How to access the contents of an excel file stored in my model - django

I am developing an app in Django. I have a file model (let's say my_file_model) like this:

class my_file_model(models.Model):
    file = models.FileField(upload_to='myDirectory/', blank=False, null=False)

in which are stored excel sheets like this:

(fixed columns number, variable rows number)

And I have an empty model (let's say output_model) like this:

class output_model(models.Model):

    field_A=models.CharField(max_length=256, blank=False, null=False)
    field_B=models.CharField(max_length=256, blank=False, null=False)
    field_C=models.CharField(max_length=256, blank=False, null=False)

I want to read line by line the data inside the excel file and save it inside my output_model,
so that I get something like this:

output_model:

    object 1:

        field_A: a
        field_B: b
        field_C: c

    object 2:

        field_A: d
        field_B: e
        field_C: f      

    object 3:

        field_A: g
        field_B: h
        field_C: i  

    ...
        ...

How can I do it?

Here is my script as far as I could write it:

def pour_entire_my_file_model():

    import pandas as pd
    from .models import my_file_model, output_model

    all_files = my_file_model.objects.all()  

    for file_element in all_files: 

        # I don't know how to access the excel file contents.

        for row in file_element:

            # I don't know how to access a certain excel file cell value of a file that is in my model.

            output_model.objects.create(field_A=cell(row,1)) # it's a
            output_model.objects.create(field_B=cell(row,2)) # it's b
            output_model.objects.create(field_C=cell(row,3)) # it's c