generator

问题 I'm trying to provide a unified interface for retrieving all files from a single directory or a list of directories. def get_files(dir_or_dirs): def helper(indir): file_list = glob.glob("*.txt") for file in file_list: yield file if type(dir_or_dirs) is list: # a list of source dirs for dir in dir_or_dirs: yield helper(dir) else: # a single source dir yield helper(dir_or_dirs) def print_all_files(file_iter): for file in file_iter: print(file) # error here! Questions: The error says 'file' is

问题 This question already has answers here : Understanding generators in Python (12 answers) Closed 2 years ago . Once I use a generator once, it can't be used again. Why is this? Consider the following code: def generator(n): a = 1 for _ in range(n): yield a a += 1 def run_generator(generator): for a in generator: print(a, end = " ") If I were to execute this: count_generator = generator(10) run_generator(count_generator) run_generator(count_generator) It would only print: 1 2 3 4 5 6 7 8 9 10

问题 This question already has answers here : Understanding generators in Python (12 answers) Closed 2 years ago . Once I use a generator once, it can't be used again. Why is this? Consider the following code: def generator(n): a = 1 for _ in range(n): yield a a += 1 def run_generator(generator): for a in generator: print(a, end = " ") If I were to execute this: count_generator = generator(10) run_generator(count_generator) run_generator(count_generator) It would only print: 1 2 3 4 5 6 7 8 9 10

来源： https://stackoverflow.com/questions/63584973/how-to-use-numpy-memmap-inside-keras-generator-to-not-exceed-ram-memory

来源： https://stackoverflow.com/questions/53248099/keras-image-segmentation-using-grayscale-masks-and-imagedatagenerator-class

来源： https://stackoverflow.com/questions/45723893/how-does-a-generator-function-work-internally

来源： https://stackoverflow.com/questions/45723893/how-does-a-generator-function-work-internally

来源： https://stackoverflow.com/questions/31229853/what-is-the-best-way-to-sum-arrays-using-ecmascript-6-generator-functions

来源： https://stackoverflow.com/questions/31229853/what-is-the-best-way-to-sum-arrays-using-ecmascript-6-generator-functions

来源： https://stackoverflow.com/questions/64288667/given-n-generators-is-it-possible-to-create-a-generator-that-runs-them-in-paral