get_file_number.py

#统计C文件和Python文件中有效代码行数
#Python文件中空行，以"#"开头的注释行，不在统计之列
#C文件中空行，以"//"开头的注释行，以"/* comment*/"包围的注释块，不再统计之列
import os
import re
from sys import argv

filename, name= argv

blank_line =re.compile(r"^ *$")

python_comment_line = re.compile(r"^[ |\t]*#")

c_comment_single_line = re.compile(r"^[ |\t]*//")
c_comment_multi_line_start = re.compile(r"[ |\t]*/\*")
c_comment_multi_line_end = re.compile(r".*\*/$")


def python_count(descriptor):
	
	count = 0
	
	for eachline in file_descriptor:

		if not python_comment_line.match(eachline) and not blank_line.match(eachline):
			count = count + 1
	return count
		

def c_count(file_descriptor):

	flag = 0
	count = 0

	for eachline in file_descriptor:
		if flag == 0:
			if not blank_line.match(eachline) and not c_comment_single_line.match(eachline):

				if c_comment_multi_line_start.match(eachline):
					if c_comment_multi_line_end.match(eachline):
						continue
					else:
					 	flag = 1
					 	continue
				else:
					count = count + 1
		else:
		     	if not c_comment_multi_line_end.match(eachline):
				continue
			else:
			     	flag = 0

	return count

file_descriptor = open(name)
print "total good line is %d" % c_count(file_descriptor)

Good.