Menyusun sebuah docstring

Anda memutuskan untuk menulis paket Python open-source pemrosesan bahasa alami terbaik di dunia. Paket ini akan merevolusi pekerjaan dengan teks bebas, seperti numpy untuk array, pandas untuk data tabular, dan scikit-learn untuk machine learning.

Fungsi pertama yang Anda tulis adalah count_letter(). Fungsi ini menerima sebuah string dan satu huruf, lalu mengembalikan jumlah kemunculan huruf tersebut dalam string. Anda ingin para pengguna paket open-source Anda mudah memahami cara kerja fungsi ini, sehingga Anda perlu memberinya docstring. Susun docstring bergaya Google untuk fungsi ini dengan mengikuti langkah-langkah berikut.

Latihan ini adalah bagian dari kursus

Menulis Function di Python

Latihan interaktif praktis

Cobalah latihan ini dengan menyelesaikan kode contoh berikut.

# Add a docstring to count_letter()
def count_letter(content, letter):
  ____
  if (not isinstance(letter, str)) or len(letter) != 1:
    raise ValueError('`letter` must be a single character string.')
  return len([char for char in content if char == letter])

Edit dan Jalankan Kode

Latihan ini adalah bagian dari kursus

Menulis Function di Python

SkillTag.level.intermediateSkillTag.label

4.8+

Mulai Kursus Gratis

The goal of this course is to transform you into a Python expert, and so the first chapter starts off with best practices when writing functions. You'll cover docstrings and why they matter and how to know when you need to turn a chunk of code into a function. You will also learn the details of how Python passes arguments to functions, as well as some common gotchas that can cause debugging headaches when calling functions.

Exercise 1: Docstring Exercise 2: Menyusun sebuah docstring

Latihan Saat Ini

Exercise 3: Mengambil docstring Exercise 4: Docstring jadi penyelamat!Exercise 5: DRY dan "Lakukan Satu Hal"Exercise 6: Ekstrak sebuah fungsi Exercise 7: Membagi sebuah fungsi Exercise 8: Pass by assignment Exercise 9: Mutable atau immutable?Exercise 10: Praktik terbaik untuk argumen default

If you've ever seen the "with" keyword in Python and wondered what its deal was, then this is the chapter for you! Context managers are a convenient way to provide connections in Python and guarantee that those connections get cleaned up when you are done using them. This chapter will show you how to use context managers, as well as how to write your own.

Exercise 1: Using context managers Exercise 2: The number of cats Exercise 3: The speed of cats Exercise 4: Writing context managers Exercise 5: The timer() context manager Exercise 6: A read-only open() context manager Exercise 7: Advanced topics Exercise 8: Context manager use cases Exercise 9: Scraping the NASDAQ Exercise 10: Changing the working directory

Decorators are an extremely powerful concept in Python. They allow you to modify the behavior of a function without changing the code of the function itself. This chapter will lay the foundational concepts needed to thoroughly understand decorators (functions as objects, scope, and closures), and give you a good introduction into how decorators are used and defined. This deep dive into Python internals will set you up to be a superstar Pythonista.

Exercise 1: Functions are objects Exercise 2: Building a command line data app Exercise 3: Reviewing your co-worker's code Exercise 4: Returning functions for a math game Exercise 5: Scope Exercise 6: Understanding scope Exercise 7: Modifying variables outside local scope Exercise 8: Closures Exercise 9: Checking for closure Exercise 10: Closures keep your values safe Exercise 11: Decorators Exercise 12: Using decorator syntax Exercise 13: Defining a decorator

Now that you understand how decorators work under the hood, this chapter gives you a bunch of real-world examples of when and how you would write decorators in your own code. You will also learn advanced decorator concepts like how to preserve the metadata of your decorated functions and how to write decorators that take arguments.

Exercise 1: Real-world examples Exercise 2: Print the return type Exercise 3: Counter Exercise 4: Decorators and metadata Exercise 5: Preserving docstrings when decorating functions Exercise 6: Measuring decorator overhead Exercise 7: Decorators that take arguments Exercise 8: Run_n_times()Exercise 9: HTML Generator Exercise 10: Timeout(): a real world example Exercise 11: Tag your functions Exercise 12: Check the return type Exercise 13: Great job!