Python脚本删除除“以外的所有行”；“好话”；

我有一个相反的脚本，效果很好，但需要一个脚本，将删除所有行，除了有“好词”的行，这将是这个脚本的反面，对坏词很好。感谢您的帮助

bad_words = ['abc:', 'xyz:']  
with open('poop.txt') as badfile, open('Clean.txt', 'w') as cleanfile:
    for line in badfile:
      clean = True
    for word in bad_words:
        if word in line:
            clean = False
    if clean == True:
        cleanfile.write(line)

---

为了只写不好的单词，您需要反转决定是否写的条件。将

True

更改为

False

bad_words = ['abc:', 'xyz:']  
with open('poop.txt') as badfile, open('Clean.txt', 'w') as cleanfile:
    for line in badfile:
      clean = True
      for word in bad_words:
          if word in line:
              clean = False
      if clean == False:
          cleanfile.write(line)

---

这也可以通过使用

not

运算符来表示。因此，您可以编写

if not clean:

使用for语句缩进另一个if，并反转最后一个if

bad_words = ['abc:', 'xyz:']  
with open('poop.txt') as badfile, open('Clean.txt', 'w') as cleanfile:
    for line in badfile:
      clean = True
      for word in bad_words:
          if word in line:
              clean = False
      if not clean == True:
          cleanfile.write(line)

---

哟，只需交换干净的布尔值…非常感谢。