diff options
Diffstat (limited to 'R')
| -rw-r--r-- | R/chent.R | 136 | ||||
| -rw-r--r-- | R/zzz.R | 13 |
2 files changed, 76 insertions, 73 deletions
@@ -1,4 +1,4 @@ -# Copyright (C) 2016-2019 Johannes Ranke +# Copyright (C) 2016-2021 Johannes Ranke # Contact: jranke@uni-bremen.de # This file is part of the R package chents @@ -19,7 +19,7 @@ #' #' The class is initialised with an identifier. Chemical information is retrieved from #' the internet. Additionally, it can be generated using RDKit if RDKit and its -#' python bindings are installed and configured for use with PythonInR. +#' python bindings are installed. #' #' @export #' @format An \code{\link{R6Class}} generator object @@ -33,8 +33,8 @@ #' @field smiles SMILES code, with attribute 'source' #' @field mw Molecular weight, with attribute 'source' #' @field pubchem List of information retreived from PubChem -#' @field rdkit List of information obtained with RDKit, if installed and -#' configured for use with PythonInR +#' @field rdkit List of information obtained with RDKit +#' @field mol <rdkit.Chem.rdchem.Mol> object #' @field svg SVG code #' @field Picture Graph as a \code{\link{picture}} object obtained using grImport #' @field Pict_font_size Font size as extracted from the intermediate PostScript file @@ -47,6 +47,18 @@ #' @field soil_sorption Dataframe of soil sorption data #' @field PUF Plant uptake factor #' @keywords data +#' @examples +#' oct <- chent$new("1-octanol", smiles = "CCCCCCCCO") +#' print(oct) +#' if (!is.null(oct$Picture)) { +#' plot(oct) +#' } +#' +#' caffeine <- chent$new("caffeine") +#' print(caffeine) +#' if (!is.null(caffeine$Picture)) { +#' plot(caffeine) +#' } chent <- R6Class("chent", public <- list( @@ -56,6 +68,7 @@ chent <- R6Class("chent", mw = NULL, pubchem = NULL, rdkit = NULL, + mol = NULL, svg = NULL, Picture = NULL, Pict_font_size = NULL, @@ -86,7 +99,7 @@ chent <- R6Class("chent", } if (rdkit) { - if(rdkit_available()) { + if(rdkit_available) { if (is.null(self$smiles)) { message("RDKit would need a SMILES code") } else { @@ -98,7 +111,7 @@ chent <- R6Class("chent", attr(self$mw, "source") <- "rdkit" } } else { - message("RDKit is not available via PythonInR") + message("RDKit is not available") } } @@ -158,13 +171,12 @@ chent <- R6Class("chent", } }, get_rdkit = function(template = NULL) { - if(!rdkit_available()) { - stop("RDKit is not available via PythonInR") + if(!rdkit_available) { + stop("RDKit is not available") } self$rdkit <- list() - PythonInR::pyImport("Descriptors", from = "rdkit.Chem") - PythonInR::pyExec(paste0("mol = Chem.MolFromSmiles('", self$smiles[1], "')")) - self$rdkit$mw <- PythonInR::pyExecg("mw = Descriptors.MolWt(mol)", "mw") + self$mol <- rdkit_module$Chem$MolFromSmiles(self$smiles[1]) + self$rdkit$mw <- rdkit_module$Chem$Descriptors$MolWt(self$mol) if (!is.null(self$mw)) { if (round(self$rdkit$mw, 1) != round(self$mw, 1)) { message("RDKit mw is ", self$rdkit$mw) @@ -173,20 +185,16 @@ chent <- R6Class("chent", } # Create an SVG representation - PythonInR::pyImport("Draw", from = "rdkit.Chem") - PythonInR::pyImport("rdMolDraw2D", from = "rdkit.Chem.Draw") - PythonInR::pyImport("rdDepictor", from = "rdkit.Chem") - PythonInR::pyExec("rdDepictor.Compute2DCoords(mol)") + rdkit_module$Chem$rdDepictor$Compute2DCoords(self$mol) if (!is.null(template)) { - PythonInR::pyImport("AllChem", from = "rdkit.Chem") - PythonInR::pyExec(paste0("template = Chem.MolFromSmiles('", template, "')")) - PythonInR::pyExec("AllChem.Compute2DCoords(template)") - PythonInR::pyExec("AllChem.GenerateDepictionMatching2DStructure(mol, template)") + rdkit_template <- rdkit_module$Chem$MolFromSmiles(template) + rdkit_module$Chem$rdDepictor$Compute2DCoords(template) + rdkit$Chem$AllChem$GenerateDepictionMatching2DStructure(self$mol, template) } - PythonInR::pyExec("d2d = rdMolDraw2D.MolDraw2DSVG(400,500)") - PythonInR::pyExec("d2d.DrawMolecule(mol)") - PythonInR::pyExec("d2d.FinishDrawing()") - self$svg <- PythonInR::pyGet("d2d.GetDrawingText()") + d2d <- rdkit_module$Chem$Draw$rdMolDraw2D$MolDraw2DSVG(400L, 400L) + d2d$DrawMolecule(self$mol) + d2d$FinishDrawing() + self$svg <- d2d$GetDrawingText() svgfile <- tempfile(fileext = ".svg") psfile <- tempfile(fileext = ".ps") writeLines(self$svg, svgfile) @@ -446,19 +454,14 @@ print.chent = function(x, ...) { draw_svg.chent = function(x, width = 300, height = 150, filename = paste0(names(x$identifier), ".svg"), subdir = "svg") { - if (!PythonInR::pyIsConnected()) { - PythonInR::pyConnect() - } - try_rdkit <- try(PythonInR::pyImport("Chem", from = "rdkit")) - if (inherits(try_rdkit, "try-error")) { - message("Could not import RDKit in Python session") + if (!rdkit_available) { + stop("RDkit is not available via reticulate") } else { if (!dir.exists(subdir)) dir.create(subdir) - PythonInR::pyExec(paste0("mol = Chem.MolFromSmiles('", x$smiles, "')")) - PythonInR::pyImport("Draw", from = "rdkit.Chem") - cmd <- paste0("Draw.MolToFile(mol, '", file.path(subdir, filename), - "', size = (", width, ", ", height, "))") - PythonInR::pyExec(cmd) + mol <- rdkit_module$Chem$MolFromSmiles(x$smiles) + + rdkit_module$Chem$Draw$MolToFile(mol, file.path(subdir, filename), + size = c(as.integer(width), as.integer(height))) } } @@ -482,19 +485,25 @@ plot.chent = function(x, ...) { #' @importFrom R6 R6Class #' @export #' @format An \code{\link{R6Class}} generator object -#' @field iso ISO common name according to ISO 1750 as retreived from www.alanwood.net/pesticides -#' @field alanwood List of information retreived from www.alanwood.net/pesticides +#' @field iso ISO common name according to ISO 1750 as retreived from pesticidecompendium.bcpc.org +#' @field bcpc List of information retrieved from pesticidecompendium.bcpc.org #' @keywords data +#' @examples +#' atr <- pai$new("atrazine") +#' print(atr) +#' if (!is.null(atr$Picture)) { +#' plot(atr) +#' } pai <- R6Class("pai", inherit = chent, public <- list( iso = NULL, - alanwood = NULL, + bcpc = NULL, initialize = function(iso, identifier = iso, smiles = NULL, smiles_source = 'user', inchikey = NULL, inchikey_source = 'user', - alanwood = TRUE, + bcpc = TRUE, pubchem = TRUE, pubchem_from = 'auto', rdkit = TRUE, template = NULL, chyaml = TRUE) @@ -505,28 +514,28 @@ pai <- R6Class("pai", attr(self$inchikey, "source") <- "user" } - if (!missing(iso) & alanwood) { - message("alanwood.net:") - aw_result = webchem::aw_query(identifier, from = "name") + if (!missing(iso) & bcpc) { + message("BCPC:") + bcpc_result = webchem::bcpc_query(identifier, from = "name") # Use first element of list, as we passed a query of length one - if (is.na(aw_result[[1]][1])) { - message("Common name ", identifier, " is not known at www.alanwood.net, trying PubChem") + if (is.na(bcpc_result[[1]][1])) { + message("Common name ", identifier, " is not known at the BCPC compendium, trying PubChem") } else { - self$alanwood = aw_result[[1]] - self$iso = self$alanwood$cname - attr(self$iso, "source") <- "alanwood" - attr(self$iso, "status") <- self$alanwood$status - aw_ik = self$alanwood$inchikey - if (length(aw_ik) == 1 && nchar(aw_ik) == 27 && !is.na(aw_ik)) { + self$bcpc = bcpc_result[[1]] + self$iso = self$bcpc$cname + attr(self$iso, "source") <- "bcpc" + attr(self$iso, "status") <- self$bcpc$status + bcpc_ik = self$bcpc$inchikey + if (length(bcpc_ik) == 1 && nchar(bcpc_ik) == 27 && !is.na(bcpc_ik)) { if (is.null(self$inchikey)) { - self$inchikey = self$alanwood$inchikey - attr(self$inchikey, "source") <- "alanwood" + self$inchikey = self$bcpc$inchikey + attr(self$inchikey, "source") <- "bcpc" } else { - if (aw_ik == self$inchikey) { - attr(self$inchikey, "source") = c(attr(self$inchikey, "source"), "alanwood") + if (bcpc_ik == self$inchikey) { + attr(self$inchikey, "source") = c(attr(self$inchikey, "source"), "bcpc") } else { - warning("InChIKey ", self$inchikey, " differs from ", aw_ik, " obtained from alanwood.net") + warning("InChIKey ", self$inchikey, " differs from ", bcpc_ik, " obtained from bcpc.org") } } } @@ -608,23 +617,4 @@ pp <- R6Class("pp", ) ) -rdkit_available <- function() -{ - if(requireNamespace("PythonInR", quietly = TRUE)) { - if (!PythonInR::pyIsConnected()) { - PythonInR::pyConnect() - } - sink(tempfile()) - try_rdkit <- try(PythonInR::pyImport("Chem", from = "rdkit"), - silent = TRUE) - sink() - if (inherits(try_rdkit, "try-error")) { - return(FALSE) - } else { - return(TRUE) - } - } else { - return(FALSE) - } -} # vim: set ts=2 sw=2 expandtab: @@ -0,0 +1,13 @@ +.onLoad = function(libname, pkgname) { + rdkit_available <- FALSE + if(requireNamespace("reticulate", quietly = TRUE)) { + rdkit_module <- try(reticulate::import("rdkit")) + if (!inherits(rdkit_module, "try-error")) { + rdkit_available <- TRUE + } + } + assign('rdkit_available', rdkit_available, envir = topenv()) + if (rdkit_available) { + assign('rdkit_module', rdkit_module, envir = topenv()) + } +} |