读取多个json文件并生成dataframe时出现问题

import os
import pandas as pd

file_paths = ['path/to/file1.json', 'path/to/file2.json']
dataframes = []

for file_path in file_paths:
    if os.path.exists(file_path):
        df = pd.read_json(file_path)
        dataframes.append(df)
    else:
        print(f"File not found: {file_path}")

combined_df = pd.concat(dataframes, ignore_index=True)

import pandas as pd

file_paths = ['path/to/file1.json', 'path/to/file2.json']
dataframes = []

for file_path in file_paths:
    df = pd.read_json(file_path)
    # 统一列名
    df.columns = [col.lower() for col in df.columns]
    dataframes.append(df)

combined_df = pd.concat(dataframes, ignore_index=True)

import pandas as pd
import dask.dataframe as dd

file_paths = ['path/to/file1.json', 'path/to/file2.json']
dataframes = []

for file_path in file_paths:
    df = dd.read_json(file_path)
    dataframes.append(df)

combined_df = dd.concat(dataframes, interleave_partitions=True)
final_df = combined_df.compute()