统计一个文件夹下的多个文本文件的行数、空行数和注释行数

'''
有个目录，里面是你自己写过的程序，
统计一下你写过多少行代码。包括空行和注释，但是要分别列出来。
'''

import os, re

def statistic_info(f):
	'''
	statistic the info of a file, include:
	the number of the lines
	the number of the blank lines
	the number of the comment lines(single-line or multiLine comment)
	'''
	comment_lines = 0
	blank_lines = 0
	lines = 0
	is_multicomm = False	# statistic multiLine comment

	for line in f:
		# the current line is not in multiLine comment
		if is_multicomm == False:
			if re.match('^\s+$', line):		# is blank line
				blank_lines = blank_lines + 1
			elif line.lstrip().startswith('#'):		# single-line comment
				comment_lines = comment_lines + 1
			elif line.lstrip().startswith("'''") or line.lstrip().startswith('"""'):	# multiLine comment
				comment_lines = comment_lines + 1
				is_multicomm = True		# note the current line is the beginning of the multiLine comment
		# the current line is in multiLine comment
		elif is_multicomm == True:
			comment_lines = comment_lines + 1
			if line.lstrip().startswith("'''") or line.lstrip().startswith('"""'):
				is_multicomm = False	# note the current line is the end of the multiLine comment
		lines = lines + 1

	return lines, blank_lines, comment_lines


if __name__ == '__main__':
	path = 'Sources'
	source_codes = os.listdir(path)		# Return a list containing the names of the files in the directory.

	lines = 0
	blank_lines= 0
	comment_lines = 0
	lines_total = 0
	blank_total = 0
	comment_total = 0

	for source_code in source_codes:
		print('%s' % (40 * '-'))
		with open(os.path.join(path, source_code), 'r', encoding = 'utf-8') as f:
			lines, blank_lines, comment_lines = statistic_info(f)
			print(source_code + ':')
			print('lines: ', lines)
			print('blank lines: ', blank_lines)
			print('comment linse: ', comment_lines)

			lines_total = lines_total + lines
			blank_total = blank_total + blank_lines
			comment_total = comment_total + comment_lines

	print('\nthe all source code:')
	print('lines_total: ', lines_total)
	print('blank_lines_total: ', blank_total)
	print('commet_linse_total: ', comment_total)