table of Contents
Difference between the two .input and raw_input of
1. When the input is purely numeric
2. When the input character string to an expression
The principle function of three .input
I. Introduction
python 2.x versions have built-in functions raw_input and input two functions;
python 3.x version is not built-in functions raw_input, if you use the built-in functions raw_input in python 3.x version, you will be prompted: NameError: name 'raw_input' is not defined
Difference between the two .input and raw_input of
1. When the input is purely numeric
input returns numeric types, such as int, float
raw_inpout returns a string type, string type
2. When the input character string to an expression
input will be calculated numeric expression in the string, and raw_input does not.
The input "57 + 3": input will be an integer of 60; raw_input will be the string "3 + 57";
The principle function of three .input
Look python input document, you can see input by raw_input actually achieved, the principle is very simple, the following line of code:
def input(prompt):
return (eval(raw_input(prompt)))
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