defpop_multiple(lst,indices):# 先排序索引,以确保从后往前删除indices=sorted(indices,reverse=True)popped_elements=[lst[i]foriinindices]foriinindices:lst.pop(i)returnpopped_elements my_list=[10,20,30,40,50]indices_to_pop=[1,3]# 删除 20 和 40removed_elements=pop_multiple(my_list,indices_to...
from pygame import image, Rect, Surface def get_tile_rect(x, y): """Converts tile indices to a pygame.Rect""" return Rect(x * SIZE, y * SIZE, SIZE, SIZE) def load_tiles(): """Returns a dictionary of tile rectangles""" tiles = {} for symbol, x, y in TILE_POSITIONS: tiles...
defrepeat(word, n):print(word * n) 如果我们像这样调用它,它会显示蒙提·派森歌曲《芬兰》的第一行。 repeat('Finland, ',3) Finland, Finland, Finland, 这个函数使用print函数来显示一个字符串,但它没有使用return语句返回值。如果我们将结果赋值给一个变量,它仍然会显示这个字符串。 result = repeat('F...
### (4) 删除元素(.remove、.pop、del)**(a) .remove: 删除单个元素,删除首个符合条件的元素,按值删除**```pythonstr=[1,2,3,4,5,2,6]str.remove(2) # [1, 3, 4, 5, 2, 6]```**(b) .pop: 删除单个或多个元素,按位删除(根据索引删除)**...
Rungit stash popto get your stashed changes back. Git stash stores the changes you made to the working directory locally (inside your project's .git directory;/.git/refs/stash, to be precise) and allows you to retrieve the changes when you need them. It's handy when you need to switc...
与前面方法类似,只是每个个体是一个排列组合,因此用的indices,从给定序列里随机采样IND_SIZE个数 import random from deap import base from deap import creator from deap import tools creator.create("FitnessMin", base.Fitness, weights=(-1.0,))
1. 常见内置函数 type() #查看类型 dir() help() len() open() #文本文件的输入输出 range() enumerate() zip() #循环相关 iter() #循环对象 map() filter() reduce() #函数对象 abs(-2) #取绝对值 round(2.3) #取整 pow(3,2) #乘方 cmp(3.1, 3.2) #比较大小 divmod(9, 7) #返回除法的...
If multiple instances exist when a resize happens, key-sharing is disabled for all future instances of the same class: CPython can't tell if your instances are using the same set of attributes anymore, and decides to bail out on attempting to share their keys. A small tip, if you aim ...
The valid indices for this list are 0, 1, and 2 (since Python uses zero-based indexing). If you try to accessmy_list[3]or any index outside this range, Python will raise this error. It's the interpreter's way of signaling that there's a misalignment in your expectations of the li...
A Python dictionary is a mapping between a set of indices (keys) and a set of values. It is an extremely useful data storage construct where each element is accessed by a unique key.The following are the Python dictionary methods that you can use for the various dictionary operations....