快速提高 Python 功力的高效路径
Python 作为一门多功能语言,想要快速提升功力需要有针对性的学习和实践。以下是系统化的提升方案:
一、基础强化训练(1-2周)
1. 核心语法精要
# 列表推导式 vs 生成器表达式
squares = [x**2 for x in range(10)] # 内存中立即生成
squares_gen = (x**2 for x in range(10)) # 惰性求值
# 字典合并技巧
dict1 = {
'a': 1, 'b': 2}
dict2 = {
'b': 3, 'c': 4}
merged = {
**dict1, **dict2} # {'a': 1, 'b': 3, 'c': 4}
# 海象运算符(Python 3.8+)
if (n := len('hello')) > 3:
print(f"Length {
n} is greater than 3")
2. 函数高级用法
# 装饰器工厂
def retry(max_attempts=3):
def decorator(func):
def wrapper(*args, **kwargs):
attempts = 0
while attempts < max_attempts:
try:
return func(*args, **kwargs)
except Exception as e:
attempts += 1
print(f"Attempt {
attempts} failed: {
e}")
raise Exception("Max retries exceeded")