import pandas as pd
df =pd.read_csv('bus_road_sequence.csv',header=None)
import numpy as np

# 假设 'df' 是你的 DataFrame
# 将非数字元素替换为 NaN
df = df.applymap(lambda x: x if isinstance(x, (int, float)) else 0)



df.to_csv('bus_road_sequence.csv',index=False)