Bootstrap Accordion的前两个窗格在页面加载时打开，即使代码显示已折叠

Question

这是代码

from pyspark.sql import SparkSession    
from pyspark.sql.types import *
from pyspark.sql.functions import *
from pyspark.sql.window import Window


spark = SparkSession \
    .builder \
    .appName('test') \
    .getOrCreate()


tab_data = spark.sparkContext.parallelize(tab_inp)
##
schema = StructType([StructField('id',IntegerType(),True),
                     StructField('value1',FloatType(),True),
                     StructField('value2',IntegerType(),True),
                     StructField('flag',IntegerType(),True)
                    ])

table = spark.createDataFrame(tab_data,schema)
table.createOrReplaceTempView("table")
dummy_df=table.withColumn('dummy',lit('dummy'))
pre_value=dummy_df.withColumn('pre_value',lag(dummy_df['value2']).over(Window.partitionBy('dummy').orderBy('dummy')))

cmb_value=pre_value.withColumn('next_value',lead(dummy_df['value2']).over(Window.partitionBy('dummy').orderBy('dummy')))

new_column=when(col('value1')>0,cmb_value.pre_value) \
            .when(col('value1')<0,cmb_value.next_value)\
            .otherwise((cmb_value.pre_value+cmb_value.next_value)/2)


final_table=cmb_value.withColumn('value',new_column)

您可以看到class =“ panel-collapse crash”中没有“ in”，并且面板标题显示“ collapsed”。

这在网站的其他页面上正常工作

  <div class="panel panel-default">
  <div class="panel-heading" role="tab" id="headingOne">
  <h5 class="panel-title"><a class="accordionTitleBar collapsed" role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseOne" aria-expanded="true" aria- controls="collapseOne" target="blank" onclick="return false;">Technical Committee</a>
  </h5>
  </div>
  <div id="collapseOne" class="panel-collapse collapse" role="tabpanel" aria-labelledby="headingOne" style="height: auto;">
  <div class="panel-body">
    //text goes here
  <div style="clear: both;">&nbsp;</div>
  </div>
  </div>
  </div>

这些代码完全相同，那么为什么第一个页面加载时不折叠？