如果符合条件，则更新EmbeddedDocumentListField中的所有EmbeddedDocuments

# 导入必要的库和模块
from mongoengine import Document, EmbeddedDocument, StringField, ListField

# 定义嵌套文档类
class EmbeddedDocumentExample(EmbeddedDocument):
    field1 = StringField()
    field2 = StringField()

# 定义包含EmbeddedDocumentListField的文档类
class DocumentExample(Document):
    embedded_documents = ListField(EmbeddedDocumentField(EmbeddedDocumentExample))

# 获取文档对象
document = DocumentExample.objects.first()

# 确定要更新的EmbeddedDocumentListField的名称
field_name = "embedded_documents"

# 遍历EmbeddedDocumentListField中的每个EmbeddedDocument
for embedded_document in getattr(document, field_name):
    # 更新每个EmbeddedDocument的字段值
    embedded_document.field1 = "New Value 1"
    embedded_document.field2 = "New Value 2"

# 保存更新后的文档对象
document.save()