原理先獲取所有文件，然后統計每個文件中代碼的行數，最后將行數相加，思路很簡單。

import os
import os.path
import time
rootdir = '文件路徑'
filelists = []

遍歷文件
def getFile(rootdir):
    global filelists
    for parent,dirnames,filenames in os.walk(rootdir):
        for dirname in dirnames:
            getFile(os.path.join(parent,dirname)) #嵌套
        for filename in filenames:

        #print "filename is:"+ filename  
        filelists.append(os.path.join(parent,filename))


統計一個文件的行數
def countLine(fname):
    count = 0
    for file_line in open(fname).xreadlines():
        if file_line != '' and file_line != '\n': #過濾掉空行
            count += 1
    print fname + '.....' , count
    return count
if name == 'main' :
    startTime = time.clock()
    getFile(rootdir)
    totalline = 0
    for filelist in filelists:
        totalline = totalline + countLine(filelist)
    print 'totalline:',totalline
    print 'done:%0.2f second' % (time.clock() - startTime)</pre>