How to make code loop instead of running with specific files one at a time

GilGrodzinsky

Hi Everyone: I have this code that works:

if not hasattr(sys, 'argv'): #only use if system has issue with relpath command
sys.argv = ['']

import arcpy, os, sys, locale

relpath = os.path.dirname(sys.argv[0])
p = arcpy.mp.ArcGISProject(relpath + r'C:/Users/ggrodzinsky/Documents/ArcGIS/Projects/MyProject8/MyProject8.aprx')
m = p.listMaps()[0]
l = m.listLayers("cb_2018_us_county_500k")[0]
sym = l.symbology
if hasattr(sym, 'renderer'):
if sym.renderer.type == 'SimpleRenderer':
sym.updateRenderer('GraduatedColorsRenderer')

l.symbology = sym

sym.renderer.classificationField = 'Sheet4.AWATER'
sym.renderer.breakCount = 7

breakVal = 1000
cv = 0
lw = 1
for brk in sym.renderer.classBreaks:
brk.upperBound = breakVal
brk.label = "\u2264" + str(locale.format("%d", breakVal, grouping=True))