Question

我正在尝试找出如何将以下列表导出到.csv文件中，并与某些列匹配的情况。

[{'amount': '100', 'unit': 'g.', 'ingredient': 'mælkechokolade'}, {'amount': '20', 'unit': 'g.', 'ingredient': 'mini marshmallows'}, {'amount': '40', 'unit': 'g.', 'ingredient': 'saltede peanuts'}]

以上是通过字符串解析并使用正则表达式将内容与其正确的标头匹配的结果。

r = re.compile(r"(?P<amount>\d+)\s+(?P<unit>\w+.)\s+(?P<ingredient>.+?(?=<))") print([m.groupdict() for m in r.finditer(s)])

是否可以使用.writerow正确导出该列表？到目前为止，我无法使其正常工作。

Answer 1

您可以使用pandas.to_csv来获取数据结构并将其写入csv：

{{ item["h_" + String(hour).padStart(2, '0')] }}

尽管需要import pandas as pd somedata = [{'amount': '100', 'unit': 'g.', 'ingredient': 'mælkechokolade'}, {'amount': '20', 'unit': 'g.', 'ingredient': 'mini marshmallows'}, {'amount': '40', 'unit': 'g.', 'ingredient': 'saltede peanuts'}] df = pd.DataFrame(somedata) with open("somefile.csv", 'w') as fh: df.to_csv(fh)点安装（pandas）。否则，您可以只使用内置的csv模块：

pip install pandas

将会导致

import csv

somedata = [{'amount': '100', 'unit': 'g.', 'ingredient': 'mælkechokolade'}, {'amount': '20', 'unit': 'g.', 'ingredient': 'mini marshmallows'}, {'amount': '40', 'unit': 'g.', 'ingredient': 'saltede peanuts'}]

# This will keep order consistent
headers = [k for k in somedata[0].keys())
new_data = [[rec.get(header) for header in headers] for rec in somedata]

with open('somefile.csv', 'w') as fh:
    writer = csv.writer(fh, delimiter=',')
    writer.writerow(headers)
    for row in new_data:
        writer.writerow(row)

Answer 2

您可以使用pandas DataFrame的to_csv函数

function animateVector3(vectorToAnimate, target, options) {
    options = options || {}
    // get targets from options or set to defaults
    let to = target || new THREE.Vector3(),
        easing = options.easing || TWEEN.Easing.Exponential.InOut,
        duration = options.duration || 2000
    // create the tween
    let tweenVector3 = new TWEEN.Tween(vectorToAnimate)
        .to({x: to.x, y: to.y, z: to.z}, duration)
        .easing(easing)
        .onStart(function(d) {
            if (options.start) {
                options.start(d)
            }
        })
        .onUpdate(function(d) {
            if (options.update) {
                options.update(d)
            }
        })
        .onComplete(function() {
            if (options.finish) options.finish()
        })
    // start the tween
    tweenVector3.start()
    // return the tween in case we want to manipulate it later on
    return tweenVector3
}

const animationOptions = {    
    duration: 2000,
    start: () => {
        this.cameraControls.enable(false)
    },
    finish: () => {
        this.cameraControls.enable(true)
    }
}
// Adjust Yaw object rotation
animateVector3(
// current rotation of the 3d object
    yawObject.rotation,
// desired rotation of the object
    new THREE.Vector3(0, 0, annotation.rotation.z + degToRad(90)),
    animationOptions
)
// Adjust Pitch object rotation
animateVector3(
    pitchObject.rotation,
    new THREE.Vector3(0, degToRad(45), 0),
    animationOptions
)

如何将列表导出到csv文件的不同列中？

2 个答案: