python3# stopwatch.py - A simple stopwatch program.import time# Display the program's instructions.print('Press ENTER to begin. Afterward, press ENTER to "click" the stopwatch.Press Ctrl-C to quit.')input() # press Enter to beginprint('Started.')startTime = time.time() # get the f...
random.seed(444)args=[1,2,3]iflen(sys.argv)==1elsemap(int,sys.argv[1:])start=time.perf_counter()asyncio.run(main(*args))end=time.perf_counter()-startprint(f"Program finished in {end:0.2f} seconds.") 注意观察输出,part1() 睡眠一段时间,part2() 在结果可用时开始处理它们: 代码语言...
数学常量 pi 数学常量 pi(圆周率,一般以π来表示) e 数学常量 e,e即自然常数(自然常数) (1)abs(x) 返回数字的绝对值,如abs(-10) 返回 10 (2)ceil(x) 返回数字的上入整数,如math.ceil(4.1) 返回 5 (3)exp(x) 返回e的x次幂(ex),如math.exp(1) 返回2.718281828459045 (4)fabs(x) 返回数字的绝...
res = system.ui.open_file_dialog("Choose multiple files:", filter="Text files (*.txt)|*.txt|Image Files(*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;*.GIF|All files (*.*)|*.*", filter_index = 0, multiselect=True) print("The user did choose: '%s'" % str(res)) # res是一个元组,...
SyntaxError: multiple statements found while compiling a single statement 这是因为整体复制过去运行而产生的错误;解决方案如下: 方法一:先将第一行复制,敲一下回车,再将剩下的部分复制过去,运行; 方法二:Ctrl+N,新建一个,这时直接将代码复制进来,就不会产生这个问题了;直接在IDLE中编译,是每行都要回车的。如...
Program # Python program to find the# maximum frequency character of the stringimportcollections# Getting string input from the usermyStr=input('Enter the string : ')# Finding the maximum frequency character of the stringfreq=freq=collections.Counter(myStr)maxFreqChar=max(freq,key=freq.get)# ...
find() 查找文本 paste() 向文本框中粘贴内容 redo() 重做 selectAll() 全选 selectedText() 获得选中的文本 setAlignment() 设置文本对齐方式 setText() 设置文本框中的文字 toPlainText() 获取文本框中的文字 undo() 撤销 3.文本浏览器QTextBrowser ...
Python can be interpreted one line at a time, which makes it easy to find mistakes or errors Python is highly versatile can be used for both small and complex tasks Python is used across multiple industries such as data science, software engineering, app development,...
Visual Studio uses pip to install any missing packages. Environment Optional Identifies a string of environment variables to define before running the command. Each variable uses the form \<NAME>=\<VALUE> with multiple variables separated by semicolons. A variable with multiple values must be ...
Select the entire contents of the current window选择当前窗口的全部内容。 Find...查找… Open a search dialog with many options打开包含许多选项的搜索对话框 Find Again再找一次 Repeat the last search, if there is one如果有,重复上一次搜索。