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用 Python 编写第一个文本程序

读取字符串并统计其中的词语

用 Python 编写第一个文本程序 是 CoddyKit 上的免费 NLP Academy 课时。这是第 4 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 NLP Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 NLP Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Time to Write Code

Enough theory, let us write real Python. Your first NLP program will read a sentence and count its words. 🐍

Text Lives in Strings

In Python, a piece of text is a string, written inside quotes. It is the basic container for every word you process.

text = "NLP turns words into meaning"

Print to See It

Use print to show a value on screen. It is the simplest way to check that your text loaded correctly.

text = "NLP turns words into meaning"
print(text)

Splitting Into Words

The split method breaks a string at the spaces, handing you back a clean list of individual words.

words = text.split()
print(words)

A List of Tokens

That result is a list, your very first set of tokens. Each item is one word, ready to be counted or examined.

Counting With len

Wrap the list in len to count its items. This single function tells you how many words the sentence holds.

count = len(words)
print(count)

Putting It Together

A few lines do real NLP: store text, split it, and count the words. You just built a tiny word counter.

text = "NLP turns words into meaning"
words = text.split()
print(len(words))

Try Your Own Sentence

Swap in any sentence you like and run it again. The same three lines work on a tweet, a review, or a poem.

Words vs Characters

Call len on the string itself, not the list, and you count characters instead, spaces included.

print(len(text))

Why This Matters

Counting words feels small, but it is the foundation. Every advanced model still begins by splitting text into pieces.

You Did It

You wrote and understood a working NLP program. From here you only add steps, never start from scratch again. 🎉

Quick Check

You have a string in words after calling split. How do you count the words?

Recap

You stored text in a string, split it into a list, and counted with len: your first real NLP program in Python. 🏆

常见问题解答

「用 Python 编写第一个文本程序」课时是免费的吗？

是的 — 「用 Python 编写第一个文本程序」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 NLP Academy 课程的其余内容，请升级到 CoddyKit PRO。 NLP Academy 课程共包含 4 节课。

「用 Python 编写第一个文本程序」这节课中我会学到什么？

读取字符串并统计其中的词语你通过在浏览器中直接运行的动手代码来练习 NLP Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 NLP Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 NLP Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 4 节课，共 4 节。

「用 Python 编写第一个文本程序」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 NLP Academy 课中编写并运行代码吗？

能。每节 NLP Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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