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Addendum to Module 10: Tracing File Operations

Addendum to Module 10: Tracing File Operations. Topics: Tracing File input Tracing File output. Opening a File. f = file(“ myfile.txt”,”r ”). variable that refers to the file (file handle). filename. f = file(“ myfile.txt”,”w ”). Reading a File. my_input_file.txt. John Phillips

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Addendum to Module 10: Tracing File Operations

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  1. Addendum to Module 10: Tracing File Operations Topics: Tracing File input Tracing File output 10: Addendum

  2. Opening a File f = file(“myfile.txt”,”r”) variable that refers to the file (file handle) filename f = file(“myfile.txt”,”w”) 10: Addendum

  3. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  4. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “John Phillips\n” lines = [] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  5. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “John Phillips\n” lines = [] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  6. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “John Phillips\n” lines = [] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  7. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “John Phillips\n” lines = [“John Phillips\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  8. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “Mary Beukeboom\n” lines = [“John Phillips\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  9. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “Mary Beukeboom\n” lines = [“John Phillips\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  10. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “Mary Beukeboom\n” lines = [“John Phillips\n”, “Mary Beukeboom\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  11. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “Eunsuk Kang\n” lines = [“John Phillips\n”, “Mary Beukeboom\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  12. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “Eunsuk Kang\n” lines = [“John Phillips\n”, “Mary Beukeboom\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  13. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “Eunsuk Kang\n” lines = [“John Phillips\n”, “Mary Beukeboom\n”, “Eunsuk Kang\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  14. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “” lines = [“John Phillips\n”, “Mary Beukeboom\n”, “Eunsuk Kang\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  15. Reading a File my_input_file.txt John Phillips Mary Beukeboom Eunsuk Kang next_str = “” lines = [“John Phillips\n”, “Mary Beukeboom\n”, “Eunsuk Kang\n”] lines = [] next_str = f.readline() while next_str != “”: lines.append(next_str) next_str = f.readline() next line to execute 10: Addendum

  16. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) next line to execute 10: Addendum

  17. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“John”, “Phillips”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) next line to execute 10: Addendum

  18. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“John”, “Phillips”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) John next line to execute 10: Addendum

  19. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“John”, “Phillips”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips next line to execute 10: Addendum

  20. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“John”, “Phillips”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips next line to execute 10: Addendum

  21. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Mary”, “Beukeboom”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips next line to execute 10: Addendum

  22. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Mary”, “Beukeboom”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips Mary next line to execute 10: Addendum

  23. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Mary”, “Beukeboom”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips MaryBeukeboom next line to execute 10: Addendum

  24. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Mary”, “Beukeboom”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips MaryBeukeboom next line to execute 10: Addendum

  25. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Eunsuk”, “Kang”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips MaryBeukeboom next line to execute 10: Addendum

  26. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Eunsuk”, “Kang”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips MaryBeukeboom Eunsuk next line to execute 10: Addendum

  27. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Eunsuk”, “Kang”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips MaryBeukeboom EunsukKang next line to execute 10: Addendum

  28. Writing a File my_output_file.txt names = [[“John”, “Phillips”], [“Mary”, “Beukeboom”], [“Eunsuk”,”Kang”]] n = [“Eunsuk”, “Kang”] for n in names: f.write(n[0]) f.write(n[1]) f.write(“\n”) JohnPhillips MaryBeukeboom EunsukKang next line to execute 10: Addendum

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