Question

最近几个小时，我一直在尝试从长字符串中踢出一些符号，但是我找不到如何删除它们的任何想法。如果我选择使用.replace()函数，这将是一个更丑陋的方法，因为符号的数量超过一个，并且该函数变得过长而无法覆盖所有符号。删除它们的任何其他方法将受到高度赞赏。

这是我尝试过的：

exmpstr = "Hi there Sam! Don't you know that Alex (the programmer) created something useful or & easy to control"

print(exmpstr.replace("'","").replace("(","").replace(")","").replace("&",""))
print(exmpstr.replace("['()&]","")) #I know it can't be any valid approach but I tried

我想踢出的是这些字符串中的这些符号'()&，而不是我尝试使用.replace()函数的方式。

Answer 1

您可以将for循环与replace一起使用：

for ch in "['()&]":
    exmpstr = exmpstr.replace(ch, '')

或者您可以使用正则表达式

import re
exmpstr = re.sub(r"[]['()&]", "", exmpstr)

Answer 2

它也可以解决问题：

exmpstr = "Hi there Sam! Don't you know that Alex (the programmer) created something useful or & easy to control"
expectedstr = ''.join(i for i in exmpstr if i not in "'()&")
print(expectedstr)

Answer 3

实际上，您的第二次尝试非常接近。使用正则表达式sub进行替换，可以这样完成：

import re
regex = r"['()&]"

test_str = "\"Hi there Sam! Don't you know that Alex (the programmer) created something useful or & easy to control\""
subst = ""
# You can manually specify the number of replacements by changing the 4th argument
result = re.sub(regex, subst, test_str, 0, re.MULTILINE)
if result:
    print (result)

如果要将&替换为and，请运行另一个：

result = re.sub(r" & ", " and ", test_str, 0, re.MULTILINE)

并从前一个regex character group &中删除['()&]。

Answer 4

使用re模块：

import re

exmpstr = "Hi there Sam! Don't you know that Alex (the programmer) created something useful or & easy to control"

s = re.sub('(\,)|(\[)|(\')|(\()|(\))|(\&)|(\])|(\')', '', exmpstr)

print(s)

输出：

嗨，山姆！您是否不知道程序员Alex创造了一些东西有用或易于控制

无法从长字符串中删除一些符号

4 个答案: