1. Python Set()从列表中获取唯一值 (1. Python Set() to Get Unique Values from a List) As seen in our previous tutorial onPython Set, we know that Set stores a single copy of the duplicate values into it. This property of set can be used to get unique values from a list in Python...
One of the simplest and most effective ways to get unique values from a list in Python is by using thesetdata structure. A set is an unordered collection of unique elements, which means it automatically removes duplicates when you convert a list to a set. This method is not only concise ...
例如，去除列表中的重复项可以先将其转化为集合，然后再转回列表：duplicate_numbers =[1,2,2,3,3,3,4,5,5]unique_numbers =list(set(duplicate_numbers))print(unique_numbers)# [1, 2, 3, 4, 5]通过这些转换 ，我们可以更好地利用不同数据结构的优点 ，灵活应对不同的编程任务。第6章 列表在实际项...
加载更多朋友圈数据for i in range(3): browser.execute_script("window.scrollTo(0, document.body.scrollHeight);") time.sleep(2)#获取朋友圈内容moments = browser.find_elements_by_class_name('weui-desktop-moment__main')for moment in ...
>>># 3 into integer myint>>>myint =3>>># a string of characters into a string variable>>>text ='Some text'>>># a floating point number>>>cost =3*123.45>>># a longer string>>>Name ='Mr'+' '+'Fred'+' '+'Bloggs'>>># a list>>>shoppingList = ['ham','eggs','mushrooms...
>>>vec=[-4,-2,0,2,4]>>># create anewlistwiththe values doubled>>>[x*2forxinvec][-8,-4,0,4,8]>>># filter the list to exclude negative numbers>>>[xforxinvecifx>=0][0,2,4]>>># apply afunctionto all the elements>>>[abs(x)forxinvec][4,2,0,2,4]>>># call a ...
| | >>> c = Counter('abcdeabcdabcaba') # count elements from a string | | >>> c.most_common(3) # three most common elements | [('a', 5), ('b', 4), ('c', 3)] | >>> sorted(c) # list all unique elements | ['a', 'b', 'c', 'd', 'e'] | >>> ''.join...
列表list (https://jq.qq.com/?_wv=1027&k=fpqlgUog) 初始化列表 指定元素初始化列表 >>> num=['aa','bb','cc',1,2,3] >>> print num ['aa', 'bb', 'cc', 1, 2, 3] 从字符串初始化列表 >>> a='oiawoidhoawd97192048f' ...
import pyaudio import wave # 打开音频文件 wf = wave.open('test.wav', 'rb') # 创建pyaudio对象 p = pyaudio.PyAudio() # 打开音频流 stream = p.open(format=p.get_format_from_width(wf.getsampwidth()), channels=wf.getnchannels(), rate=wf.getframerate(), output=True) # 播放音频 dat...
Chooses k unique random elements from a population sequence or set. #在range()指定范围内,返回指定个数的随机数样本列表>>> random.sample(range(10000), 10)[1817, 5551, 3549, 8889, 750, 265, 5890, 7658, 4068, 1249]>>> random.sample(range(100,1000), 12)[786, 280, 897, 970, 767, ...