删除底部的空行

def remove_empty_lines_at_end(text):
    lines = text.split('\n')
    while lines and not lines[-1].strip():
        lines.pop()
    return '\n'.join(lines)

text = """Hello, world!

This is an example text with empty lines at the end.

"""

text_without_empty_lines = remove_empty_lines_at_end(text)
print(text_without_empty_lines)

Hello, world!

This is an example text with empty lines at the end.