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What does [:-1] mean/do in python? - Stack Overflow
Working on a python assignment and was curious as to what [:-1] means in the context of the following code: instructions = f.readline()[:-1] Have searched on here on S.O. and on Google but to no avail. Would love an explanation!
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Python Slicing – How to Slice an Array and What Does [::-1] Mean?
We also accessed the second value by using square brackets and its index in the order, which is 1. How to Slice an Array in Python Let's say you want to slice a portion of this array and assign the slice to another variable. You can do it using colons and square ...
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Welcome to Python.org
2025-05-07 Python 3.14.0 beta 1 is here! 2025-05-06 Announcing Python Software Foundation Fellow Members for Q1 2025! 🎉 2025-05-01 A thank you to the Oregon State University Open Source Lab 2025-05-01 Python Software Foundation Names New Deputy
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3. Python 速览 — Python 3.15.0a0 文档
3.1. Python 用作计算器 现在,尝试一些简单的 Python 命令。启动解释器,等待主提示符( >>> )出现。 3.1.1. 数字 解释器像一个简单的计算器:你可以输入一个表达式,它将给出结果值。 表达式语法很直观:运算符 +, -, * 和 / 可被用来执行算术运算;圆括号 (()) 可被用来进行分组。