使用Tex无法使用Python构建

Question

我已经通过

安装了LaTex

pip install latex

并从此处运行Mactex安装程序：https://tug.org/mactex/mactex-download.html

但是当我尝试使用Python通过Python构建时，我收到此错误消息：

Traceback (most recent call last):
  File "write_case_insert_from_json.py", line 341, in <module>
    output_pdf_filename)
  File "trace_case_insert.py", line 245, in compile_tex_into_pdf
    pdf = latex.build_pdf(open(tex_filename))
  File "/Library/Python/2.7/site-packages/latex/build.py", line 234, in build_pdf
    raise RuntimeError('No available builder could be instantiated. '
RuntimeError: No available builder could be instantiated. Please make sure LaTeX is installed.

为什么Python找不到tex？我做错了什么？提前谢谢！