小编Kam*_*ski的帖子

当我跑步时，R我得到：

dyld: Library not loaded: /usr/local/opt/openblas/lib/libopenblasp-r0.2.20.dylib
  Referenced from: /usr/local/Cellar/r/3.5.0_1/lib/libR.dylib
  Reason: image not found
Abort trap: 6

确实文件不存在：

ls /usr/local/opt/openblas/lib/libopenblasp-r0.2.20.dylib
ls: cannot access '/usr/local/opt/openblas/lib/libopenblasp-r0.2.20.dylib': No such file or directory

我在macOS 10.13.3上并使用自制软件安装R，如下所示：

# Java
brew cask install java

# OpenBLAS (installs gcc and other dependencies)
brew install openblas

# R language for statistical computing
brew install r --with-openblas --with-java

# Install XQuartz, needed for R package "Cairo"
brew cask install xquartz

# Needed for R package "RMySQL"
brew …

为超级新手问题提前道歉.

我正在学习使用pandas,并且有这个简单的操作,我无法弄清楚如何执行:

我有以下数据框:

print df 
Out[19]: 
USERNAME  REQUEST_TYPE   STATUS  LATENCY
0      foo             1  SUCCESS        7
1      foo             2  SUCCESS       17
2      bar             1  SUCCESS       10
3      bar             2  FAILURE       12

我希望每个USERNAME都有一行,这是每个REQUEST_TYPE的STATUS和LATENCY列的串联.输出应如下所示:

USERNAME    STATUS_1  LATENCY_1     STATUS_2    LATENCY_2
0      foo  SUCCESS     7           SUCCESS        17
1      bar  SUCCESS     10          FAILURE        12

我想到了以pandas.groupby(df,['USERNAME','REQUEST_TYPE'])开头的东西,但我不知道如何连接回来的行,以及是否有任何方法可以创建新的列名.

谢谢!