I have a long file containing thousands of lines and a couple of samples are shown below:

begin{align*}
  H_0 amp : mu_1 = mu_2 = mu_3 = mu_4 = mu_5 \
  H_1 amp : text{Some text} \ 
  H_2 amp : text{More text...} \ 
end{align*}

begin{table}[htb]
  centering
  begin{tabular}{cc}
    Mean   amp = amp the mean value $mu$       \
    Median amp = amp the median value $median$ \
    Mode   amp = amp the mode value $mode$     \
  end{tabular}
end{table}

The objective is to turn begin{align*}...end{align*} into

<md>
  <mrow>H_0 amp : mu_1 = mu_2 = mu_3 = mu_4 = mu_5</mrow>
  <mrow>H_1 amp : text{Some text}</mrow>
  <mrow>H_2 amp : text{More text...}</mrow>
</md>

and begin{table}[htb]...end{table} to

<table>
  <tabular halign="center">
    <row header="yes" bottom="minor" >
      <cell>Mean</cell>
      <cell>=</cell>
      <cell>the mean value $mu$</cell>
    </row>
    <row>
      <cell>Median</cell>
      <cell>=</cell>
      <cell>the mode value $mode$</cell>
    </row>
    <row>
      <cell>Mode</cell>
      <cell>=</cell>
      <cell>the mode value $mode$</cell>
    </row>
  </tabular>
</table>

I am trying to get begin{align*} working and haven’t started on begin{table} yet. I have made a script for it but doesn’t work as expected. I believe it is because I am using re.escape(...). There are too many unnecessary characters generated. I want to eliminate the extra ‘s and also remove begin{align*} along with end{align*} during the process. Any assistance is appreciated!

<md><mrow>begin{align*}
  H_0 amp : mu_1 = mu_2 = mu_3 = mu_4 = mu_5 </mrow><mrow>
  H_1 amp : text{Some text} </mrow><mrow> 
  H_2 amp : text{More text...} </mrow> 
end{align*}</md>

begin{table}[htb]
  centering
  begin{tabular}{cc}
    Mean   amp = amp the mean value $mu$       \
    Median amp = amp the median value $median$ \
    Mode   amp = amp the mode value $mode$     \
  end{tabular}
end{table}

import re

my_file = open("sample.txt", "r")
data: str = my_file.read()
result: str = data

original = re.findall(r'\begin{align*}[sS]*\end{align*}', data,)
modified = re.findall(r'\begin{align*}[sS]*\end{align*}', data,)

for i in range(len(modified)):
  # append the first mrow of the <md> tag
  modified[i] = r'<mrow>' + modified[i] 
  # replace \ with a closing and opening of </mrow> and <mrow>.
  modified[i] = str(modified[i]).replace(r'\', r'</mrow><mrow>')
  #wrap everything with the math display environment
  modified[i] = '<md>' + modified[i]+r'</md>'
  # Remove the last <mrow> as it is an extra
  modified[i] =(modified[i][::-1].replace(r'<mrow>'[::-1], ''[::-1], 1))[::-1]
  
  
  result = re.sub(re.escape(original[i]), re.escape(modified[i]), result)
  # print(modified[i])
  # print(original[i])
  print(result)