How to print a message or the error if a file is not found

Question

 Can you let me know in case I would like to put a check condition for a file, in case the file is not available it should print "file is not available, please upload the file". How can I do this?

Answer 1

To print the message that file is not found, use try-except block.

Refer below sample code. 
 

filename="C:/Users/Desktop/123456.txt"
try:
   open(filename, 'r')
except OSError as e:
   print("File " + filename + "is not available, please upload the file.")