# To draw a slice at equidistant locations throughout 
# your domain for many files you could do something 
# roughly like this

import tecplot as tp
import numpy as np

files = "" #... list of files to process ...

for f in files:
    # Load data in Tecplot format
    dataset = tp.data.load_tecplot(f)

    # Get the extents in the X direction
    xmin, xmax = dataset.variable('X').minmax() 

    # Create 10 slice positions across the domain
    slice_positions = np.linspace(xmin, xmax, 10)

    # Loop over the positions and export an image
    for slice_pos in slice_positions:
       # ... execute commands to set slice position and plot style ...
       # see 03_slices_along_wing.py in your Tecplot installation's 
       # pytecplot/examples folder
       
       # export the image
        tp.export.save_png("outputfile_slice_{}".format(slice_pos))
        
# See https://www.tecplot.com/docs/pytecplot/api/tecplot.plot_style.html#id119
# for more