无法从长字符串中删除某些符号

Question

在过去的几个小时里，我一直在尝试一次从长字符串中踢出一些符号，但找不到关于如何删除它们的任何想法。如果我选择使用 .replace() 函数，这将是一种更丑陋的方法，因为符号的数量超过一个，并且函数变得过长以覆盖所有符号。任何删除它们的替代方法将不胜感激。

这是我试过的：

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

我想删除的是该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

您可以使用带有替换的 for 循环：

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

实际上，您的第二次尝试已经非常接近了。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)

如果您想将 & 替换为 and 运行另一个：

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

并从第一个 regex character group ['()&] 中删除 &。

Answer 3

它也有作用：

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)

无法从长字符串中删除某些符号

Can't remove some symbols from a long string

python

string

symbols

python-3.x