將昨天用到的台北市各區未來兩天的溫度，顯示在表格吧。
首先我會先整理資料，把需要的資料存成新的List，之後畫表格的時候會比較單純。

程式碼，只留各區的溫度。

authorization = "xx"
url = "https://opendata.cwb.gov.tw/api/v1/rest/datastore/F-D0047-061"
res = requests.get(url, {"Authorization": authorization})
resJson = res.json()

dataDictList = []
locations = resJson["records"]["locations"][0]["location"]
for location in locations:
    temperatureDictList = []
    weatherElements = location["weatherElement"]
    for weatherElement in weatherElements:
        if weatherElement["elementName"] == "T":
            timeDicts = weatherElement["time"]
            for timeDict in timeDicts:
                temperatureDictList.append({
                    "dataTime": timeDict["dataTime"],
                    "value": timeDict["elementValue"][0]["value"],
                })
    tempDict = {
        "locationName": location["locationName"],
        "temperatureDictList": temperatureDictList
    }
    dataDictList.append(tempDict)

再來寫一個func 去抓明後天的資料，因為資料會含今天的，所以要用判斷日期，預期顯示結果是，第一排顯示各區名稱，由左至右，最左邊一行是時間，有 00, 03, 06, 09, 12, 15, 18, 21，每三個小時，這邊就全部顯示了，有點多就是了。

def getPDFTableDay(dataDictList, showDateText):
    tableStyle = TableStyle([
        ('ALIGN', (0, 0), (-1, -1), 'CENTER'),
        ('FONTNAME', (0, 0), (-1, -1), 'kaiu'),
        ('VALIGN', (0, 0), (-1, -1), 'MIDDLE'),
        ('GRID', (0, 0), (-1, -1), 0.5, colors.black),
    ])
    headerList = [showDateText]
    bodyList = [
        ["00:00"], ["03:00"], ["06:00"], ["09:00"],
        ["12:00"], ["15:00"], ["18:00"], ["21:00"]
    ]
    for dataDict in dataDictList:
        headerList.append(dataDict["locationName"])
        for temperatureDict in dataDict["temperatureDictList"]:
            dataTime = temperatureDict["dataTime"]
            if showDateText in dataTime:
                hour = int(dataTime.split(" ")[1].split(":")[0])
                bodyIndex = int(hour / 3)
                bodyList[bodyIndex].append(
                    Paragraph(temperatureDict["value"], style=styleNormalCustom)
                )

    tableDataList = [
        headerList,
        *bodyList,
    ]
    table = Table(tableDataList, style=tableStyle)
    return table

styles = getSampleStyleSheet()

styleNormalCustom = ParagraphStyle(
    'styleNormalCustom',
    fontName='kaiu',
    parent=styles["Normal"],
    alignment=TA_CENTER,
)

pdfmetrics.registerFont(TTFont('kaiu', "font/kaiu.ttf"))
fileName = "example.pdf"
pdfTemplate = SimpleDocTemplate(fileName)
story = []
# 抓今天日期，去推 明天 及後天的日期
today = datetime.datetime.today().date()
showDate = today + datetime.timedelta(days=1)

todayDate = datetime.datetime.today().date()
tomorrow = todayDate + datetime.timedelta(days=1)
dayAfterTomorrow = tomorrow + datetime.timedelta(days=1)
tomorrowText = tomorrow.strftime('%Y-%m-%d')
dayAfterTomorrowText = dayAfterTomorrow.strftime('%Y-%m-%d')
# 畫明天的表格
table = getPDFTableDay(dataDictList, tomorrowText)
story.append(table)
story.append(Spacer(1, 0.3 * inch))
# 畫後天的表格
table = getPDFTableDay(dataDictList, dayAfterTomorrowText)
story.append(table)

pdfTemplate.build(story)

結果圖，就可以看到明天27號比較冷，連中午都還在22度左右
後天28號，中午還有24、25度左右

結語

程式應該可以寫得更好，或做好一點的處理及顯示。

參考資料:

• ReportLab 說明文件

如果有任何寫得不好的地方，請跟我說，謝謝。