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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?
Here, we specify a start of index 2, no end, and a step of -1. Slicing here will start from index 2 which is 3. The negative steps mean the next value in the slice will be at an index smaller than the previous index by 1. This means 2 - 1 which is 1 so the value at this index, which is 2 will be added to the slice.
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Python Operators Cheat Sheet - LearnPython.com
Python Comparison Operators. Comparison operators are used to compare two values.They return a Boolean value (True or False) based on the comparison result.These operators are often used in conjunction with if/else statements in order to control the flow of a program. For example, the code block below allows the user to select an option from a menu:
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Python Operators - W3Schools
Sets each bit to 1 if both bits are 1: x & y: Try it » | OR: Sets each bit to 1 if one of two bits is 1: x | y: Try it » ^ XOR: Sets each bit to 1 if only one of two bits is 1: x ^ y: Try it » ~ NOT: Inverts all the bits ~x: Try it » << Zero fill left shift: Shift left by pushing zeros in from the right and let the leftmost bits fall off: x ...
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list - what does [::-1] mean in python - slicing? - Stack Overflow
Slicing. Negative numbers for start and stop mean "from the end". It's essianlly equivalent of len-value.; Negative number for step means "in reverse order".; Empty start means 0 i.e. 1st element. Empty stop means len.Stop parameter is exclusive!
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string - What does n [::-1] means in Python? - Stack Overflow
This is explained nicely in Understanding slice notation, in the Python docs under "extended slicing", and in this blogpost: Python Slice Examples: Start, Stop and Step Share Improve this answer
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Meaning of list[-1] in Python - Stack Overflow
So, if you wanted the last element in array, you would call array[-1]. All your return c.most_common()[-1] statement does is call c.most_common and return the last value in the resulting list, which would give you the least common item in that list. Essentially, this line is equivalent to: temp = c.most_common() return temp[len(temp) - 1]
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syntax - What does :-1 mean in python? - Stack Overflow
What does :-1 mean in python? [duplicate] Ask Question Asked 12 years, 4 months ago. Modified 2 years, 8 months ago. Viewed 162k times 33 . This question already has answers here: How slicing in Python works (38 answers) Closed 2 years ago. I'm trying to port some Python code to C, but I came across this line and I can't figure out what it ...
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What is the meaning of "int(a[::-1])" in Python? - Stack Overflow
Now the indexing here and also the step count, support negative numbers. So, if you give a -1 index, it translates to len(a)-1 index. And if you give -x as the step count, then it would step every x'th value from the start index, till the stop index in the reverse direction. For example. a = '1234' print a[3:0:-1] This would return . 432
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The += Operator In Python - A Complete Guide - AskPython
In this lesson, we will look at the += operator in Python and see how it works with several simple examples. The operator ‘+=’ is a shorthand for the addition assignment operator . It adds two values and assigns the sum to a variable (left operand).