Write contents of memory/DataFrame into text file

Write Contents of Memory/DataFrame into Text File
- Python for Integrated Circuits -
- An Online Book -

Python for Integrated Circuits http://www.globalsino.com/ICs/

Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix

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Write contents, stored in memory, into a text file, without erasing the original contents in the file: code:
          Web scraping
Output:

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Copy and paste text in different ways, and then save the text contents into a txt file: code:
          Replace a letter by seek
     Output:

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