Question

老师让一个文科女生解释一段Python的代码！实在看不懂。。求大神详解

"""Run all doctests from modules on the command line. For each
module, if there is a "module.txt" file, run that too. However,
if the module.txt file contains the comment "# demo",
then the remainder of the file has its ">>>" lines executed,
but not run through doctest. The idea is that you can use this
to demo statements that return random or otherwise variable results.

Example usage:

python doctests.py *.py
"""

import doctest, re

def run_tests(modules, verbose=None):
"Run tests for a list of modules; then summarize results."
for module in modules:
tests, demos = split_extra_tests(module.__name__ + ".txt")
if tests:
if '__doc__' not in dir(module):
module.__doc__ = ''
module.__doc__ += '\n' + tests + '\n'
doctest.testmod(module, report=0, verbose=verbose)
if demos:
for stmt in re.findall(">>> (.*)", demos):
exec stmt in module.__dict__
doctest.master.summarize()

def split_extra_tests(filename):
"""Take a filename and, if it exists, return a 2-tuple of
the parts before and after '# demo'."""
try:
contents = open(filename).read() + '# demo'
return contents.split("# demo", 1)
except IOError:
return ('', '')

if __name__ == "__main__":
import sys
modules = [__import__(name.replace('.py',''))
for name in sys.argv if name != "-v"]
run_tests(modules, ("-v" in sys.argv))

Answer 1

代码的作用就在开头的6行说明了，会翻译就行了

Answer 2

让文科女生翻译头6行就可以了。

Answer 3

这是文档测试的源码吧，没什么特别的..