Fastpython

Python 快速上手

本章节将记录python的基本语法，通过阅读，你可以快速上手读懂简单代码。（当然gpt也是大家的好帮手）

但非常建议大家在有精力时可以体系化的学习学习这门语言

判断语句

and 或者 or，后面用冒号，tab分层，elif

if course_num == 50:
    # code block1
elif not course_num == 51:
    # code block2

we dont have to use the exclamation point symbol！, the vertical bar|, ampersand&

bool变量（二元判断符）

letter = True if input().isalpha() else False

Loop循环

counter = 0
while counter < 100:
    print(counter)
    counter += 1

for x in range(100):
    print(x)
for x in range(0, 100, 2)
    print(x)
# not include 100

Loop(redux)

pizza = {
    "cheese": 9,
    "pepperoni": 10,
    "vegetable": 11,
    "chicken": 12
}

for pie in pizza:
    print(pie)

for pie,price in pizza.items():
    print(price)
    print("A whole {} pizza costs ${}".format(pie,price))
    print("A whole"+ pie + "pizza costs $" + str(price))
    print("A whole %s pizza costs $%2d" % (pie,price)) # deprecated in python3

List列表

nums = [x for x in range (10)]
nums.append(11)
nums.insert(10,11)
nums[len(nums):] = [11]

Tuple元组

for prez,year in presidents:
    print("In {1}, {0} took office".format(prez,year))

Dictionary

Function

def square(x):
    return x * x || return x**2

Object

It's similar to c++.

class Student():

    def __init__(self, name, id):
        self.name = name
        self.id = id

    def change_ID(self, id):
        self.id = id

    def print(self):
        print("{} - {}".format(self.name, self.id))

jane = Student("Jane", 10)
jane.print()
jane.change_ID(11)
jane.print()

Data structure

runoob

遍历技巧的函数：items、enumerate、zip、reverse、sorted

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Last update: 2024年1月28日 13:01:36
Created: 2023年8月7日 22:37:58