Help: How to fix it ?

mjus

Below code snippet got choked in pyhton3.0 while it does job in python2.5
I highlighted the line that caused the breaking in red color and the compiler says

Traceback (most recent call last):
  File "ph.py", line 312, in <module>
     key = string.strip( key )
AttributeError: 'module' object has no attribute 'strip'

I'm quite new to Python.  please tell me what is wrong and how to fix it.
Thanks in advance.

Regards,

if __name__ == '__main__':
    if len(sys.argv) == 1:
        sys.stdout = sys.stderr
        print ('Usage: %s <input filename>' % sys.argv[0])
        print ('  The input file contains pairs of lines.  The first line')
        print (' each pair is a string containing a key.  The second line')
        print (' is an integer which is the desired hash code.')
        sys.exit()

    input = open(sys.argv[1], 'r')
    keys = []
    while 1:
        key = input.readline()
        if key == "": break
        hashcode = input.readline()
        if hashcode == "":
            sys.stderr.write('Odd number of lines in file\n')
            sys.exit()

        key = string.strip( key )
        hashcode = int(hashcode)
        keys.append( (key,hashcode) )

    input.close()
    sys.stderr.write('%i key/hash pairs read\n' % len(keys) )
    generate_hash( keys )

千年沉寂

改成
key = key.strip(" ")
试试

如果key结尾包含回车符的话：
key = key.rstrip("\n")
key = key.strip(" ")

[ 本帖最后由 千年沉寂 于 2009-5-9 08:25 编辑 ]

mjus

Hi 千年沉寂,
    your solutions are cool ! I still have another function has the same issue:
    def __init__(self, N):
        self.N = N
        junk = ""
        for i in range(10):
            junk = junk + random.choice(string.letters + string.digits)
        self.junk = junk

The compiler says
    junk = junk + random.choice(string.letters + string.digits)
AttributeError: 'module' object has no attribute 'letters'

How to fix it ? Thank you so much !!!

千年沉寂

import string ...... junk = junk + random.choice(string.ascii_letters + string.digits) ##### Public string module variables: ascii_letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' ascii_lowercase = 'abcdefghijklmnopqrstuvwxyz' ascii_uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' digits = '0123456789' hexdigits = '0123456789abcdefABCDEF' octdigits = '01234567' printable = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTU... punctuation = '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~' whitespace = ' \t\n\r\x0b\x0c'

>>> # You will get the doc about 'string' module if you try like follow >>> import string >>> help(string) Help on module string: ..........

[ 本帖最后由 千年沉寂 于 2009-5-9 10:02 编辑 ]

mjus

Oh yeah !  Thank you very much ! by the way, where can I find out the string module's document ?
is there something like perldoc in perl ? thanks a lot.

mjus

Oh yeah !  Thank you very much ! by the way, where can I find out the string module's document ?
is there something like perldoc in perl ? thanks a lot.

千年沉寂

Have not learned Perl， so I do not know anything about PerlDoc.
If u intend to learn more about string module, maybe u can read the code of string.py.
The path of string.py is like this:C:\python31\lib\string.py

千年沉寂

http://docs.python.org/library/string.html

mjus

your informative feedback is invaluable. many thanks !

千年沉寂