爬虫 页面替换的代码 怎么写 代码是p%s报错了
内容是大众点评的露营旅游是
for i in range(11):
N = 15 * i
url_page = 'https://www.dianping.com/search/keyword/2/0_%E5%8C%97%E4%BA%AC%E9%9C%B2%E8%90%A5%E6%97%85%E6%B8%B8/p%s' % (N)
print(url_page)
因为你中间的一些 %E5 之类的东西也被识别为了 format 格式串,所以会报错。
解决方案:
for i in range(11):
N = 15 * i
url_page = r'https://www.dianping.com/search/keyword/2/0_%E5%8C%97%E4%BA%AC%E9%9C%B2%E8%90%A5%E6%97%85%E6%B8%B8/p' + str(N)
print(url_page)
字符串格式化使用操作符 %
来实现, 示例 'my name is %s,my age is %s % ('neo', 18)'
格式符: %s
连接符:格式化字符串与格式符变量之间用一个 % 连接, % 两边各有一个空格
附:当我们字符串中只有一个变量时,不需要使用元组进行包裹;超过一个时,就需要使用元组进行包裹。
示例如下:
info_01 = 'My name is %s , age is %s ' % ('Neo', 19)
print(info_01)
# >>> My name is Neo , age is 19
info_02 = 'My name is %s , age is %s '
name_01 = 'Neo'
age_01 = 18
name_02 = 'Jack'
age_02 = 17
print(info_02 % (name_01, age_01))
print(info_02 % (name_02, age_02))
# >>> My name is Neo , age is 18
# >>> My name is Jack , age is 17