Python编程从入门到实践（2）学习笔记

学习了第三章 关于数组 书上说叫 列表

# 第三章 数组
# 数组 打印的是全部 ['trek','cannondale','redline','specialized']
bicycles = ['trek', 'cannondale', 'redline', 'specialized']
print(bicycles)

print(bicycles[0])
print(bicycles[0].title())
print(bicycles[-1])

# 数组增删改
motorcycles = ['honda', 'yamaha', 'suzuki']
print(motorcycles)
motorcycles[0] = 'ducati'
print(motorcycles)

motorcycles.append('zzz')
print(motorcycles)

motorcycles = []
motorcycles.append('honda')
motorcycles.append('yamaha')
motorcycles.append('suzuki')
print(motorcycles)

# 插入元素
motorcycles.insert(0, 'ducati')
print(motorcycles)
del motorcycles[0]
print(motorcycles)

# pop
motorcycles = ['honda', 'yamaha', 'suzuki']
print(motorcycles)
# 最后一个
motorcycles.pop()
print(motorcycles)
# 第一个
motorcycles.pop(0)
print(motorcycles)

# 永久排序
cars = ['bmw', 'audi', 'toyota', 'subaru']
cars.sort()
print(cars)
cars.sort(reverse=True)
print(cars)

# 临时排序
cars = ['bmw', 'audi', 'toyota', 'subaru']
print(sorted(cars))
print(sorted(cars,reverse=True))
print(cars)

#反转
cars = ['bmw', 'audi', 'toyota', 'subaru']
cars.reverse()
print(cars)
len(cars)

#越界
# print(cars[4])
# zz = []
# print(zz[-1])