这是我的代码:
def parse_args():
parser = argparse.ArgumentParser(description='Simple training script for object detection from a CSV file.')
parser.add_argument('csv_path', help='Path to CSV file')
parser.add_argument('--weights', help='Weights to use for initialization (defaults to ImageNet).', default='imagenet')
parser.add_argument('--batch-size', help='Size of the batches.', default=1, type=int)
return parser.parse_args()
当我运行我的代码时,出现错误:
usage: Train.py [-h] [--weights WEIGHTS] [--batch-size BATCH_SIZE] csv_path
Train.py: error: too few arguments
知道我哪里出错了吗?
答案 0 :(得分:1)
第一个arg csv_path
是必需的(你没有提供一些默认值),所以你需要将它传递给你的命令行,如下所示:
python Train.py some_file.csv # or the path to your file if it's not in the same directory
答案 1 :(得分:0)
这是因为您没有在nargs
每个标志之后指定预期的参数数量:
import argparse
def parse_args():
parser = argparse.ArgumentParser(description='Simple training script for object detection from a CSV file.')
parser.add_argument('csv_path', nargs="?", type=str, help='Path to CSV file')
parser.add_argument('--weights', nargs="?", help='Weights to use for initialization (defaults to ImageNet).', default='imagenet')
parser.add_argument('--batch-size', nargs="?", help='Size of the batches.', default=1, type=int)
return parser.parse_args()
parse_args()
根据文件:
If the nargs keyword argument is not provided, the number of arguments consumed is determined by the action. Generally this means a single command-line argument will be consumed and a single item (not a list) will be produced.
'?'. One argument will be consumed from the command line if possible, and produced as a single item. If no command-line argument is present, the value from default will be produced. Note that for optional arguments, there is an additional case - the option string is present but not followed by a command-line argument. In this case the value from const will be produced. Some examples to illustrate this:
详情here
答案 2 :(得分:0)
尝试一下:
import argparse
import sys
import csv
parser = argparse.ArgumentParser()
parser.add_argument('--file', default='fileName.csv')
args = parser.parse_args()
csvdata = open(args.file, 'rb')