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Add file read write demo (I/O)
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‎FilesIO/.project

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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>FilesIO</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.python.pydev.PyDevBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.python.pydev.pythonNature</nature>
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</natures>
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</projectDescription>

‎FilesIO/.pydevproject

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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<?eclipse-pydev version="1.0"?><pydev_project>
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<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
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<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 3.6</pydev_property>
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<pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
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<path>/${PROJECT_DIR_NAME}/src</path>
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</pydev_pathproperty>
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</pydev_project>

‎FilesIO/src/ants.jpg

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‎FilesIO/src/filesio.py

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'''
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Created on Aug 8, 2017
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@author: Aditya
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This program demonstrates the python IO capabilities.
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File reading and writing for text and binary files are demonstrated.
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'''
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def readfiledemo():
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f = open('smallfile.txt')
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for line in f:
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print(line, end='')
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def readwritefiledemo():
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fin = open('smallfile.txt', 'r')
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fout = open('demofile1.txt', 'w')
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for line in fin:
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print(line, file = fout, end = '')
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def bigfiledemo():
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fin= open('largefile.txt','r')
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fout = open('demofile2.txt','w') # open demofile to wite
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buffersize = 50000 # buffer size in bytes
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buffer = fin.read(buffersize)
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print('Read method on file handle object is not iterable. Therefore, using while-loop and not for-loop.')
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while len(buffer):
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fout.write(buffer)
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print('.', end='')
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buffer = fin.read(buffersize)
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print('\nDone writing the big file.')
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def readwritebinaryfilesdemo():
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fin = open('ants.jpg','rb') # read binary
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fout = open('demo.jpg','wb') # write binary
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buffersize = 50000 # buffer in bytes
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buffer = fin.read(buffersize)
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print('Note: Image read in binary format.')
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print(buffer)
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while len(buffer):
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fout.write(buffer)
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print('.',end='')
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buffer = fin.read(buffersize)
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print('\nDone writing the image.')
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def main():
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#writebigfile()
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readwritebinaryfilesdemo()
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readfiledemo()
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readwritefiledemo()
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bigfiledemo()
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def writebigfile():
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f = open('largefile.txt', 'w')
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for i in range(10000):
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print('{:05} Yo the big file of the Files'.format(i), file=f)
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print('Done writing.')
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if __name__ == '__main__':main()

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