如何使用列表替换字符串的某些部分？

Question

namelist = ['John', 'Maria']
e_text = 'John is hunting, Maria is cooking'

我需要替换“john'和”maria'。我怎么能这么做呢？

我试过:

for name in namelist:
    if name in e_text:
        e_text.replace(name, 'replaced')

但它只适用于“john'”。结果是:“被取代的是打猎，玛丽亚是烹饪”。我如何替换这两个名字？

谢了。

Answer 1

您可以对名称进行regex更改，然后对其进行 :

namelist = ['John', 'Maria']
pattern = r'\b(?:' + '|'.join(namelist) + r')\b'
e_text = 'John is hunting, Maria is cooking'
output = re.sub(pattern, 'replaced', e_text)
print(e_text + '\n' + output)

这将打印:

John is hunting, Maria is cooking
replaced is hunting, replaced is cooking

Answer 2

在python中，字符串是不可变的，所以替换不会修改字符串，只返回一个修改过的字符串。您应该重新分配字符串:

for name in namelist:
    e_text = e_text.replace(name, "replaced")

在e_text/code>检查中不需要 如果找不到它就已经什么都不做了。