我需要将json返回到前端，了解数据框的列标题及其数据类型。我试过了：
return {"column header" : header, "filename" : newFilename,
"data": result.head(n= rowsLimit).values.tolist(),
"datatype": result.dtypes.tolist()}
在result.dtypes.tolist()，我收到dtype('int64') is not JSON serializable错误。
由于
答案 0 :(得分：1)
将它们转换为字符串是一种选择：
>>> json.dumps({"datatype": [str(d) for d in result.dtypes.tolist()]})
'{"datatype": ["float64", "float64", "float64", "float64"]}'
或者，您可以使用repr：
>>> json.dumps({"datatype": [repr(d) for d in result.dtypes.tolist()]})
'{"datatype": ["dtype(\'float64\')", "dtype(\'float64\')", "dtype(\'float64\')", "dtype(\'float64\')"]}'
答案 1 :(得分：1)
数据类型具有$(document).ready(function () {
$("#jquery_jplayer_1").jPlayer({
ready: function () {
$(this).jPlayer("setMedia", {
title: "Bubble",
mp3: "http://jplayer.org/audio/mp3/Miaow-07-Bubble.mp3"
});
},
timeupdate: function(event) {
$("#jp_container_1 .jp-ball").css("left",event.jPlayer.status.currentPercentAbsolute + "%");
},
swfPath: "https://rawgit.com/happyworm/jPlayer/tree/master/dist/jplayer",
supplied: "mp3",
wmode: "window",
useStateClassSkin: true,
autoBlur: false,
smoothPlayBar: true,
keyEnabled: true,
remainingDuration: true,
toggleDuration: true
});
/* Modern Seeking */
var timeDrag = false; /* Drag status */
$('.jp-play-bar').mousedown(function (e) {
timeDrag = true;
updatebar(e.pageX);
});
$(document).mouseup(function (e) {
if (timeDrag) {
timeDrag = false;
updatebar(e.pageX);
}
});
$(document).mousemove(function (e) {
if (timeDrag) {
updatebar(e.pageX);
}
});
//update Progress Bar control
var updatebar = function (x) {
var progress = $('.jp-progress');
var maxduration = $("#jquery_jplayer_1").jPlayer.duration; //audio duration
console.log(maxduration);
var position = x - progress.offset().left; //Click pos
var percentage = 100 * position / progress.width();
//Check within range
if (percentage > 100) {
percentage = 100;
}
if (percentage < 0) {
percentage = 0;
}
$("#jquery_jplayer_1").jPlayer("playHead", percentage);
//Update progress bar and video currenttime
$('.jp-ball').css('left', percentage+'%');
$('.jp-play-bar').css('width', percentage + '%');
$("#jquery_jplayer_1").jPlayer.currentTime = maxduration * percentage / 100;
};
});
属性，可用于返回字符串：
name