去掉标点符号

Question

我需要把去掉标点符号的功能加进来，这样文件里的文本就能在打印时不带标点。比如说，有一行："你今天好吗？"

到目前为止，它打印出来是：

"how
are
you
today?"

但我想要的打印结果是：

how
are
you
today

我的代码看起来是这样的：

from scanner import *
import sys
import string

def processFile(filename):
    s = Scanner(filename)
    token = s.readtoken()
    array = []
    while token != "":
        newToken = ""
        for i in range(0,len(token),1):
            newchar = RawChar(token[i])
            newToken = newToken + newchar
        array.append(newToken)
        token = s.readtoken()
    s.close()
    return array

def eachLine(tokens):
    for i in range(0,len(tokens),1):
        pun(tokens[i])
        print(tokens[i])
    return

def pun(string):
    punctuation = ["`","~","!","@","#","$","%","^","&","*","(",")","_","-","+","=","{","[","}","]","|",":",";","\"","'","<",",",">",".","?","/"]
    for i in string:
        newString = ""
        if i not in string:
            newString = newString + i
    return newString

def RawChar(char):
    if char == "A":
        char = "a"
    elif char == "B":
        char = "b"
    elif char == "C":
        char = "c"
    elif char == "D":
        char = "d"
    elif char == "E":
        char = "e"
    elif char == "F":
        char = "f"
    elif char == "G":
        char = "g"
    elif char == "H":
        char = "h"
    elif char == "I":
        char = "i"
    elif char == "J":
        char = "j"
    elif char == "K":
        char = "k"
    elif char == "L":
        char = "l"
    elif char == "M":
        char = "m"
    elif char == "N":
        char = "n"
    elif char == "O":
        char = "o"
    elif char == "P":
        char = "p"
    elif char == "Q":
        char = "q"
    elif char == "R":
        char = "r"
    elif char == "S":
        char = "s"
    elif char == "T":
        char = "t"
    elif char == "U":
        char = "u"
    elif char == "V":
        char = "v"
    elif char == "W":
        char = "w"
    elif char == "X":
        char = "x"
    elif char == "Y":
        char = "y"
    elif char == "Z":
        char = "z"
    return char

def main():
    newForm = processFile(sys.argv[1])
    eachLine(newForm)

main()

有没有建议我应该把def pun(string)放在哪里？

Answer 1

import string
s = '"Right now!" she shouted, and hands fluttered in the air - amid a few cheers - for about two minutes.'
x = "".join([c for c in s if or c not in string.punctuation])

这段代码的意思是……

首先，它定义了一个变量，这个变量可以用来存储一些信息。接着，它可能会进行一些操作，比如计算、比较或者改变这个变量的值。

然后，代码可能会有一些条件判断，比如“如果这个条件成立，就执行某个操作”，这样可以让程序根据不同的情况做出不同的反应。

最后，代码可能会输出一些结果，或者把处理后的信息展示给用户。

总之，这段代码的主要目的是通过一系列的指令来完成特定的任务。

Answer 2

你可以通过使用这篇StackOverflow文章中介绍的方法，显著提高去掉标点符号的效果。然后再用s.lower()把字符串s转换成小写字母。

Answer 3

要从一个字符串中去掉标点符号，可以使用 str.translate 这个方法：

In [124]: import string

In [126]: string.punctuation
Out[126]: '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'

In [127]: '"How are you today?"'.translate(None, string.punctuation)
Out[127]: 'How are you today'