如果您的主要目标是做数学运算，那么SymPy提供了一种很好的方法来实现看起来很棒的函数乳胶表达式。

这是当您想要控制文档序言时的另一种解决方案。编写整个文档，将其发送到system latex，将pdf转换为png，使用IPython。显示加载和显示。

import tempfile
import os.path
import subprocess
from IPython.display import Image, display

with tempfile.TemporaryDirectory(prefix="texinpy_") as tmpdir:
    path = os.path.join(tmpdir, "document.tex")
    with open(path, 'w') as fp:
        fp.write(r"""
        \documentclass[12pt]{standalone}
        \begin{document}
        \LaTeX{}
        \end{document}
        """)
    subprocess.run(["lualatex", path], cwd=tmpdir)
    subprocess.run(["pdftocairo", "-singlefile", "-transp", "-r", "100", "-png", "document.pdf", "document"], cwd=tmpdir)
    im = Image(filename=os.path.join(tmpdir, "document.png"))
    display(im)

如果您的主要目标是做数学运算，那么SymPy提供了一种很好的方法来实现看起来很棒的函数乳胶表达式。

Since, I was not able to use all the latex commands in Code even after using the %%latex keyword or the $..$ limiter, I installed the nbextensions through which I could use the latex commands in Markdown. After following the instructions here: https://github.com/ipython-contrib/IPython-notebook-extensions/blob/master/README.md and then restarting the Jupyter and then localhost:8888/nbextensions and then activating "Latex Environment for Jupyter", I could run many Latex commands. Examples are here: https://rawgit.com/jfbercher/latex_envs/master/doc/latex_env_doc.html

\section{First section}
\textbf{Hello}
$
\begin{equation} 
c = \sqrt{a^2 + b^2}
\end{equation}
$
\begin{itemize}
\item First item
\item Second item
\end{itemize}
\textbf{World}

如你所见，我仍然无法使用uspackage。但也许将来会有所改进。

如果希望从笔记本代码单元中显示LaTeX方程，可以创建一个简单的包装器类，利用Jupyter笔记本丰富的显示表示。这个类应该有一个_repr_latex_方法(注意在开始和结束处有一个下划线，而不是其他特殊方法的双下划线)来输出LaTeX字符串。例如:

class LaTeXEquation:
    def __init__(self, eqntext):
        self.eqntext = eqntext

    def __repr__(self):
        return repr(self.eqntext)

    def _repr_latex_(self):
        """
        Special method for rich display of LaTeX formula.
        """

        # add $'s at start and end if not present
        if self.eqntext.strip()[0] != "$" and self.eqntext.strip()[-1] != "$":
            return "$" + self.eqntext + "$"
        else:
            return self.eqntext

myeqn = "x = y^2"

然后在代码单元格中，如果你这样做，例如，

LaTeXEquation(myeqn)

它将显示格式化的方程式。

有一天我在使用colab时遇到了这个问题。我发现最省事的方法就是在打印之前运行这段代码。那么，一切都很有魅力。

from IPython.display import Math, HTML

def load_mathjax_in_cell_output():
  display(HTML("<script src='https://www.gstatic.com/external_hosted/"
               "mathjax/latest/MathJax.js?config=default'></script>"))
get_ipython().events.register('pre_run_cell', load_mathjax_in_cell_output)
import sympy as sp
sp.init_printing()

结果如下所示: