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import os
# 注意: os.system的命令不会保留,所以必须一次执行完全部命令。如第一句是cd xxx,第二句python xxx.py,必须写在一句话里,否则第一句执行完程序不会真的进入文件夹等待第二句
# 返回值正常是0,可用于检测
# 如下实例:
# status=os.system('cd ~/ev/yolo-master/keras-yolo3 && python yolo.py')
# ---------简单例子-------------
cmd1 = 'ls'
cmd2 = 'cd /py/pic && ls'
cmd3 = 'cd /py && python '
os.system(cmd2)
# ---------带变量传入-------------
# 使用格式化方法format(想了好久,发现这样可行!)将一个文件目录下的文件移到另一个目录
xml_src = r'/py/R2CNN-tensorflow/data/VOCdevkit/VOCdevkit_train/clip/aug/xml_src'
xml_dst = r'/py/R2CNN-tensorflow/data/VOCdevkit/VOCdevkit_train/clip/aug/xml_dst'
os.system('cp -r {} {}'.format(xml_src+'/* ',xml_dst)) # 注意src需要加'/*',如果只移动src的图片,则/*.jpg
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