Record all different call stacks that arrive at a method

stack_tracker.py

from collections import Counter
import traceback

stack_counts = Counter()
    
def record(limit=10):
    stack = traceback.extract_stack(limit=limit+1)[:-1]
    stack_report = '\n'.join(map(str, stack))
    stack_counts[stack_report] += 1
    
def print_report():
    # negative count to display highest count first
    entries = [(-count, stack_report)
               for stack_report, count in stack_counts.iteritems()]
    entries.sort()
    
    print '== {} stack traces =='.format(sum(stack_counts.values()))
    for count, stack_report in entries:
        print '=== {} times ==='.format(-count)
        print stack_report
        print