Python 筆記

Python notes

1 min readNov 22, 2020

有新知識就更新，有錯誤歡迎留言指正，感恩

Content:
+ Module vs. Package
+ Clean code 必學技巧
+ Lambda
+ Bad pattern to avoid

Module vs. Package

A module is a .py file, a package is a folder with an __init__.py file. When you import a package as a module, the contents of __init__.py module are imported.

A Python module is simply a Python source file, which can expose classes, functions and global variables.

module = file
package = directory

Clean code 必學技巧

5 coolest Python features to learn

list comprehensions
generator expression
slice assignment
iterable unpacking (destructure)
dictionary comprehensions

list init

list = [False] * len(3) # [False, False, False]

Lambda

<空>

Bad pattern (要避免的 pattern)

ITM (Initialize Then Modify)

先宣告後修改

// Initialize
i = 0
for t in X:
// Then Modify
i += 1

上例解法: e.g. 改用 enumerate

Reference

[2] Corey schafer. Python OOP Tutorial 1: Classes and Instances. (2016)