用python网络爬虫写一份程序，实现抓取招商银行外汇网站：http://fx.cmbchina.com/提取外汇数据，数据输出（数据包含：现汇卖出价，现钞卖出价，现汇买入价，现钞买入价）使用反爬虫技术，并将抓取的数据显示到IU界面中）

好的，这是一个比较复杂的任务，我们需要使用 requests、BeautifulSoup、re 和 tkinter 这些库来实现。以下是代码实现：

import requests
from bs4 import BeautifulSoup
import re
import tkinter as tk

# 反爬虫技术：设置请求头
headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}

# 发送请求并获取页面内容
def get_html(url):
    try:
        r = requests.get(url, headers=headers)
        r.raise_for_status()
        r.encoding = r.apparent_encoding
        return r.text
    except:
        return ""

# 解析页面内容并提取所需数据
def get_data(html):
    soup = BeautifulSoup(html, "html.parser")
    pattern = re.compile(r'\d+\.\d+')
    data = {}
    tags = soup('td')
    for tag in tags:
        if 'class' in tag.attrs and 'fxsightCur' in tag.attrs['class']:
            if 'USD' in tag.attrs['class']:
                data['USD'] = pattern.findall(tag.string)
            elif 'JPY' in tag.attrs['class']:
                data['JPY'] = pattern.findall(tag.string)
            elif 'EUR' in tag.attrs['class']:
                data['EUR'] = pattern.findall(tag.string)
            elif 'GBP' in tag.attrs['class']:
                data['GBP'] = pattern.findall(tag.string)
            elif 'HKD' in tag.attrs['class']:
                data['HKD'] = pattern.findall(tag.string)
            elif 'CAD' in tag.attrs['class']:
                data['CAD'] = pattern.findall(tag.string)
            elif 'AUD' in tag.attrs['class']:
                data['AUD'] = pattern.findall(tag.string)
            elif 'SGD' in tag.attrs['class']:
                data['SGD'] = pattern.findall(tag.string)
    return data

# 构建 GUI 界面
def show_data():
    url = 'http://fx.cmbchina.com/'
    html = get_html(url)
    data = get_data(html)
    window = tk.Tk()
    window.title('招商银行外汇数据')
    window.geometry('450x300')
    tk.Label(window, text='货币种类').grid(row=0, column=0)
    tk.Label(window, text='现汇卖出价').grid(row=0, column=1)
    tk.Label(window, text='现钞卖出价').grid(row=0, column=2)
    tk.Label(window, text='现汇买入价').grid(row=0, column=3)
    tk.Label(window, text='现钞买入价').grid(row=0, column=4)
    row = 1
    for key in data:
        col = 0
        tk.Label(window, text=key).grid(row=row, column=col)
        for val in data[key]:
            col += 1
            tk.Label(window, text=val).grid(row=row, column=col)
        row += 1
    window.mainloop()

# 运行程序
if __name__ == '__main__':
    show_data()

运行程序后，会弹出一个 GUI 界面，显示当前的外汇数据。