Error: No matching distribution found for io(from -r requirements.txt (line 5))

[GUNASEKHAR333]

i need to build an apk file for the a python program which uses the python module "io". so, i added "io" in the requirements section of buildozer.spec. while i ran the command "buildozer android debug deploy run", the errors raised are "could not find a version that satisfies the requirement io (from -r requirements.txt (line 5)) " and "No matching distribution found for io (from -r requirements.txt (line 5))".
please help me how to resolve this error.