使用pip安装spacy时出现错误（在mac python3下）。以下是错误报告的最后一部分。似乎有很多错误。我该如何解决？我已经安装了gcc。
gcc: warning: x86_64 conflicts with i386 (arch flags ignored)
cc1plus: warning: command line option '-Wno-strict-prototypes' is valid for C/ObjC but not for C++
g++-4.2 -bundle -undefined dynamic_lookup -arch i386 -arch x86_64 -g build/temp.macosx-10.6-intel-3.6/thinc/linalg.o -o build/lib.macosx-10.6-intel-3.6/thinc/linalg.cpython-36m-darwin.so
unable to execute 'g++-4.2': No such file or directory
error: command 'g++-4.2' failed with exit status 1
.......
/usr/local/bin/gcc -fno-strict-aliasing -Wsign-compare -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch i386 -arch x86_64 -g -I/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m -I/private/var/folders/md/8kgtqqz12j94hbcvhqz0w7gw0000gp/T/pip-build-sm84mnwa/murmurhash/murmurhash/include -I/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m -c murmurhash/mrmr.cpp -o build/temp.macosx-10.6-intel-3.6/murmurhash/mrmr.o -O3 -Wno-strict-prototypes …导入 rpy2.robjects 时，出现以下错误。它说我必须设置 R_HOME 环境变量或将 R 解释器的目录添加到 PATH。但我不知道如何处理它。你如何解决它？我该怎么办？
问题只出现在 idle 中，而不出现在 bash、sublime、pycharm 或 notebook 中！
PS：我有R(3.4)和rpy2(2.8.6)，mac下导入rpy2没有报错
PSS：我试过 PATH="/Library/Frameworks/R.framework/Versions/3.4/Resources/bin:{PATH}" export PATH. 但我失败了。
>>> import rpy2.robjects as robjects
回溯（最近一次调用）：文件“”，第 1 行，在 import rpy2.robjects as robjects 文件“/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/rpy2/robjects /初始化的.py”，第16行，在进口rpy2.rinterface为rinterface文件“/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/rpy2/rinterface/初始化的.py”第 81 行，在 """) 运行时错误：无法确定 R 主目录。
Try to install R <https://www.r-project.org/>,
set the R_HOME environment variable to the R home directory, or
add the directory of the R interpreter to the PATH environment variable.