The openwrt router prompts when installing software:
ERROR: Could not install packages due to an EnvironmentError: [No space left on device
Use the following command to specify TMPDIR:
TMPDIR=/mnt/sdc1 pip install lxml
TMPDIR=/mnt/sdc1 is a relatively large storage space
Additional parameters can be added, such as:
TMPDIR=/folder/address/here/ pip install --upgrade --cache-dir=/folder/address/here/ --build /folder/address/here/ tensorflow