Install Python to run speedtest-cli on android phone with no access to device - via adb I want to install python on an  android phone (the phone is connected to a pi so I don't have any GUI or physical access to the device). I can connect to the phone via adb shell and run/install packages via apk files easily. I want to install python on the device so that I can run speedtest-cli remotely via adb shell. https://github.com/sivel/speedtest-cli
Speedtest-cli requires python. So far I have tried the following based on online articles. 
1. Installed termux app via APK. I can access the underlying files remotely. I tried install python using pkg command but could not error below. 

1|:/data/data/com.termux/files/usr/bin # ./pkg install python                                                                                                                                               
This must NOT be run as root as it will break your environment (root will be required for nearly everything due to changed file permissions)
1|marlin:/data/data/com.termux/files/usr/bin # whoami
root


2. Installed Qpython on the device using adb. However the issue is that when I launch adb command to launch Qpython I see a prompt on the device - Allow Qpython to access media Options - Accept or Deny. Since I don't have access to device I can select either of the options. Is there a way to send command via ADB to select - Accept ?

Would appreciate any other ideas as well. My end goal is to run the speetest-cli utility via adb shell on a device that is not physcially accessible.
Solved this eventually. Here is what I did - 


Installed termux via downloading apk and performing adb install com.termux.apk
Remotely launched the termux app via adb  (monkey) (this is needed to complete install on the device) monkey -p com.termux -c android.intent.category.LAUNCHER
once termux is installed I installed python and speedtest-cli on the device using adb input text and keyevents - 


adb input text "pkg install python"
adb input keyevent "66"
adb input text "pip install speedtest-cli"

Then navigate to /data/data/com.termux/files/usr/bin
here you should have the speedtest-cli script that you can invoke from adb shell

/data/data/com.termux/files/usr/bin # ./speedtest-cli
Retrieving speedtest.net configuration...
Testing from XXXXX
Testing download speed................................................................................
Download: 20.18 Mbit/s
Testing upload speed......................................................................................................
Upload: 3.98 Mbit/s