[FIXED] Change Python interactive prompt ">>>"

Issue

I recall reading, in the Python 3.5 docs, how to change the >>> on the Python interactive prompt, such as how calling help() will change it to help>.

But for some reason, when I've gone back to try and remember, I just can't find the instructions to it. Does anyone know if this is possible?

Solution

You remember correctly.

It's in the sys module (sys.ps1 & sys.ps2):

Strings specifying the primary and secondary prompt of the interpreter. These are only defined if the interpreter is in interactive mode. Their initial values in this case are '>>> ' and '... '. If a non-string object is assigned to either variable, its str() is re-evaluated each time the interpreter prepares to read a new interactive command; this can be used to implement a dynamic prompt.

For example:

   >>> import sys
   >>> sys.ps1 = "3.5>>> "
   3.5>>> sys.ps2 = "3.5... "
   3.5>>>

Answered By - Gerrat