1、安装py2app首先安装一个gui框架 wxpython安装:pip install py2app2、打包app比如一个简单的gui,hello.py!/usr/bin/env pythonimport wxapp = wx.App(False) # Create a new app, don't redirect stdout/stderr to a window.frame = wx.Frame(None, wx.ID_ANY, "Hello World") # A Frame is a top-level wind...
回答于 2022-04-18 09:08
首先,新建一个空列表。info = []然后新建字典student = {"Chinese":99,"Math":129,"English":145}接着用list.append() 方法将存储学生成绩的字典添加到列表中info.append(student)
回答于 2022-04-18 09:06
1、使用ipad进入python官网2、点击Download>Windows,点击“Windowsx86-64executable”进行下载3、下载完之后,双击进行安装。
回答于 2022-04-18 09:04
使用cv2库,用这种方法的好处是返回的就是arrary,不用转换,但是从头读到尾。import numpy as npimport matplotlib.pyplot as pltimport pylabimport imageioimport skimage.ioimport numpy as np import cv2 cap = cv2.VideoCapture('/path/to/your/video.mp4') while(cap.isOpened()): ret, frame = cap.read(...
回答于 2022-04-18 09:02
可以;import pylabimport imageio#视频的绝对路径filename = '/path/to/your/video.mp4'#可以选择解码工具vid = imageio.get_reader(filename, 'ffmpeg')for im in enumerate(vid): #image的类型是mageio.core.util.Image可用下面这一注释行转换为arrary #image = skimage.img_as_float(im).astype(np.float32) ...
回答于 2022-04-18 09:00
from turtle import *fillcolor("red")begin_fill()while True: forward(200) right(144) if abs(pos()) < 1: breakend_fill()结果:
回答于 2022-04-18 08:58
使用open函数打开文件,再用read函数将文件里的数据读取出来并存放到列表中,用for循环语句遍历列表,使用str函数将数字转换成字符串,用if语句判断字符串中是否含有负号,如果是,则输出这个数。
回答于 2022-04-17 18:44
#!usr/bin/env python#encoding:utf-8 def strReverse(strDemo): strList=list(strDemo) if len(strList)==0 or len(strList)==1: return strList i=0 length=len(strList) while i < length/2: strList[i], strList[length-i-1]=strList[length-i-1], strList[i] i+=1 return ''.join(strList)print(s...
回答于 2022-04-17 18:42
#!usr/bin/env python# encoding:utf-8def strReverse(strDemo): if len(strDemo)<=1: return strDemo return strDemo[-1]+strReverse(strDemo[:-1])print(strReverse('qbitschool.cn'))
回答于 2022-04-17 18:41
#!usr/bin/env python# encoding:utf-8import collectionsdef strReverse(strDemo): deque1=collections.deque(strDemo) deque2=collections.deque() for tmpChar in deque1: deque2.extendleft(tmpChar) return ''.join(deque2)print(strReverse('qbitschool.cn'))
回答于 2022-04-17 18:40