--snip-- # Loop through all 50 states, making a question for each. for questionNum in range(50): --snip-- # Write the question and the answer options to the quiz file. quizFile.write(f'{questionNum + 1}. What is the capital of {states[questionNum]}?\n') for i in range(4)...
When you run a command likepythonorpip, your shell (bash / zshrc / ...) searches through a list of directories to find an executable file with that name. This list of directories lives in an environment variable calledPATH, with each directory in the list separated by a colon: /usr/loc...
# TODO: Loop through all the pages (except the first) and add them. # TODO: Save the resulting PDF to a file. 在Shebang 行和关于程序功能的描述性注释之后,这段代码导入了os和PyPDF2模块➊。这个os.listdir('.')调用将返回当前工作目录中所有文件的列表。代码遍历这个列表,只添加那些带有pdf扩展...
basemap基于matplotlib开发，所以它具有创建数据可视化的所有功能，必须配合matplotlib使用。只需要几行代码就...
file = open('example.txt', 'r') data = file.read() print(data) Reading a File Line-By-Line Sometimes, you may want to read a file line-by-line. To do that, you can use aforloop to loop through the file line-by-line. The following code demonstrates how to read a file line-...
### Loop through all jpg files in the current folder ### Resize each one to size 600x600 for image_filename in glob.glob("*.jpg"): ### Read in the image data img = cv2.imread(image_filename) ### Resize the image img = cv2.resize(img, (600, 600)) ...
>>> outputFile.close() 首先调用open()并传递'w'以写模式打开一个文件 ➊。这将创建一个对象,然后你可以传递给csv.writer()➋ 来创建一个writer对象。 在Windows 上,您还需要为open()函数的newline关键字参数传递一个空字符串。由于超出本书范围的技术原因,如果你忘记设置newline参数,那么output.csv中的...
FileNotFoundError: [WinError2] The system cannot find the file specified:'C:/ThisFolderDoesNotExist' 没有改变工作目录的pathlib函数,因为在程序运行时改变当前工作目录往往会导致细微的 bug。 os.getcwd()函数是以字符串形式获取当前工作目录的老方法。
SETUP_LOOP用于开始一个循环。SETUP_LOOP 25 (to 28)中28表示循环退出点 GET_ITER 表示开始迭代 FOR_ITER 表示继续iter开始下一个 8、if POP_JUMP_IF_FALSE和JUMP_FORWARD一般用于分支判断跳转。POP_JUMP_IF_FALSE表示条件结果为FALSE就跳转到目标偏移指令。JUMP_FORWARD直接跳转到目标偏移指令。
lsls是一个列表,遍历每个元素，产生循环ls is a list that iterates through each element, producing a loop文件遍历循环（The file traverses the loop）：for line in fi :fi是一个文件标识符，遍历其每行，产生循环fi is a file identifier that iterates through each of its lines, producing a loop2...