To get rid of this error you can try using Python file exists methods to check that at least python sees the file exists or not. In other words, you can make sure that the user has indeed typed a correct path for a real existing file. If the user does not pass the full path to the file, the path is interpreted relatively to the current working directory. The current working directory usually is the directory in which you started the program. You have three options: Use an absolute path to open the file. Generate the path to the file relative to your python script. Change the current working directory before opening the file ... View more

The error message invalid literal for int() with base 10 would seem to indicate that you are passing a string that's not an integer to the int() function . In other words it's either empty, or has a character in it other than a digit. You can solve this error by using Python isdigit() method to check whether the value is number or not. The returns True if all the characters are digits, otherwise False . if val.isdigit(): The other way to overcome this issue is to wrap your code inside a Python try...except block to handle this error. Python2.x and Python3.x Sometimes the difference between Python2.x and Python3.x that leads to this ValueError: invalid literal for int() with base 10 . With Python2.x , int(str(3/2)) gives you "1". With Python3.x , the same gives you ("1.5"): ValueError: invalid literal for int() with base 10: "1.5". ... View more