使用词典:
d = {'1': 'a'}
如何使用Python中的JMESPath库提取值a？
以下try 没有成功:
import jmespath
value = jmespath.search("1", d)
# throws jmespath.exceptions.ParseError: invalid token
value = jmespath.search("'1'", d)
# returns the key '1' instead of the value 'a'
如果标识符是unquoted-string(即A-Za-z0-9_)以及字符串以A-Za-z_开头，则可以直接地址.
From the grammar rule listed above identifiers can be one or more characters, and must start with A-Za-z_.
An identifier can also be quoted. This is necessary when an identifier has characters not specified in theunquoted-stringgrammar rule. In this situation, an identifier is specified with a double quote, followed by any number ofunescaped-charorescaped-charcharacters, followed by a double quote.
Source: JMESPath documentation, 100
由于您的标识符是0-9，因此您必须对此标识符使用双引号字符串，因此为"1".
因此，您的工作Python代码是:
import jmespath
d = {'1': 'a'}
value = jmespath.search('"1"', d)
print(value)