| # Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 |
| # For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt |
| |
| """Run a simple trace function on a file of Python code.""" |
| |
| import os, sys |
| |
| nest = 0 |
| |
| def trace(frame, event, arg): |
| global nest |
| |
| if nest is None: |
| # This can happen when Python is shutting down. |
| return None |
| |
| print("%s%s %s %d @%d" % ( |
| " " * nest, |
| event, |
| os.path.basename(frame.f_code.co_filename), |
| frame.f_lineno, |
| frame.f_lasti, |
| )) |
| |
| if event == 'call': |
| nest += 1 |
| if event == 'return': |
| nest -= 1 |
| |
| return trace |
| |
| the_program = sys.argv[1] |
| |
| code = open(the_program).read() |
| sys.settrace(trace) |
| exec(code) |
