
}
],
请注意，在“list”之后你有“0”，而不是使用[]个字符的数组引用。在您的脚本中，在{list}使用{0}而不是[0]后，这应该可以解决您的问题：
print $decoded->{list}{0}{weather}[0]{description};
答案 1 :(得分：2)
list的值是一个哈希值（...,"list":{"0":{...},...），但您尝试取消引用的是->[0]，这是一个数组解除引用。
你想：
$decoded->{list}{0}{weather}[0]{description}
而不是
$decoded->{list}[0]{weather}[0]{description}