在csv列上循环并获取最大数字

import pandas as pd

def get_max_number_in_csv_column(csv_file, column_name):
    # 读取CSV文件
    df = pd.read_csv(csv_file)
    
    # 获取指定列
    column = df[column_name]
    
    # 初始化最大值变量
    max_number = float('-inf')
    
    # 遍历列并获取最大数字
    for number in column:
        if pd.notnull(number) and isinstance(number, (int, float)):
            max_number = max(max_number, number)
    
    # 返回最大数字
    return max_number