将列表中的所有字符串转换为浮点型。适用于单个列表，但不适用于数据帧

def convert_strings_to_floats(input_list):
    try:
        return [float(item) for item in input_list]
    except ValueError as e:
        print(f"Error converting to float: {e}")
        return None

# 示例列表
example_list = ['1.1', '2.2', '3.3']

# 转换为浮点型
float_list = convert_strings_to_floats(example_list)
print(float_list)  # 输出: [1.1, 2.2, 3.3]

def convert_strings_to_floats(input_list):
    try:
        return [float(item) for item in input_list]
    except ValueError as e:
        print(f"Error converting to float: {e}")
        return None

import pandas as pd

# 示例数据帧
df = pd.DataFrame({'A': ['1.1', '2.2', '3.3']})

# 转换为浮点型
df['A'] = df['A'].astype(float)
print(df)