io file objects

''' io_StringIO1.py
io.StringIO from module io allows a string to be treated like a file

for images use io.BytesIO()
'''

import io

# unicode u needed for Python273
text = u"abcdefghijklmnopqrstuvwxyz"

# convert to a text file stream
tf = io.StringIO(text)
print(tf.read())  # abcdefghijklmnopqrstuvwxyz

tf.seek(10)
print(tf.read())  # klmnopqrstuvwxyz

tf.seek(20)
print(tf.read())  # uvwxyz

# set to the beginning of the stream
tf.seek(0)
# tell position
print(tf.tell())  # 0
# read the first 10 characters
print(tf.read(10))  # abcdefghij

print(tf.tell())  # 10
# read the next 10 characters
print(tf.read(10))  # klmnopqrst