python奇怪的反斜杠问题？

Question

from webbrowser import get
from selenium import webdriver
from time import sleep, time
from selenium.webdriver import ActionChains
from bs4 import BeautifulSoup as Bs4
import csv
f = open('product.csv', mode='a', encoding='utf-8', newline='')
fieldnames = ['store_name', 'store_info', 'price', 'cost', 'image',
              'recommend_image', 'slider_image']
csv_writer = csv.DictWriter(f, fieldnames=fieldnames)
csv_writer.writeheader()

options = webdriver.ChromeOptions()
options.add_experimental_option(
    "excludeSwitches", ['enable-automation', 'enable-logging'])
browser = webdriver.Chrome(
    executable_path='C:/Users/bruce/Desktop/ccc/img/chromedriver_win32/chromedriver.exe', options=options)

def write_csv(url='http://www.alaibao.cn/ProductDetail-83.html'):
    browser.get(url)
    browser.implicitly_wait(10)
    store_name = browser.find_element_by_css_selector('#ProductTitle1').text
    store_info = browser.find_element_by_css_selector('#ProductMainParam').text
    price = browser.find_element_by_css_selector(
        '#hdprice').get_attribute('value')
    cost = float(price) * 0.5
    slider_images = browser.find_elements_by_css_selector(
        '#J_UlThumb li:not(#J_VideoThumb)')
    slider_image = []
    image = ''
    for v in slider_images:
        img = v.find_element_by_css_selector('.tb-pic img')
        print(img.get_attribute('bimg'))
        slider_image.append(img.get_attribute('bimg').replace('/', r'\/'))
    image = slider_image[0].replace(r'\/', '/')
    print(slider_image)
    # .replace('/', '\/')
    item = {'store_name': store_name, 'store_info': store_info, 'price': price, 'cost': cost,
            'image': image, 'recommend_image': image, 'slider_image': slider_image}
    csv_writer.writerow(item)

    browser.quit()

write_csv()

这是完整代码。生成的路径都是
http:\\/\\/

我想要的是
http:\/\/

Answer 1

.replace('/', '\/') 没问题，但不规范，反斜杠在字符串中用于转义特殊字符，反斜杠本身也应转义，所以 '\/' 应改为 '\\/' 或用原始字符串 r'\/'

截图的内容是 python 列表转字符串的结果，里面的字符串是字面量，可以看出 a 字符串本身没问题，所以只要正确写入和读取即可

参考代码

import csv


a = 'http://img1.zabao.cn/pimages'.replace('/', '\/')  # 不规范
b = 'http://img1.zabao.cn/pimages'.replace('/', '\\/')
c = 'http://img1.zabao.cn/pimages'.replace('/', r'\/')
d = 'http:\\/\\/img1.zabao.cn\\/pimages'

data = [
    ['a', a],
    ['b', b],
    ['c', c],
    ['d', d]
]

with open('test.csv', 'w', newline='') as f:
    csv.writer(f).writerows(data)

with open('test.csv', 'r') as f:
    for row in csv.reader(f):
        print(row[0], '=', row[1])

test.csv

a,http:\/\/img1.zabao.cn\/pimages
b,http:\/\/img1.zabao.cn\/pimages
c,http:\/\/img1.zabao.cn\/pimages
d,http:\/\/img1.zabao.cn\/pimages

控制台

a = http:\/\/img1.zabao.cn\/pimages
b = http:\/\/img1.zabao.cn\/pimages
c = http:\/\/img1.zabao.cn\/pimages
d = http:\/\/img1.zabao.cn\/pimages