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File I/O, Exception, Assertion COL 100 - Introduction to Computer - PowerPoint PPT Presentation

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File I/O, Exception, Assertion COL 100 - Introduction to Computer Science Department of Computer Science and Engineering Indian Institute of Technology Delhi Reading and Writing Files It is a common task to read some input data file

File I/O, Exception, Assertion COL 100 - Introduction to Computer Science Department of Computer Science and Engineering Indian Institute of Technology Delhi
Reading and Writing Files It is a common task to • read some input data file • do some calculation/filtering/processing with the data • write some output data file with results Python distinguishes between • text files ('t') • binary files 'b') If we don’t specify the file type, Python assumes we mean text files.
Reading and Writing Files Writing a text file https://www.southampton.ac.uk/~fangohr/training/python/pdfs/Python-for-Computational-Science-and-Engineering.pdf
Reading and Writing Files Writing a text file https://www.southampton.ac.uk/~fangohr/training/python/pdfs/Python-for-Computational-Science-and-Engineering.pdf
Reading and Writing Files Reading a text file https://www.southampton.ac.uk/~fangohr/training/python/pdfs/Python-for-Computational-Science-and-Engineering.pdf
Reading and Writing Files Reading a text file https://www.southampton.ac.uk/~fangohr/training/python/pdfs/Python-for-Computational-Science-and-Engineering.pdf
Reading and Writing Files Exercise https://www.southampton.ac.uk/~fangohr/training/python/pdfs/Python-for-Computational-Science-and-Engineering.pdf
Reading and Writing Files Exercise https://www.southampton.ac.uk/~fangohr/training/python/pdfs/Python-for-Computational-Science-and-Engineering.pdf
Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Exceptions
Exceptions
Assertion • Want to be sure that assumptions on state of computation are as expected • use an assert statement to raise an exception • an example of good defensive programming
Assertion Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/
Assertion Source:https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-0001-introduction-to-computer-science-and- programming-in-python-fall-2016/lecture-slides-code/

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