Python 在For While循环之后不再定义列表

我正在编写一个脚本，我想去掉一个嵌套列表，该列表是从文本文件中排序数据时创建的。删除嵌套列表并将其放入“已清理”列表后，我想对该列表进行排序并删除不需要的信息。我的问题出现在打印列表时。在for循环之前键入print时，它会正确打印。之后，我得到一个错误，当列表在顶部明确定义并在程序的前面引用时，列表没有定义

这是在for循环之后打印时出现的错误：

Traceback (most recent call last):
  File "DIRECTORY OF PROGRAM.py", line 64, in <module>
    print(clnwrd)
NameError: name 'clnwrd' is not defined

---

在有人问我之前，我检查了身份，确保打印语句在for循环之外。欢迎提供任何帮助。

错误出现在代码的一行中：

del clnwrd

我想你的意思可能是：

def clnwrd[index of value]

以下代码适用于我： 完整代码：

import os
import sys

words = []
clnwrd = []


# checks for apostrophes
def apostro(value):
    if value == '\'':
        return True

    else:
        return False


# removes nesting lists
def nonest(x, newlist):
    for y in x:
        for z in y:
            newlist.append(str(z))

    return newlist


# opens file
with open('Path to specified file', 'r') as data:
    for line in data:
        word = ""

        for character in line:
            # skips apostrophes
            if character == '\'':
                pass

            else:
                # adds words to the list
                word += str(character)

        # splits words by selected character
        if "THINg" in word:
            words.append(word.split("THING"))

            if "THING" in word:
                words.append(word.split("THING"))

        else:
            words.append(word.split("Key."))

nonest(words, clnwrd)

print(clnwrd)  # THE PRINT STATEMENT WORKS HERE
idx = 0
for thing in clnwrd:
    if "THING" in thing:
        del clnwrd[idx]

    if "THING" in thing:
        thing.split("THING")

    if "THING" in thing:
        thing.split("THING")
    idx += 1

print(clnwrd) # PRINT STATEMENT WORKS HERE AS WELL

说明：

import os
import sys

words = []
clnwrd = []


# checks for apostrophes
def apostro(value):
    if value == '\'':
        return True

    else:
        return False


# removes nesting lists
def nonest(x, newlist):
    for y in x:
        for z in y:
            newlist.append(str(z))

    return newlist


# opens file
with open('Path to specified file', 'r') as data:
    for line in data:
        word = ""

        for character in line:
            # skips apostrophes
            if character == '\'':
                pass

            else:
                # adds words to the list
                word += str(character)

        # splits words by selected character
        if "THINg" in word:
            words.append(word.split("THING"))

            if "THING" in word:
                words.append(word.split("THING"))

        else:
            words.append(word.split("Key."))

nonest(words, clnwrd)

print(clnwrd)  # THE PRINT STATEMENT WORKS HERE
idx = 0
for thing in clnwrd:
    if "THING" in thing:
        del clnwrd[idx]

    if "THING" in thing:
        thing.split("THING")

    if "THING" in thing:
        thing.split("THING")
    idx += 1

print(clnwrd) # PRINT STATEMENT WORKS HERE AS WELL

如果未指定索引，

del

用于删除整个列表： 要了解Python中

del

的更多信息，请访问：

---

如果

“THING”

在

THING

中，那么你

del clnwrd

-它在那之后几乎消失了，所以我假设

“THING”

在

THING

中？你删除它，然后问我们为什么找不到它？我还看到

str.split

调用本身没有保存结果。我想你应该再看看你正在使用的任何教学材料。用你自己的话来说，你认为del clnwrd是什么意思？哇，我觉得自己像个白痴。我盯着它看了几个小时，认为它删除了指定的索引，而不是整个列表。非常感谢。