Is there a Python function similar to the expand.grid() function in R ? Is there anything similar to R Medium expand.grid() Functional Python function ？Thanks in advance. Thank you in advance .
(EDIT) Below are the description of this R function and an example.（ edit ） Here's this R Function description and an example .
Create a Data Frame from All Combinations of FactorsDescription: Create a data frame from all combinations of the supplied vectors or factors. > x <- 1:3> y <- 1:3> expand.grid(x,y) Var1 Var21 1 12 2 13 3 14 1 25 2 26 3 27 1 38 2 39 3 3(EDIT2) Below is an example with the rpy package.(EDIT2) Here is a belt with rpy An example of a package .I would like to get the same output object but without using R : I want to get the same output object but don't use R ：
>>> from rpy import *>>> a = [1,2,3]>>> b = [5,7,9]>>> r.assign("a",a)[1, 2, 3]>>> r.assign("b",b)[5, 7, 9]>>> r("expand.grid(a,b)"){'Var1': [1, 2, 3, 1, 2, 3, 1, 2, 3], 'Var2': [5, 5, 5, 7, 7, 7, 9, 9, 9]}EDIT 02/09/2012: I'm really lost with Python. edit 02/09/2012： I'm really lost Python.Lev Levitsky's code given in his answer does not work for me:Lev Levitsky The code given in his answer doesn't work for me ：
>>> a = [1,2,3]>>> b = [5,7,9]>>> expandgrid(a, b)Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 2, in expandgridNameError: global name 'itertools' is not definedHowever the itertools module seems to be installed (typing from itertools import * does not return any error message) But it seems that itertools modular （ from itertools import * Input will not return any error messages ）
