高效编码的 Python 技巧和窍门

摘要：# Traditional approachsquared_numbers = for num in range(1, 6): squared_numbers.append(num ** 2)# Using list comprehensionsquared_

设置虚拟环境以隔离项目依赖关系。它将项目的依赖项与系统范围的依赖项分开，确保一个干净且可重现的环境。

# Create a virtual environmentpython -m venv myenv# Activate the virtual environmentsource myenv/bin/activate # On Unix or MacOSmyenv\Scripts\activate # On Windows

使用列表推导式获取简洁易读的代码。它们是在一行中创建列表的强大工具。

# Traditional approachsquared_numbers = for num in range(1, 6): squared_numbers.append(num ** 2)# Using list comprehensionsquared_numbers = [num ** 2 for num in range(1, 6)]

利用元组解包来简化变量赋值。

# Without unpackingcoordinates = (3, 4)x = coordinates[0]y = coordinates[1]# With unpackingx, y = coordinates

采用 f 字符串进行字符串格式设置。它们简明扼要，语法清晰。

name = "John"age = 30# Traditional formattingmessage = "My name is {} and I'm {} years old.".format(name, age)# Using f-stringmessage = f"My name is {name} and I'm {age} years old."python# Without context managerfile = open("example.txt", "r")content = file.readfile.close# With context managerwith open("example.txt", "r") as file: content = file.read