io.StringIO and io.BytesIO

io.py

import io 
s = io.StringIO()
print(s.write("Hello World/n"))
# ------->Output: 13

# adding to the memory buffer using print statement
print("adding using the print",file = s)


# get all of the data written in the file
print(s.getvalue())
# ------>Output: Hello World/nadding using the print

# wrapping a file interface around a string
s = io.StringIO("Hello\nWorld\n")
print(s.readlines())
# ------>Output: ['Hello\n', 'World\n']

# StringIO class should be only used for strings




# if we are dealing with bytes we should use BytesIO
s = io.BytesIO()
s.write(b"This is a binary string")
print(s.getbuffer())
print(s.getvalue())