In the world of Python, the underscore "_" is not only a simple symbol, but it also carries a lot of programming tips that can make your coding work easier and more efficient.
Quick recap: underline the mysterious power of the console
When you're doing continuous calculations in the Python console, knowing how to quickly reference the previous output can greatly improve your efficiency. The underscore "_" plays an important role here, automatically storing the result of the most recent expression.
From Ignore to Extract: The Clever Use of Underscores in Data Processing
When dealing with complex data, we don't always need every single part. Using underscores gracefully omits unwanted parts of the data structure, while also picking only a few of the items we care about when the function returns multiple values.
# 忽略不需要的返回值
def fetch_data():
return 1, 'Alice', 'Data'
_, name, _ = fetch_data()
print(name) Code aesthetics: Underlining helps you write more Pythonic code
In Python, naming conventions are very important. By using underscores, we can not only clearly identify the privateness and protection level of variables, but also design the API to indicate that certain methods should not be called directly externally.
class Car:
def __init__(self):
self._speed = 0 # 受保护的属性
self.__name = None # 私有属性
def _increase_speed(self): # 不建议外部直接调用
self._speed += 10 Visualization tip: Use underlines to make numbers easy to read
For large numbers, using an underscore as a separator can significantly improve their readability. This is especially useful when working with finances, scientific calculations, or large amounts of data.
Mastering the skills of using underscores in Python will not only improve your coding efficiency, but also make your code more neat and professional. Whether in day-to-day data processing or in complex project development, the rational use of underscores will be your powerful assistant. Keep exploring more Python tips to make your coding journey even more exciting!