如何将DataFrame数据写入csv文件及读取

import csv
 
def saveData(filePath, data):
 
    with open(filePath, 'w+', newline='') as f:
        writer = csv.writer(f)
        for row in data:
            writer.writerow(row)

init_configs = []
for i, cluster in enumerate(clusters):
    init_configs.append([f"cluster {i}:"])
    for _, row in cluster.iterrows():
        config = row.tolist()
        init_configs.append(config)
 
saveData('filePath', init_configs)

init_configs = []
for i, cluster in enumerate(clusters):
    init_configs.append([f"cluster {i}:"])
    for _, row in cluster.iterrows():
        config = row.tolist()
        init_configs.append([config])
 
saveData('filePath', init_configs)

import pandas as pd
 
with open(filePath, 'r') as f:
    lines = f.readlines()
 
filtered_lines = [line for line in lines if not line.startswith('cluster')]
 
configs = []
for line in filtered_lines:
    config = [int(x) for x in line.strip().split(',')]
    configs.append(config)
 
df = pd.DataFrame(configs)

import pandas as pd
import ast
 
with open(filePath, 'r') as f:
    lines = f.readlines()
 
filtered_lines = [line for line in lines if not line.startswith('cluster')]
 
configs = []
for line in filtered_lines:
    config = ast.literal_eval(eval(line))
    configs.append(config)
 
df = pd.DataFrame(configs)