Handle keys with numbers

[mapi33]

Taking the following json, defiant.search(json, "//percents/15") returns
Evaluation failed: DOMException: Failed to execute 'evaluate' on 'Document': The string '//percents//15' is not a valid XPath expression.

defiant.search(json, "//percents/*[@name='15']) returns {}

 {
        "volume": "1109718.9267420967",
        "percents": {
          "1": {
            "buy_pressure": 154084.47,
            "sell_pressure": 20663.32,
            "books_24_hours_avg": 441286.47219814226
          },
          "2": {
            "buy_pressure": 299911.21,
            "sell_pressure": 299872.79,
            "books_24_hours_avg": 836768.6396904029
          },
          "5": {
            "buy_pressure": 403699.71,
            "sell_pressure": 780519.51,
            "books_24_hours_avg": 955530.720696594
          },
          "10": {
            "buy_pressure": 403699.71,
            "sell_pressure": 780519.51,
            "books_24_hours_avg": 955747.7552476776
          },
          "15": {
            "buy_pressure": 403699.71,
            "sell_pressure": 780519.51,
            "books_24_hours_avg": 955747.7552476776
          }
        },
        "buy_pressure": "403699.71",
        "markets_count": 1,
        "sell_pressure": "780519.51",
        "books_24_hours_avg": 955747.7552476776
},

[nicohell]

Same issue :

defiant.search(search, '//2020-05-05[setStart]');

Failed to execute 'evaluate' on 'Document': The string '//2020-05-05[setStart]' is not a valid XPath expression.

{"search": { "2020-05-05": { "period": "weekly", "setStart": "2020-05-01" }, "2020-05-06": { "period": "daily", "setStart": "2020-05-01" } } }

Also tried without Hyphens :

Failed to execute 'evaluate' on 'Document': The string '//2020[setStart]' is not a valid XPath