tuples

问题 This question already has answers here : Call int() function on every list element? (7 answers) Closed 4 years ago . I have this: blah = random.randint(int(minmax[0]), int(minmax[1])) I know this is possible: minimum, maximum = int(minmax[0]), int(minmax[1]) blah = random.randint(minimum, maximum) Can I do this second one in a single line using tuple-argument expansion? For example, if minmax was a tuple of integers to begin with, I could do: blah = random.randint(*minmax) But I don't have a

问题 This question already has answers here : Call int() function on every list element? (7 answers) Closed 4 years ago . I have this: blah = random.randint(int(minmax[0]), int(minmax[1])) I know this is possible: minimum, maximum = int(minmax[0]), int(minmax[1]) blah = random.randint(minimum, maximum) Can I do this second one in a single line using tuple-argument expansion? For example, if minmax was a tuple of integers to begin with, I could do: blah = random.randint(*minmax) But I don't have a

问题 This question already has answers here : Call int() function on every list element? (7 answers) Closed 4 years ago . I have this: blah = random.randint(int(minmax[0]), int(minmax[1])) I know this is possible: minimum, maximum = int(minmax[0]), int(minmax[1]) blah = random.randint(minimum, maximum) Can I do this second one in a single line using tuple-argument expansion? For example, if minmax was a tuple of integers to begin with, I could do: blah = random.randint(*minmax) But I don't have a

问题 This question already has answers here : Call int() function on every list element? (7 answers) Closed 4 years ago . I have this: blah = random.randint(int(minmax[0]), int(minmax[1])) I know this is possible: minimum, maximum = int(minmax[0]), int(minmax[1]) blah = random.randint(minimum, maximum) Can I do this second one in a single line using tuple-argument expansion? For example, if minmax was a tuple of integers to begin with, I could do: blah = random.randint(*minmax) But I don't have a

问题 I'm getting a data set that's formatted as a list of key-value pairs. The key is the data source, and the value is the data element. For example: [('a', 3), ('b', 5), ('a', 7), ('c', 15), ('d', 12)] I want to turn this list into a dictionary. I could use Python's built-in dict() , but it throws away redundant values and keeps only the last value associated with a given key. I would like redundant values to go into a list, as follows: {'a': [3, 7], 'b': [5], 'c': [15], 'd': [12]} Is there a

问题 I have an array of tuples loaded from a csv file using np.genfromtxt() function. import numpy as np import re from matplotlib.dates import strpdate2num def convert_string_to_bigint(x): p = re.compile(r'(\d{4})/(\d{1,2})/(\d{1,2}) (\d{1,2}):(\d{2}):\d{2}') m = p.findall(x) l = list(m[0]) l[1] = ('0' + l[1])[-2:] l[2] = ('0' + l[2])[-2:] return long("".join(l)) #print convert_string_to_bigint("2012/7/2 14:07:00") csv = np.genfromtxt ('sr00-1min.txt', delimiter=',', converters={0:convert_string

问题 How can it be done in most simply way to write (or maybe there is something embedded in haskell) function which takse as arguments list of tuples (String, Int) and Int x and return top x tuples as list according to x value. I wonder if its possible to write a function which also takes 3 argument which is the name of (or index) of filed in tuple according to which sorting has to be done. What are best solutions to make it quite generic? 回答1: take x $ sortBy (compare `on` fst) [("asd", 1), ...]

问题 How can it be done in most simply way to write (or maybe there is something embedded in haskell) function which takse as arguments list of tuples (String, Int) and Int x and return top x tuples as list according to x value. I wonder if its possible to write a function which also takes 3 argument which is the name of (or index) of filed in tuple according to which sorting has to be done. What are best solutions to make it quite generic? 回答1: take x $ sortBy (compare `on` fst) [("asd", 1), ...]

问题 I'm developing a composable functional UI library in F#, and I ran into a situation where I need to be able to create "collections" of items of heterogenous types. I don't want to accomplish this by resorting to dynamic programming and casting everything to obj (technically possible here, esp. since I'm compiling with Fable). Instead I want to retain as much type safety as possible. The solution I came up with is to create a simple custom operator %%% that builds tuples and then use it as

问题 I create my Tuple and add it to a combo box: comboBox1.Items.Add(new Tuple<string, string>(service, method)); Now I wish to cast the item as a Tuple, but this does not work: Tuple<string, string> selectedTuple = Tuple<string, string>(comboBox1.SelectedItem); How can I accomplish this? 回答1: Don't forget the () when you cast: Tuple<string, string> selectedTuple = (Tuple<string, string>)comboBox1.SelectedItem; 回答2: Your syntax is wrong. It should be: Tuple<string, string> selectedTuple = (Tuple