Create readme.md

Author: vamsikrishnarh7

PDF Merger App/readme.md

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+**PDF Merger APP**
+<hr>
+
+**Features**
+
+In this app, the user will be able to do following:
+
+- open the PDF files ( can merge numerous files)
+- save the merged file in custom location and custom name
+
+
+**Approach**
+
+This app build using `tkinter 3.9.14` and `PyPDF 2.12.1`.
+- Import the PyPDF2 and tkinter modules.
+- Open the PDF files.
+- Use PdfFileReader() to read the PDF.
+- use PdfFileWriter() and addPage() to merge the PDF files.
+
+**Demonstration**
+
+PDF 1 as input :
+![PDF file](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/pdf1.png)
+
+PDF 2 as input :
+![PDF file](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/pdf2.png)
+
+Merged PDF : 
+
+![pdf file](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/merged.png)
+
+The GUI looks like below :
+
+![gui](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/pic%201.png)
+
+Select the PDF files :
+![select_pdfs](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/pic%202.png)
+
+
+![merged_pdf](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/pic%203.png)
+
+Give the name to the merged PDF file :
+![merged_pdf](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/pic%204.png)
+
+Result :
+
+![result](https://github.com/vamsikrishnarh7/Play-With-Python/blob/main/PDF%20Merger%20App/images/pic%205.png)
+
+[**Durga Vamsi Krishna**](https://github.com/vamsikrishnarh7/)