Edit JS code with Python

Question

I am going to edit a code in JavaScript with Python using a template, but the code dont work, I do a example for append here. I have two documents: "Test.txt" and "Test.py" at same folder.

The content "Test.txt" is:

Prueba = new Trabajador("Sujeto de Prueba", 15, 1000, "7069");

And the Python code is:

Prueba = open("Test.txt","r")
Plantilla = Prueba.read()
Prueba.close()
print(Plantilla)
Plantilla.replace("(\"Sujeto de Prueba\", 15, 1000, \"7069\");","(\"Carolina\", 20, 1500, \"0000\");")
print("/////////////////////////////////////////////////////////////////////////////////////////////////")
print(Plantilla)

but when i execute the code the exit is this:

Prueba = new Trabajador("Sujeto de Prueba", 15, 1000, "7069");
/////////////////////////////////////////////////////////////////////////////////////////////////
Prueba = new Trabajador("Sujeto de Prueba", 15, 1000, "7069");

What am I doing wrong?

PD: Sorry for my english, i am learning.

Answer 1

you have read the text file contents into memory and tried a replace operation but you have not written it back to the text file.

# open the file and read the data
with open("Test.txt","r") as my_file:
temp = my_file.read()
# make the replacement
new_text = temp.replace('this', 'that')
print(new_text)
# write to the file to effect the update of contents
with open("Test.txt","w") as my_file:
my_file.write(new_text)