详解crifan的Python库：crifanLib.py

2.2. 和字符串(str,unicode等)处理有关的函数

#------------------------------------------------------------------------------
# generated the random digits number string
# max digit number is 12
def randDigitsStr(digitNum = 12) :
    if(digitNum > 12):
        digitNum = 12;

    randVal = random.random();
    #print "randVal=",randVal; #randVal= 0.134248340235
    randVal = str(randVal);
    #print "randVal=",randVal; #randVal= 0.134248340235
    
    randVal = randVal.replace("0.", "");
    #print "randVal=",randVal; #randVal= 0.134248340235
    
    # if last is 0, append that 0    
    if(len(randVal)==11):
        randVal = randVal + "0";
    #print "randVal=",randVal; #randVal= 0.134248340235
    
    #randVal = randVal.replace("e+11", "");
    #randVal = randVal.replace(".", "");
    #print "randVal=",randVal; #randVal= 0.134248340235
    randVal = randVal[0 : digitNum];
    #print "randVal=",randVal; #randVal= 0.134248340235
    
    return randVal;
        

captchaUrl += str(randDigitsStr(6));