python list

2018-09-04 本文已影响23人村长225

列表特性

empty = []

numbers = [1, 2, 3, 4, 5]

strings = ['apple', 'banana', 'orange']

mixed = [12, 55, 'China', {'age': 25}]

nested = [10, 20, [1, 2, 3, 4]]

numbers = [10, 20, 30, 40, 50]
numbers[0] # 10

numbers = [10, 20, 30, 40, 50]
del numbers[1] # [10, 30, 40, 50]

numbers = [10, 20, 30, 40, 50]
len(numbers) # 5

numbers = [10, 20, 30, 40, 50]
max(numbers) # 50
min(numbers) # 10

numbers = [10, 20, 30, 40, 50]
for number in numbers:
    print(number)

numbers = [10, 20, 30, 40, 50]
for index in range(len(numbers)):
    numbers[index] = numbers[index] * 2

a = [1, 2, 3]
b = [4, 5, 6]
c = a + b # [1, 2, 3, 4, 5, 6]

x = [1, 2, 3] * 2 # [1, 2, 3, 1, 2, 3]

1 in [1, 2, 3] # True