将字段RLC Throughput DL为NaN替换为0df['RLC Throughput DL'].fillna(0, inplace=True)碰到NaN值用上一行的值替换
df.fillna(method='ffill', inplace=True)
碰到NaN值用下一行的值替换
df.fillna(method='bfill', inplace=True)