Python论坛的帖子：

Fri May 27 08:08:29 HKT 2005

1. 正则表达式[.]无法匹配中文, 这是问题码？

import re
>>> m = re.match("[.]*", ";测试")
>>> print m
<_sre.SRE_Match object at 0x008E4368>
>>> m.group()
''

2. 如何直接使用python来实现复杂的数据结构，如树, 现在在写个小应用程序时, 需要建立一颗树, 以用来统计建立文件系统时目录的空间大小, 请问那里有相关的库, 或样例代码, 我是从C过来的, 所以使用python还不是很习惯, 看看下面的代码就知道了, 帮忙指点有那些是可以使用python来进一步改进

"""
    Check Script Tools.
    用来检验Script的正确性, 也用于正确设置统计目录空间的大小
"""
import os
import copy
import re
import string

# 去掉一些无效的串
def tripLine(srcStr):
    """
        srcList is String, if should trip
    """
    srcStr = string.upper(srcStr)

    if re.match("^[ \t\n]*$", srcStr):
        return ""  # 空行

    m = re.match("^[ \t]*[^;]*;", srcStr)
    if m:       # 批处理中的注释, 这里只处理使用;开头的注释
        srcStr = m.group()[0 : -1] # 去掉剩下的;

    m = re.match("[^\(]*\(", srcStr)
    if m:
        srcStr = m.group()[0 : -1]  # 去掉 状态字

    m = re.findall("[\d\w]+", srcStr)
    srcStr = ""
    for x in m:
        srcStr = srcStr + x       # 去掉串中的空格和\t

    return srcStr

# 将文件内容转换为一个串的列表
def fileToList(destList, fileName):
    """
        Read file and translate to lines.
    """
    try:
        fp = open(fileName, "r")
    except IOError:
        print "Cannot Open FIle ", fileName
        raise IOError
    st = []
    readStr = ""
    lineNum = int(1)
    readStr = fp.readline()
    st = [lineNum, readStr]
    while readStr:
        st[0] = lineNum
        st[1] = tripLine(readStr)
        if st[1]:            
            destList.append(copy.deepcopy(st))
        else:
            pass
        lineNum = lineNum + 1
        readStr = fp.readline()

    fp.close()
    return

# 错误信息串
__staticErrorStr = (    "Not ERROR",                    # 0x00
                        "P3 ERROR",                     # 0x01
                        "APDU Too Short",               # 0x02
                        "Data Length is not Even",      # 0x03
                        "CLA ERROR, must A0 or C0",     # 0x04
                        "INS ERROR"                     # 0x05
                    )

# 打印错误信息
def __printErrorMsg(errorNum, lNum):
    global __staticErrorStr
    print "Incorrect APDU, Line %d\tReason: %s" %(lNum, __staticErrorStr[errorNum])

def __isCorrectCLA(CLA, lNum):
    if (CLA == "A0") or (CLA == "C0"):
        return
    else:
        __printErrorMsg(0x04, lNum)

def __isCorrectINS(INS, lNum):
    if 1:
        return
    else:
        __printErrorMsg(0x05, lNum)

# 十六进制数值转换用表
__staticHexDecMap = {   "0": 0x00, "1": 0x01, "2": 0x02, "3": 0x03, "4": 0x04, "5": 0x05, "6": 0x06, "7": 0x07, "8": 0x08,
                        "9": 0x09, "A": 0x0A, "a": 0x0A, "B": 0x0B, "b": 0x0B, "C": 0x0C, "c": 0x0C, "D": 0x0D, "d": 0x0D,
                        "E": 0x0E, "e": 0x0E, "F": 0x0F, "f": 0x0F
                    }
def __hexStrToDec(hexStr):
    global __staticHexDecMap
    r = 0L
    for x in hexStr:
        if x in string.hexdigits:
            r = r * 16 + __staticHexDecMap[x]
        else:
            return 0L

    return r

# 校验每行批处理的参数有效性
def isLineParamError(cmdLine):
    lineNum = cmdLine[0]
    cmdData = cmdLine[1]
    dataLen = len(cmdData)

    if (dataLen % 2) != 0:
        __printErrorMsg(0x03, lineNum)
        return 0x01

    dataLen = dataLen / 2
    if dataLen < 5:
        __printErrorMsg(0x02, lineNum)
        return 0x01

    CLA = cmdData[0:2]
    INS = cmdData[2:4]
    P3 = cmdData[8:10]

    __isCorrectCLA(CLA, lineNum)
    __isCorrectINS(INS, lineNum)

    if (len(cmdData[10 : len(cmdData)]) / 2) != __hexStrToDec(P3):
        __printErrorMsg(0x01, lineNum)
        return 0x01

    return 0x00

def checkLineParamError(destList):
    error = 0x00
    tmp = 0x00
    for x in destList:
        tmp = isLineParamError(x)
        if error == 0x00:
            error = tmp

    return error

def main():
    list = []
    fName = os.path.join(os.getcwd(), "Script.cmd")
    fileToList(list, fName)

    if checkLineParamError(list):
        return       

    for x in list:
        print x[0], x[1]

if __name__ == "__main__":
    main()

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标题：[python-chinese] 现在开始写python小程序, 感觉还没习惯, 问几个问� =E2?=