I am not sure if you can search exactly for this, but I would go to Advanced search: and then write DESCRIPTION
in the "With this file name" field.
Btw. for CRAN packages, there are easier ways to query the packages that use reticulate:
pkgcache::meta_cache_revdeps("reticulate", recursive=FALSE)$package
Output
c("BRACoD.R", "BrailleR", "CytOpT", "DALEXtra", "DesignCTPB",
"DrDimont", "EEMDlstm", "EWSmethods", "FSDAM", "GeoMongo", "IGP",
"LDNN", "MBMethPred", "MFSIS", "ML2Pvae", "MaOEA", "PAMpal",
"PressPurt", "PsychWordVec", "RAthena", "RChest", "RGF", "RIA",
"RISCA", "RPyGeo", "RcausalEGM", "Robyn", "Rstg", "SPOTMisc",
"Seurat", "TSdeeplearning", "TheOpenAIR", "Trading", "XRPython",
"ag5Tools", "aif360", "altair", "animl", "anndata", "autokeras",
"azuremlsdk", "bbknnR", "botor", "caracas", "causalOT", "chess",
"chromConverter", "cleanNLP", "clinspacy", "criticality", "deepredeff",
"deepregression", "deeptrafo", "dgpsi", "digitalDLSorteR", "dimensionalAnalysis",
"dynamicSDM", "edgebundle", "eseis", "fastai", "feamiR", "featuretoolsR",
"forImage", "fuzzywuzzyR", "grafzahl", "greta", "h2o4gpu", "ip2location",
"ip2proxy", "janus", "kerasR", "keras", "kerastuneR", "kgen",
"leiden", "lilikoi", "mboxr", "meltt", "mglasso", "mhcnuggetsr",
"mnda", "modeltime.gluonts", "motifr", "mxnorm", "neptune", "ngboostForecast",
"nmslibR", "onnx", "otsad", "pharmr", "phateR", "processpredictR",
"pyMTurkR", "pysd2r", "rMIDAS", "rTLsDeep", "rTorch", "rdaisi",
"rdataretriever", "rescue", "reservoirnet", "reticulate", "rgee",
"rgeedim", "rgeomstats", "rgudhi", "rpyANTs", "rpymat", "sarp.snowprofile.pyface",
"scaffolder", "scapGNN", "sendigR", "sentiment.ai", "sgmcmc",
"shapper", "simulariatools", "sjSDM", "slendr", "smallsets",
"snap", "spacyr", "sqlparseR", "stepmixr", "sudachir", "survivalSL",
"tensorflow", "text", "tfaddons", "tfautograph", "tfdatasets",
"tfdeploy", "tfestimators", "tfhub", "tfio", "tfprobability",
"tfruns", "theft", "tidyrgee", "transforEmotion", "umap", "voice",
"youtubecaption", "mixKernel", "SpatialDDLS", "basilisk", "cbpManager",
"crisprScore", "CRISPRseek", "DeepPINCS", "DIAlignR", "GenProSeq",
"Herper", "HiContacts", "idr2d", "MACSr", "MOFA2", "msImpute",
"multicrispr", "netZooR", "phemd", "recountmethylation", "rGenomeTracks",
"scPipe", "seqArchR", "snifter", "spatialDE", "VDJdive", "zellkonverter",
"APL", "BiocHail", "BiocSklearn", "CelliD", "dasper", "densvis",
"FLAMES", "HiCool", "scviR", "SimBu", "singleCellTK", "velociraptor",
"BP4RNAseq")