Convert data elements from pandas to tuple

I have a dataframe: >>> df = pd.DataFrame(np.random.random((3,3))) >>> df 0 1 2 0 0.732993 0.611314 0.485260 1 0.935140 0.153149 0.065653 2 0.392037 0.797568 0.662104 What is the easiest way for me convert each entry to a 2-tuple, with f

Function does not print the desired output

I am having issues with creating a function that takes a list of tuples and then returns one string which is the first character of each tuple. Below is my current code, but nothing it happening, I do not get a syntax error. Any help would be appreci

Scala: why does it work foo (1,2) and foo ((1,2))?

Say I have a Scala function : def func(x:(Int,Int)):Int = x._1 + x._2 func((1,2)) // This works as expected But how come below function call also works correctly? func(1,2) I know about function call being turned to object with apply methods but I am

Generate a list of random weighted tuples from a list

Given a tuple list a: a =[(23, 11), (10, 16), (13, 11), (12, 3), (4, 15), (10, 16), (10, 16)] We can count how many appearances of each tuple we have using Counter: >>> from collections import Counter >>> b = Counter(a) >>> b Co

Other ways to declare arrays in TypeScript

My Typescript file will compile with either of these declarations. Are they equivalent? Is there a name for these ways of declaring arrays? interface Foo { bounds: number[][]; bounds2: [[number, number], [number, number]]; } The library into which I'

The most pythonic way of 'or' tuples?

I have a method that returns a three element tuple of boolean values and I call it on a loop. I want to finally get a three element tuple containing the or result of the individual tuples. If the method only returned a boolean it would just be: resul

Compare two lists / tuples (nested) of NumPy tables

Let us say I have two nested structures of the following kind: [(array, (array, array, array)), (array, (array, array, array))] All of the interesting data inside are NumPy arrays. What is the easiest way to compare two of such data structures? I cou

How to merge and convert tuples list into Dict

I have two lists of tuples. One list has unique elements the other does not. I need to merge and convert them. See example below: non_unique = [('A',2), ('B',3), ('C',4), ('D',5), ('E',6), ('A',8), ('C', 5), ('E',1) ] unique = [('A',5), ('B',4), ('C'

Only select the dictionary keys that are tuples?

I have a dictionary with both string and 2-tuple keys. I want to convert all the 2-tuple keys from (x,y) to strings that are x:y. Here is my data: In [4]: data = {('category1', 'category2'): {'numeric_float1': {('Green', 'Car'): 0.51376354561039017,(

Tuples in a dictionary

This question already has an answer here: Python dictionary, how to keep keys/values in same order as declared? 10 answers for the list of tuples below: x= [('a',1),('b', 2)] I want to convert it to: x_1 = {'a' : 1, 'b': 2} if i use dict(x), the dict

how is a tuple different from a class?

how is a tuple different from a class? instead of the following code, we can make a class with 3 fields and make objects from it. How is this Tuple different from that? Is it only reducing the code we write or does it have something to do with speed

Python: subclasses and operators

I am subclassing tuple. I want to override the equal method. It doesn't seem to be working. This is my minimum working example: class OPS(tuple): def __new__(self, data): self=tuple(data) return self def __eq__(A,B): print 'Hi' return True O1=OPS([1,

How to use a previously generated tuple to generate a new tuple

I was wondering if someone could help me figure out how to generate a new tuple with a previously generated tuple. What I have so far is just generating an empty tuple import math as m grav = 9.807 #[m/s**2] gravity http://physics.nist.gov/cgi-bin/cu

Read from the file and put the data into a tuple for a database

So I need to input information about employees into different strings or a tuple from a file. The format is known so I can extract them and know which order the variables need to be used but I need to split each string into each 5 different items int

How to get the position of a tuple element

For example, I have a tuple std::tuple<int, int, int, int> a(2, 3, 1, 4); and I want to get the position of its elements using such as the the following function. int GetPosition(const std::tuple<int, int, int, int>& tp, int element); Here

Generate Haskell random tuples

I was wondering if it's possible to generate random tuples with a code like: take 4 $ randomRs ((0,0),(70,100)) $ mkStdGen x :: [(Double,Double)] when I try this one I get the error: No instance for (Random (Float, Float)) arising from a use of 'rand

How to print elements in a list in new lines?

I have a list L = Counter(mywords) Where mywords = ['Well', 'Jim', 'opportunity', 'I', 'Governor', 'University', 'Denver', 'hospitality', 'There', 'lot', 'points', 'I', 'make', 'tonight', 'important', '20', 'years', 'ago', 'I', 'luckiest', 'man', 'ea

Why is tuple faster than the list?

I've just read in "Dive into Python" that "tuples are faster than lists". Tuple is immutable, and list is mutable, but I don't quite understand why tuple is faster. Anyone did a performance test on this?The reported "speed of cons

Sorting in java for tuples

I am building a class that has a mapping of strings to integers. So if I have 3 apples I would have a mapping of apples to 3. I need to write a class that sorts the name of the objects by decreasing numbers. So if I have (apples, 3) (oranges, 2) (ban