如何在熊猫数据框中使用不同的颜色为布尔值着色

Question

Customer_id   Name    Age  Balance
        Q1   True   True     True
        W2   True   True     True
        E3   True  False     True
        T5   True   True    False
        Y6   True   True     True
        U7   True   True     True
        I8  False  False    False
        O9   True  False    False
        P0  False  False    False

我想在上述数据框中以黄色突出显示或用黄色填充单词'TRUE'

这是我尝试的代码：

def color_negative_red(val):
    color = 'yellow' if val == 'TRUE' else 'black'
    return 'color: %s' % color
df = dataframe.style.\
       apply(color_negative_red).\
       to_excel('df.xlsx')

我收到以下错误

ValueError: ('The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().', 'occurred at index Customer_id')

我在这里做什么错了？

Answer 1

使用Styler.applymap代替apply：

dataframe.style.\
       applymap(color_negative_red).\
       to_excel('df.xlsx')

如果是布尔值，也可以用True进行比较，如果是字符串，还可以用'True'进行比较：

def color_negative_red(val):
    color = 'yellow' if val == True else 'black'
    return 'color: %s' % color

#python 3.6+ with f-strings
def color_negative_red(val):
    color = 'yellow' if val == True else 'black'
    return f'color: {color}'

#python bellow 3.6
def color_negative_red(val):
    color = 'yellow' if val == True else 'black'
    return 'color: {}'.format(color)

如果还要删除索引值：

dataframe.style.\
       applymap(color_negative_red).\
       to_excel('df.xlsx', index=False)

Answer 2

尝试一下（这里可以使用<?php require("phpMQTT.php"); $server = "xx.xx.xx.xx"; $port = 1883; $username = "username"; $password = "password"; $client_id = uniqid(); $mqtt = new phpMQTT($server, $port, $client_id); //Read message from form, which type of sensor to read $msg = $_POST['sensor']; if (!empty($msg)) { if ($mqtt->connect(true, null, $username, $password)) { //Publish type of sensor to read $mqtt->publish("dev/sensors", $msg , 0); $mqtt->close(); } //Start listen for response subscribeToTopic($mqtt); } function subscribeToTopic($mqtt) { //Set topic to listen to $topics['dev/sensors'] = array("qos" => 0, "function" => "procmsg"); $mqtt->subscribe($topics, 0); //Listen for the response in the subscribed topic while ($mqtt->proc()) { } $mqtt->close(); } function procmsg($topic, $msg) { global $mqtt; echo $msg; //Close mqtt-connection after message is received $mqtt->close(); } ?> ）：

apply