Adding Youtube_MP3_Audio_Download python file

Amazing Python Projects_Scripts/Youtube mp3 download/README.md

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+# Youtube MP3 Audio Download
+The ```Youtube_mp3_download.py``` is to convert youtube video format to mp3 format
+
+# Requirement
+Any system with python 3 (preferably 3.6 or higher) and terminal.
+
+# Usage
+- Navigate to the file directory where the downloaded file (the script file) is stored.
+- Run the file, using `python youtube_mp3_download.py <your youtube's url>` and run.
+- Wait for sometime, and Whola!! your youtube audio is downloaded.

Amazing Python Projects_Scripts/Youtube mp3 download/youtube_mp3_download.py

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+#This program is to convert youtube video format to mp3 format
+import youtube_dl
+import sys
+
+
+#to choose the best audio format available , the 'preffereddcode' will be mp3 and rest will be as it is 
+ydl_opts = {
+    'format': 'bestaudio/best' ,
+    'postprocessors': [{
+        'key': 'FFmpegExtractAudio',
+        'preferredcodec': 'mp3',
+        'preferredquality': '192',
+    }],
+}
+
+if __name__ == '__main__':
+    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+        filenames = sys.argv[1:]
+        ydl.download(filenames)
+
+#For output type python youtube mp3 download followed by <your youtube's url>