How to read input in python

In Python, there are two ways to read input: The input() function accepts a prompt and returns a string entered by the user. The sys.stdin.readline() function reads a line of text (including newlines) from standard input and returns a string.

How to read input in Python

There are two main ways to read input in Python: input() function and <code>sys.stdin.readline()</code> function.

1. input() function

input() The function gets input from the user and returns it as a string. Its syntax is as follows:

<code>input(prompt="")</code>

where prompt is an optional prompt message that will be displayed when the user needs to input.

Example:

name = input("请输入您的姓名：")

2. sys.stdin.readline() function

sys.stdin. The readline() function reads a line of text (including newlines) from standard input and returns it as a string. Its syntax is as follows:

<code>sys.stdin.readline()</code>

Unlike the input() function, the <code>sys.stdin.readline()</code> function does not accept prompt messages.

Example:

import sys
name = sys.stdin.readline()

Select method

input() function is more suitable for prompting the user In the case of input, the <code>sys.stdin.readline()</code> function is more suitable for reading input from a script or other program.

Other Notes

• Input is always returned as a string, even if you expect it to be a number. If you need an integer or float, you need to cast it to the appropriate type:

age = int(input("请输入您的年龄："))

• To read from multiple lines of input, you can use lines = sys. stdin.readlines() function, which returns each line as a list as a string:

lines = sys.stdin.readlines()

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