Python WTF

python_wtf.py

# This is the weirdest shit I have ever seen in Python.
# If you call this on a list of directories containing only .cpp files, it's fine.
# If any of the directories contain .c files, there are instant errors!!
# E.g:
# Traceback (most recent call last):
#   File "<stdin>", line 1, in <module>
#   File "python_wtf.py", line 18, in get_objects
#     objects.extend([c_filter(x) for x in c_files])
#   File "python_wtf.py", line 18, in <listcomp>
#     objects.extend([c_filter(x) for x in c_files])
# NameError: global name 'c_filter' is not defined

# Why does this work for one function, but not for the other??!

# Problem solved. It was a typo.

import glob

def get_objects(directories):
	"""Get the names of all the .o files in the given directories."""

	# Filter functions, to turn source filepaths into object filenames
	c_filter = lambda x: x.split("/")[-1].replace(".c", ".o")
	cpp_filter = lambda x: x.split("/")[-1].replace(".cpp", ".o")

	objects = []
	for directory in directories:
		c_files = glob.glob("%s/*.c" % directory)
		objects.extend([c_filter(x) for x in c_files])
		cpp_files = glob.glob("%s/*.cpp" % directory)
		objects.extend([cpp_filter(x) for x in cpp_files])

	return objects