4.1 File Handling

4.2 Opening a Data File

4.3 Closing a Data File

4.4 Program to Implement Opening and Closing

4.5 Read Operation on a Data File

4.6 Writing and Appending Data File

4.7 Read Function Program

4.8 Writing and Appending Program

4.9 Flush Function

4.10 Standard Input,Output and Error Stream

4.11 Absolute and Relative Path

4.12 Read and Write a Binary File

4.13 Pickle Module

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