我正在尝试安装“libxml2”和“libxslt”,以便在mac上使用scrapy(使用python进行网页抓取)。
我有自制软件,我跑了
library(dplyr)
dat %>% group_by(col1) %>%
mutate(col3 = (sum(col2) - col2)/(n()-1))
Source: local data frame [6 x 3]
Groups: col1 [2]
col1 col2 col3
(int) (int) (dbl)
1 1 1 2.5
2 1 2 2.0
3 1 3 1.5
4 2 4 5.5
5 2 5 5.0
6 2 6 4.5
我收到此消息
$ brew install libxml2 libxslt
当我尝试安装scrapy时,使用
OS X already provides this software and installing another version in parallel can cause all kinds of trouble.
我收到此错误:
$ pip install scrapy
当我尝试
Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?
Perhaps try: xcode-select --install
我得到一个无效的参数错误。
有什么建议吗?
答案 0 :(得分:9)
您应该运行$('.second-block').find(".carousel").attr("id", "carousel2");
$('.second-block').find('.carousel-control').attr("href", "#carousel2");
$('.third-block').find(".carousel").attr("id", "carousel3");
$('.third-block').find('.carousel-control').attr("href", "#carousel3");
。这将安装包含libxml2的XCode命令行工具。